acronyms.comp revision 1.413
1$NetBSD: acronyms.comp,v 1.413 2025/09/01 16:21:56 jschauma Exp $ 23WHS three-way handshake 38VSB 8-state vestigial side band modulation 4AA anti-aliasing 5AAA authentication, authorization, [and] accounting 6AAT average access time 7ABE attribute-based encryption 8ABI application binary interface 9ABNF augmented backus-naur form 10ABR available bit rate 11ABRT automatic bug reporting tool 12AC alternating current 13ACI adjacent channel interferer 14ACID atomicity, consistency, isolation, durability 15ACK Amsterdam compiler kit 16ACK acknowledgement 17ACL access control list 18ACL active current loop 19ACL asynchronous connection less 20ACP auxiliary control {process,program} 21ACPI advanced configuration and power interface 22ACS access control set 23ACU automatic calling unit 24ADB Apple desktop bus 25ADC analog [to] digital converter 26ADD acronym driven development 27ADDDC adaptive double DRAM device correction 28ADO active data objects 29ADP automatic data processing 30ADPCM adaptive differential pulse code modulation 31ADS alternate data stream 32ADSL asymmetric digital subscriber line 33ADT abstract data type 34AEAD authenticated encryption with associated data 35AEDC advanced error detection and correction 36AER advanced error reporting 37AES Advanced Encryption Standard 38AFP Apple Filing Protocol 39AFS Andrew File System 40AGC automatic gain control 41AGP accelerated graphics port 42AI analog input 43AI artificial intelligence 44AL access list 45AL active link 46ALE address latch enable 47ALPN application-layer protocol negotiation 48ALS ambient light sensor 49ALSA advanced Linux sound architecture 50ALU arithmetic and logical unit 51ALUA asymmetric logical unit access 52AM access method 53AM alignment mask 54AM amplitude modulation 55AMD Advanced Micro Devices Inc 56AMDD Agile model-driven development 57AMI alternate mark inversion 58AMP asymmetric multiprocessing 59AMQP advanced message queuing protocol 60AMT active management technology 61AN Arabic number 62ANR application not responding 63ANSI American National Standards Institute 64AO analog output 65AOC add-on card 66AOL Alert-on-LAN 67AOS add or subtract 68AOT ahead of time 69AP access point 70AP application processor 71APEI ACPI platform error interface 72APFS Apple file system 73API application programming interface 74APIC advanced programmable interrupt controller 75APIPA automatic private IP addressing 76APM advanced power management 77APM application performance management 78APT advanced persistent threat 79APU accelerated processing unit 80AQM active queue management 81ARAT always running APIC timer 82ARC Advanced RISC Computing 83ARC adaptive replacement cache 84ARC automatic reference counting 85ARM Advanced RISC Machines 86ARP Address Resolution Protocol 87ARPA Advanced Research Projects Agency 88ARQ automatic repeat request 89ARR address range register 90ARU audio response unit 91AS autonomous system 92ASA Adaptive Security Appliance 93ASAN Address Sanitizer 94ASC advanced smart cache 95ASCII American Standard Code for Information Interchange 96ASD agile software development 97ASE advanced software environment 98ASF alert standard format 99ASIC application-specific integrated circuit 100ASK amplitude shift keying 101ASLR address space layout randomization 102ASN autonomous system number 103ASP active server pages 104ASP auxiliary storage pool 105ASPM active state power management 106ASQ automated software quality 107ASR Apple software restore 108ASR address space register 109AST abstract syntax tree 110AST asynchronous system trap 111AT access time 112AT advanced technology 113ATA advanced technology attachment 114ATAPI advanced technology attachment packet interface 115ATC address translation cache 116ATF ARM trusted firmware 117ATF automated testing framework 118ATM asynchronous transfer mode 119ATX advanced technology extended 120AV anti virus 121AVB audio video bridging 122AVL Adelson-Velsky-Landis 123AVX advanced vector extensions 124AWDL Apple wireless direct link 125BA byte align 126BAL basic assembly language 127BAR base address register 128BBS bulletin board system 129BCC blind carbon copy 130BCD binary coded decimal 131BCH boot console handler 132BCR byte count register 133BCS base configuration space 134BD baud 135BDD binary decision diagram 136BDI bit deinterleave 137BDUF big design up front 138BEDO burst extended data output 139BER basic encoding rules 140BER bit error {rate,ratio} 141BERT boot error record table 142BFD bidirectional forwarding detection 143BFD binary {file,format} descriptor 144BFKL big fscking kernel lock 145BFS breadth-first search 146BFT binary file transfer 147BGA ball grid array 148BGP Border Gateway Protocol 149BGPSEC BGP Security 150BIND Berkeley Internet Name Daemon 151BIOS Basic Input/Output System 152BIOS built-in operating system 153BIST built-in self-test 154BIU bus interface unit 155BKDG BIOS and kernel developer's guide 156BLAS basic linear algebra subprograms 157BLC back light control 158BLE Bluetooth low energy 159BLOB binary large object 160BM bus master 161BMC baseboard management controller 162BMIC bus master interface controller 163BMP basic multilingual plane 164BMP bitmap image file 165BN boundary neutral 166BNF Backus-Naur form 167BO binary output 168BOF beginning of file 169BOM beginning of message 170BOM byte order mark 171BP base pointer 172BP boot processor 173BPB BIOS parameter block 174BPDU bridge protocol data unit 175BPF Berkeley Packet Filter 176BPI bits per inch 177BPM business process modelling 178BPS bits per second 179BPSK binary phase shift keying 180BQP bounded-error quantum polynomial time 181BQS Berkeley quality software 182BRE basic regular expression 183BS backspace 184BS binary sequence 185BSA basic service area 186BSD Berkeley Software Distribution 187BSDP Boot Service Discovery Protocol 188BSF bit scan forward 189BSOD blue screen of death 190BSP binary space partition 191BSP board support package 192BSP bootstrap processor 193BSR bit scan reverse 194BSS basic service set 195BSS block started by symbol 196BSSID basic service set identifier 197BT BitTorrent 198BT Bluetooth 199BT bit test 200BTB branch target buffer 201BTB board-to-board 202BTC bit test [and] complement 203BTM bus transport mechanism 204BTR bit test [and] reset 205BTS bit test [and] set 206BTS bug tracking system 207BUAG big ugly ASCII graphic 208BW bandwidth 209BWM block-write mode 210CA certificate authority 211CAC cryptographic access control 212CACLS change access control lists 213CAD computer-aided design 214CAM computer assisted manufacturing 215CAM conditional access module 216CAM content addressable memory 217CAN controller area network 218CARP Common Address Redundancy Protocol 219CAS column address strobe 220CAS compare and swap 221CAS computer algebra system 222CASE computer aided software engineering 223CAU control access unit 224CAV constant angular velocity 225CBC cipher block chaining 226CBR constant bit rate 227CC carbon copy 228CCC Chaos Computer Club 229CCD charge coupled device 230CCI co-channel interferer 231CCNUMA cache-coherent non-uniform memory access 232CCTL command completion time limit 233CD cache disable 234CD compact disc 235CDDA compact disc digital audio 236CDL compiler description language 237CDMA code division multiple access 238CDN content delivery network 239CDP Cisco Discovery Protocol 240CDRAM cache dynamic random access memory 241CE customer edge 242CER canonical encoding rules 243CERT computer emergency response team 244CET control flow enforcement technology 245CF compact flash 246CFB cipher feedback 247CFG context-free grammar 248CFG control-flow graph 249CFI control-flow integrity 250CFRG Crypto Forum Research Group (IRTF) 251CG control gate 252CGA Color Graphics Adapter 253CGI common gateway interface 254CGN Carrier-Grade NAT 255CHAP Challenge-Handshake Authentication Protocol 256CHFS chip file system 257CHS cylinder/head/sector 258CI continuous integration 259CI {common,component} interface 260CIA confidentiality, integrity, availability 261CIDR Classless Inter-Domain Routing 262CIF common intermediate format 263CIFS Common Internet File System 264CIL common intermediate language 265CIR carrier-to-interference ratio 266CIS contact image sensor 267CISC complex instruction set {computer,computing} 268CJK Chinese, Japanese, [and] Korean 269CLF common log format 270CLI command line interface 271CLI common language infrastructure 272CLR common language runtime 273CLS common language specification 274CLTT closed loop thermal throttling 275CLUT color look-up table 276CLV constant linear velocity 277CM configuration management 278CMA concert multithread architecture 279CMC certificate management over CMS 280CMC chassis management controller 281CMC corrected machine check 282CMI control {management,method} interface 283CMOS complementary metal-oxide-semiconductor 284CMP chip multi-processing 285CMS content management system 286CMS cryptographic message syntax 287CMS {configuration,content,course} management system 288CMYK cyan magenta yellow black 289CN {common,canonical} name 290CNA CVE Numbering Authority 291CNC computer numerical control 292CNR carrier-to-noise ratio 293COA change of authority 294COF current operating frequency 295COFDM coded orthogonal frequency division multiplexing 296COFF common object file format 297COM component object model 298COM computer on module 299COMA cache-only memory architecture 300CORBA common object request broker architecture 301COS class of service 302COW copy-on-write 303CP continuous pilot 304CPA chosen-plaintext attack 305CPB core performance boost 306CPC central processor complex 307CPC cpu performance counters 308CPE common phase error 309CPE common platform enumeration 310CPER common platform error record 311CPG clock pulse generator 312CPI cycles per instruction 313CPL current privilege level 314CPLD complex programmable logic device 315CPP C preprocessor 316CPS characters per second 317CPS continuation-passing style 318CPT command pass through 319CPU central processing unit 320CR carriage return 321CRC cyclic redundancy check 322CRDT conflict-free replicated data type 323CRL carrier recovery loop 324CRLF carriage return line feed 325CRQC cryptanalytically relevant quantum computer 326CRT cathode ray tube 327CRTP curiously recurring template pattern 328CRUD create, read, update, and delete 329CS cable select 330CS chip select 331CS code segment 332CS computer science 333CSDL {common,conceptual} schema definition language 334CSI channel state information 335CSI common system interface 336CSIRT computer security incident response team 337CSMA carrier sense multiple access 338CSMA/CA carrier sense multiple access with collision avoidance 339CSMA/CD carrier sense multiple access with collision detection 340CSP communicating sequential processes 341CSP constrain satisfaction problems 342CSP content security policy 343CSP cryptographic service provider 344CSPM cloud security posture management 345CSR control [and] status registers 346CSRF cross-site request forgery 347CSRG Computer Systems Research Group 348CSS cascading style sheets 349CST common spanning tree 350CSU C start up 351CSV comma-separated values 352CTF compact c type format 353CTM close to metal 354CTR counter [mode] 355CTS clear to send 356CTS common type system 357CUA common user access 358CUT coordinated universal time 359CV control voltage 360CVE common vulnerabilities and exposures 361CVS Concurrent Versions System 362CVSS Common Vulnerability Scoring System 363DA destination address 364DAA distributed application architecture 365DAAP digital audio access protocol 366DAB digital audio broadcasting 367DAC digital [to] analog converter 368DAC discretionary access control 369DAD duplicate address detection 370DAE deterministic authenticated encryption 371DANE DNS-based Authentication of Named Entities 372DAO disk at once 373DAP Directory Access Protocol 374DAT digital audio tape 375DAT dynamic acceleration technology 376DB database 377DBA database administrator 378DBA dynamic bandwidth allocation 379DBB data bus buffer 380DBC design by contract 381DBL dynamic buffer limiting 382DBMS database management system 383DBS database server 384DC data center 385DC direct current 386DCC Direct Client-to-Client 387DCC direct cable connect 388DCD data carrier detect 389DCE data control equipment 390DCE distributed computing environment 391DCIM data center infrastructure management 392DCIM digital camera images 393DCL Digital Command Language 394DCOM distributed component object model 395DCOP Desktop COmmunication Protocol 396DCS data collection systems 397DCT discrete cosine transform 398DCU data cache unit 399DDC display data channel 400DDE dynamic data exchange 401DDI device drivers interface 402DDK device driver kit 403DDL data description language 404DDR double data rate 405DDS direct digital sound 406DDWG Digital Display Working Group 407DE debugging extensions 408DE desktop environment 409DEA data encryption algorithm 410DEC Digital Equipment Corporation 411DEK data encryption key 412DEP data execution prevention 413DER distinguished encoding rules 414DES Data Encryption Standard 415DF don't fragment 416DFA deterministic finite automaton 417DFC data flow control 418DFS depth first search 419DFS distributed file system 420DFSAN Data Flow Sanitizer 421DFT diagnostic function test 422DFT discrete Fourier transform 423DFZ default-free zone 424DGEMM double precision general matrix multiply 425DGL data generation language 426DH Diffie-Hellman 427DHCP Dynamic Host Configuration Protocol 428DIA dedicated Internet access 429DIB device independent bitmap 430DIFS distributed inter-frame space 431DIMM dual inline memory module 432DIRT design in real time 433DKI driver/kernel interface 434DL diode logic 435DL discrete logarithm 436DL download 437DLCI data link connection identifier 438DLE data link escape 439DLL dynamic link library 440DLNA digital living network alliance 441DLP discrete logarithm problem 442DMA direct memory access 443DMB data memory barrier (Arm) 444DMI desktop management interface 445DMS document management system 446DMT discrete multitone modulation 447DMU data management layer 448DNARD Digital network appliance reference design 449DND drag and drop 450DNLC directory name lookup cache 451DNS Domain Name System 452DNSBL Domain Name System Block List 453DNSSEC DNS Security Extensions 454DOE distributed object environment 455DOF data over fibre 456DOH DNS over HTTPS 457DOM document object model 458DOQ DNS over QUIC 459DOS denial of service 460DOS disk operating system 461DOT DNS over TLS 462DP DisplayPort 463DPAA data path acceleration architecture 464DPC deferred procedure call 465DPCM differential pulse code modulation 466DPD dead peer detection 467DPDK data plane development kit 468DPI deep packet inspection 469DPI dots per inch 470DPL descriptor privilege level 471DPS Display PostScript 472DPST display power savings technology 473DRAAS disaster recovery as a service 474DRAM dynamic random access memory 475DRBG deterministic random bit generator 476DRI direct rendering infrastructure 477DRM digital rights management 478DRM direct rendering manager 479DRN Discovery of Network-designated Resolvers 480DRRS display refresh rate switching 481DS debug store 482DS differentiated services 483DS delegation signer 484DS9000 DeathStation 9000 485DS9K DeathStation 9000 486DSA digital signature algorithm 487DSAP destination service access point 488DSB data synchronization barrier (Arm) 489DSB double-sideband modulation 490DSCP differentiated services code point 491DSDT differentiated system descriptor table 492DSF device special file 493DSL dataset and snapshot layer 494DSL digital subscriber line 495DSL domain specific language 496DSLAM digital subscriber line access multiplexer 497DSN delivery status notification 498DSO dynamic shared object 499DSP digital signal processor 500DSSS direct sequence spread spectrum 501DTB device tree blob 502DTC device tree compiler 503DTD document type definition 504DTE data terminal equipment 505DTE dumb terminal emulator 506DTL diode-transistor logic 507DTLS datagram transport layer security 508DTS device tree source 509DTS digital thermal sensor 510DUT device under test 511DVB digital video broadcasting 512DVCS distributed version control system 513DVD digital versatile disc 514DVFS dynamic voltage and frequency scaling 515DVI Digital Visual Interface 516DVI device independent 517DVR digital video recorder 518DWARF Debugging With Attributed Record Formats 519E-XER extended XML encoding rules 520EABI embedded-application binary interface 521EAI Email Address Internationalization 522EAI Enterprise Application Integration 523EAP Extensible Authentication Protocol 524EAPOL EAP over Lan 525EAV entity-attribute-value model 526EAV ethernet audio/video bridging 527EBCDIC Extended Binary Coded Decimal Interchange Code 528EBDA Extended BIOS Data Area 529EBNF extended backus-naur form 530EBR extended boot record 531EC elliptic curve 532ECC elliptic curve cryptography 533ECC error correction code 534ECDH elliptic curve Diffie-Hellman 535ECDL elliptic curve discrete logarithm 536ECDLP elliptic curve discrete logarithm problem 537ECDSA elliptic curve digital signature algorithm 538EDDSA Edwards-curve digital signature algorithm 539ECL emitter-coupled logic 540ECN explicit congestion notification 541ECP enhanced capability port 542ECS enhanced chip set 543ECS extended configuration space 544EDAC error detection and correction 545EDAT enhanced dynamic acceleration technology 546EDGE explicit data graph execution 547EDID extended display identification data 548EDO extended data out 549EDS electronical data sheet 550EDSAC electronic delay storage automatic calculator 551EDVAC electronic discrete variable automatic computer 552EEE embrace, extend, extinguish 553EEE energy efficient ethernet 554EEPROM electrically erasable programmable read only memory 555EFI extensible firmware interface 556EFL emitter follower logic 557EFM eight to fourteen modulation 558EFS extent file system 559EGA Enhanced Graphics Adapter 560EGP exterior gateway protocol 561EH extension header 562EIDE enhanced IDE 563EINJ error injection table 564EISA extended industry standard architecture 565EKU extended key usage (x509) 566ELF executable and linking format 567ELS entry level system 568EMACS Editor MACroS 569EMI electro-magnetic interference 570EMP electro-magnetic pulse 571EMR electro-magnetic radiation 572EMS extended master secret (RFC7627) 573ENIAC electronic numerical integrator and computer 574EOF end of file 575EOI end of interrupt 576EOIS end of interactive support 577EOL end of life 578EOL end of line 579EOT end of transmission 580EPIC explicitly parallel instruction computing 581EPP enhanced parallel port 582EPP extensible provisioning protocol (RFC5730) 583EPRML extended partial response, maximum likelihood 584EPROM erasable programmable read only memory 585EPSS Exploit Prediction Scoring System 586EPT extended page tables 587ERC error recovery control 588ERD emergency recovery disk 589ERD entity relationship diagram 590ERE extended regular expression 591ERST error record serialization table 592ESAN Efficiency Sanitizer 593ESB enterprise service bus 594ESDI enhanced small disk interface 595ESDRAM enhanced synchronous dynamic random access memory 596ESI enclosure services interface 597ESS electronic switching system 598ESS extended service set 599ESSID extended service set identifier 600EST enhanced speedstep 601ETL extract, transform, load 602EU execution unit 603EULA end user license agreement 604EdDSA Edwards curve digital signature algorithm 605FAT file allocation table 606FBL feedback loop 607FBRAM frame buffer random access memory 608FCIF full common intermediate format 609FCL fiber channel loop 610FCS frame check sequence 611FDC floppy disk controller 612FDD floppy disk drive 613FDDI fiber distributed data interface 614FDE full disk encryption 615FDT flattened device tree 616FEA finite element analysis 617FEC forward error correction 618FET field-effect transistor 619FF finite field 620FF form feed 621FFDH finite-field Diffie-Hellman 622FFH functional fixed hardware 623FFI foreign function interface 624FFM focus follows mouse 625FFS Fast File System 626FFS find first set 627FFT fast Fourier transform 628FG floating gate 629FHE fully homomorphic encryption 630FHRP first hop redundancy protocol 631FHSS frequency hop spread spectrum 632FID frequency identifier 633FIFO first in, first out 634FILO first in, last out 635FIPS Federal Information Processing Standards 636FIR fast infrared 637FLOPS floating [point] operations per second 638FLOSS free/libre/open source software 639FM frequency modulation 640FMR false match rate 641FOSS free/open source software 642FPGA field programmable gate array 643FPM fast page mode 644FPR floating point register 645FPU floating point unit 646FQDN fully qualified domain name 647FRR false rejection rate 648FRR Free Range Routing 649FRU field replaceable unit 650FS file system 651FSB front side bus 652FSCK file system check 653FSF Free Software Foundation 654FSK frequency shift keying 655FSM finite-state machine 656FTA fault tree analysis 657FTL flash translation layer 658FTP File Transfer Protocol 659FTPS File Transfer Protocol Secure 660FTTH fiber to the home 661FUS fast user switching 662FWH firmware hub 663FWS folding white space 664GAL generic array logic 665GARP generic attribute registration protocol 666GAS generic address structure 667GC garbage collector 668GCC GNU Compiler Collection 669GCM Galois counter mode 670GCR group-coded recording 671GDI Graphics Device Interface 672GDT global descriptor table 673GDT (block) group descriptor table 674GECOS general comprehensive operating supervisor 675GEM graphics environment manager 676GEM graphics execution manager 677GEMM general matrix multiply 678GENA general event notification architecture 679GHC Glasgow Haskell compiler 680GHES generic hardware error source 681GIC generic interrupt controller 682GID group identifier 683GIF graphics interchange format 684GLBP gateway load balancing protocol 685GMCH graphics and memory controller hub 686GNU GNU's Not Unix 687GOP graphics output protocol 688GOT global offset table 689GPE general purpose event 690GPF general protection fault 691GPG GNU Privacy Guard 692GPL [GNU] General Public License 693GPR general purpose register 694GPS generalized processor sharing 695GPT GUID partition table 696GPU graphics processing unit 697GR golden ratio 698GRE generic routing encapsulation 699GRO generic receive offload 700GSI global system interrupt 701GSO generic send offload 702GUA global unicast address 703GUI graphical user interface 704GUID globally unique identifier 705GUS Gravis UltraSound 706GVFS git virtual file system 707HA high availability 708HAL hardware abstraction layer 709HAT hashed array tree 710HATEOAS hypermedia as the engine of application state 711HBA host bus adapter 712HBS hash-based signature 713HCC Home Cable Computer 714HCCA Home Cable Computer Adaptor 715HCF halt and catch fire 716HCI host controller interface 717HCI human-computer interaction 718HCL hardware compatibility list 719HDCP High-bandwidth Digital Content Protection 720HDD hard disk drive 721HDL hardware description language 722HDMI High-Definition Multimedia Interface 723HDTV high-definition television 724HECI host embedded controller interface 725HEST hardware error source table 726HEVC high efficiency video coding 727HF high frequency 728HFM highest frequency mode 729HFS hierarchical file system 730HID human interface device 731HKDF HMAC-based key derivation function 732HKP HTTP Keyserver Protocol 733HLE hardware lock elision (Intel) 734HLL high-level language 735HMA high memory area 736HMI human-machine interface 737HNDL harvest now, decrypt later 738HOOD hierarchical object oriented design 739HOTP HMAC-based one time password 740HP Hewlett-Packard 741HPC high performance computing 742HPD hot plug detection 743HPET high precision event timer 744HPKE hybrid public key encryption 745HQC Hamming Quasi-Cyclic 746HSM hardware security module 747HSM hierarchical storage management 748HSRP hot standby router protocol 749HT hyper-threading 750HTC hardware thermal control 751HTCC high temperature co-fired ceramic 752HTML HyperText Markup Language 753HTT hyper-threading technology 754HTTP Hypertext Transfer Protocol 755HTTPS Hypertext Transfer Protocol Secure 756HVDS High-Voltage Differential Signaling 757HVM hardware virtual machine 758HWASAN Hardware-assisted Address Sanitizer 759HZ Hertz 760I2O intelligent input/output 761IA information assurance 762IAAS infrastructure as a service 763IAB Internet Architecture Board 764IANA Internet Assigned Numbers Authority 765IBC iterated block cipher 766IBM International Business Machines 767IBPI international blinking pattern interpretation 768IBS instruction based sampling 769IBSS independent basic service set 770IBT indirect branch tracking 771IC integrated circuit 772ICA independent computer architecture 773ICACLS integrity control access control lists 774ICB Internet Citizen's Band 775ICE in-circuit emulator 776ICE internal compiler error 777ICH I/O controller hub 778ICMP Internet Control Message Protocol 779ICT information and communications technology 780ICW initialization command word 781IDA Intel dynamic acceleration 782IDCMP Intuition direct communication message port 783IDCT inverse discrete cosine transform 784IDE integrated development environment 785IDE integrated drive electronics 786IDPS intrusion detection [and] prevention system 787IDRP inter-domain routing protocol 788IDS intrusion detection system 789IDT interrupt descriptor table 790IE Internet Explorer 791IEC International Electrotechnical Commission 792IEEE Institute of Electrical and Electronics Engineers 793IESG Internet Engineering Steering Group 794IETF Internet Engineering Task Force 795IF intermediate frequency 796IFCM isochronous flow control mode 797IFF Interchange File Format 798IFS internal field separator 799IGD Internet gateway device 800IGMP Internet Group Management Protocol 801IGP interior gateway protocol 802IHV independent hardware vendor 803IKE Internet key exchange 804IKM input keying material 805ILM internal loopback mode 806ILOM integrated lights-out management 807ILP instruction level parallelism 808IM instant messaging 809IMAP Internet Message Access Protocol 810IMC integrated memory controller 811IMCR interrupt mode configuration register 812IME input method editor 813IMR interrupt mask register 814IMS information management system 815IMSI international mobile subscriber identity 816INCITS InterNational Committee for Information Technology Standards 817INODE index node 818IO input/output 819IOCTL input/output control 820IOM input/output managers 821IOMMU input/output memory management unit 822IOT Internet of Things 823IP Internet Protocol 824IP intellectual property 825IPC instructions per cycle 826IPC interprocess communication 827IPCF interprocess communication facility 828IPE integrated programming environment 829IPI intelligent peripheral interface 830IPI interprocessor interrupt 831IPL Initial Program Load 832IPL Interrupt Priority Level 833IPMB Intelligent Platform Management Bus 834IPMI Intelligent Platform Management Interface 835IPNG Internet Protocol, Next Generation 836IPS in-plane switching 837IPS intrusion prevention system 838IPSEC Internet Protocol Security 839IR intermediate representation 840IRC Internet Relay Chat 841IRDA infrared data association 842IRDP ICMP Router Discovery Protocol 843IRQ interrupt request 844IRQL interrupt request level 845IRR interrupt request register 846IRTF Internet Research Task Force 847IS information system 848ISA industry standard architecture 849ISA instruction set architecture 850ISB instruction synchronization barrier (Arm) 851ISDN integrated services digital network 852ISE instant secure erase 853ISI inter-symbol interference 854ISL initial system load 855ISM industrial, scientific, [and] medical 856ISMS information system management system 857ISN initial serial number 858ISO International Standards Organization 859ISOC Internet Society 860ISP Internet service provider 861ISR in-service register 862ISR interrupt service routine 863IST internal spanning tree 864IST interrupt stack table 865ISV independent software vendor 866IT information technology 867ITB Intel Turbo Boost 868ITIL information technology infrastructure library 869ITP in-target probe 870ITSM IT service management 871IV initialization vector 872IVT interrupt vector table 873JBOD just a bunch of disks 874JCL Job Control Language 875JFET junction [gate] field-effect transistor 876JIT just in time 877JPEG Joint Photographic Experts Group 878JRE Java Runtime Environment 879JSON JavaScript Object Notation 880JTAG joint test action group 881KASAN Kernel Address Sanitizer 882KASLR kernel address space layout randomization 883KB keyboard 884KB kilobyte 885KBD keyboard 886KBD kilobaud 887KCS keyboard controller style 888KDF key derivation function 889KEK key encryption key 890KEM key encapsulation mechanism 891KLOC thousand lines of code 892KMS kernel-mode setting 893KPI kernel programming interface 894KSK key signing key 895KVA kernel virtual address 896KVM kernel virtual machine 897KVM kernel virtual memory 898KVM keyboard, video, [and] mouse 899L2CAP link layer control and adaptation protocol 900L4S Low Latency, Low Loss and Scalable Throughput (RFC9330) 901LAG link aggregation group 902LAMP Linux Apache MySQL {Perl,PHP,Python} 903LAN local area network 904LAPIC local advanced programmable interrupt controller 905LAR load access rights 906LBA logical block addressing 907LBNF labeled backus-naur form 908LBS location-based service 909LCD liquid crystal display 910LCP link control protocol 911LDA local delivery agent 912LDAP Lightweight Directory Access Protocol 913LDR light-dependent resistor 914LDT local descriptor table 915LE logical extent 916LED light emitting diode 917LELL low energy link layer 918LER label edge router 919LF line feed 920LF low frequency 921LFM lowest frequency mode 922LFN long file names 923LFO low-frequency oscillation 924LFS log-structured file system 925LFU least frequently used 926LHP loop heat pipe 927LIF logical interchange format 928LIFO last in, first out 929LILO LInux LOader 930LILO last in, last out 931LINT local interrupt 932LIR local Internet registry 933LISP LISt Processor 934LISP Locator/ID Separation Protocol 935LKM {Linux,loadable} kernel module 936LKML Linux kernel mailing list 937LL load linked 938LL/SC load linked/store conditional 939LLC logical link control 940LLD low-level design 941LLDD low-level design document 942LLDP link layer discovery protocol 943LLF low level format 944LLMNR link-local multicast name resolution 945LLVM Low Level Virtual Machine 946LM long mode 947LMCE local machine check exception 948LMI local management interface 949LMM link management mode 950LMP link management protocol 951LMS Leighton-Micali Signature 952LNO loop nest optimization 953LOC lines of code 954LOM lights-out management 955LPC low pin count 956LPE Linux performance events 957LPS local positioning system 958LRC longitudinal redundancy check 959LRM left-to-right mark 960LRO Large Receive Offload 961LRO left-to-right override 962LRU least recently used 963LS link state 964LSAN Leak Sanitizer 965LSB Linux standards base 966LSB least significant {bit,byte} 967LSI large scale integration 968LSL load segment limit 969LSM log structured merge 970LSN Large Scale NAT 971LSN log sequence number 972LSO large send offload 973LSR label switch router 974LTCC low temperature co-fired ceramic 975LTO linear tape-open 976LTO link time optimization 977LTR left to right 978LTR letter(-sized paper) 979LTR load task register 980LTS long term support 981LUA Lua Uppercase Accident 982LUN logical unit number 983LV logical volume 984LVDS Low-Voltage Differential Signaling 985LVM logical volume management 986LVT local vector table 987LWP light-weight process 988LZSS Lempel Ziv Storer Szymanski 989LZW Lempel Ziv Welch 990MAB MAC authentication bypass 991MAC mandatory access control 992MAC message authentication {check,code} 993MAC {media,medium} access control 994MADT multiple APIC descriptor table 995MAMR microwave-assisted magnetic recording 996MB megabyte 997MBA multi-boot agent 998MBR master boot record 999MBS megabits per second 1000MC memory controller 1001MCA MicroChannel architecture 1002MCA machine check architecture 1003MCC multiversion concurrency control 1004MCE machine check exception 1005MCGA Multi-Color Graphics Array 1006MCH memory controller hub 1007MCLAG multi-chassis link aggregation group 1008MCM multi-chip module 1009MCQ memory controlled queue 1010MD MiniDisc 1011MD machine-dependent 1012MD-SAL model-driven service abstraction layer 1013MDA Monochrome Display Adapter 1014MDA mail delivery agent 1015MDC Management Data Clock 1016MDI Medium Dependent Interface 1017MDI-X Medium Dependent Interface Crossover 1018MDIO Management Data Input/Output 1019MDMX MIPS Digital Media eXtension 1020MDRAM multibank dynamic random access memory 1021MDS microarchitectural data sampling 1022MESI modified, exclusive, shared, invalid 1023MFC Microsoft Foundation Classes 1024MFC merge from current 1025MFM modified frequency modulation 1026MFU most frequently used 1027MGCP media gateway control protocol 1028MHU message handling unit 1029MI machine interface 1030MI machine-independent 1031MIB management information base 1032MIC message integrity {check,code} 1033MID mobile Internet device 1034MIDI musical instrument digital interface 1035MIF management information format 1036MII media independent interface 1037MIM man in the middle 1038MIMD multiple instruction, multiple data 1039MIME Multipurpose Internet Mail Extensions 1040MIMO multiple input multiple output 1041MIPS Microprocessor without Interlocked Pipeline Stages 1042MIPS million instructions per second 1043MISD multiple instruction, single data 1044MIT Massachusetts Institute of Technology 1045MITM man in the middle 1046ML machine language 1047ML machine learning 1048ML mailing list 1049ML markup language 1050ML maximum likelihood 1051ML-KEM module-lattice based key-encapsulation mechanism 1052MLAG multi-chassis link aggregation group 1053MLC multi-level cell 1054MLD multicast listener discovery 1055MLHP micro loop heat pipe 1056MLIR multi-level intermediate representation 1057MLO MMC loader 1058MMC multi-media card 1059MMF multi-mode fiber 1060MMIC monolithic microwave integrated circuit 1061MMIO memory mapped input/output 1062MMORPG massive multiplayer online role playing game 1063MMRP multiple MAC registration protocol 1064MMU memory management unit 1065MMX matrix math extension 1066MMX multimedia extension 1067MMX multiple math extension 1068MO magneto-optical 1069MOESI modified, owned, exclusive, shared, invalid 1070MOF maximum operating frequency 1071MOSFET metal-oxide-semiconductor field-effect transistor 1072MOSI modified, owned, shared, invalid 1073MP multi-platform 1074MP multiplayer 1075MP {multiprocessing,multiprocessor} 1076MPEG moving picture experts group 1077MPI message passing interface 1078MPLS Multiprotocol Label Switching 1079MPP massively parallel processor 1080MPS memory pool system 1081MPS multiprocessor specification 1082MQTT Message Queuing Telemetry Transport 1083MR modem ready 1084MRO method resolution order 1085MRP multiple registration protocol 1086MRU most recently used 1087MS Microsoft 1088MSAN Memory Sanitizer 1089MSB most significant {bit,byte} 1090MSC message sequence chart 1091MSE mean square error 1092MSF minutes seconds frames 1093MSI message signaled interrupt 1094MSI modified, shared, invalid 1095MSR {machine state,model-specific} register 1096MSS maximum segment size 1097MSTP Multiple Spanning Tree Protocol 1098MT machine translation 1099MTA mail transfer agent 1100MTBF mean time between failures 1101MTP media transfer protocol 1102MTRR memory type range register 1103MTTF mean time to failure 1104MTU maximum transmission unit 1105MUA mail user agent 1106MUD multi-user domain 1107MVCC multiversion concurrency control 1108MVR multicast VLAN registration 1109MVRP multiple VLAN registration protocol 1110MWE module width encoding 1111MX mail exchange 1112MZM Majorana zero mode 1113NACK negative acknowledgement 1114NAK negative acknowledgement 1115NAN neighbor awareness networking 1116NAN not a number 1117NAPT Network Address Port Translation 1118NAS network attached storage 1119NAT network address translation 1120NAV network allocation vector 1121NC numerical control 1122NC-SI network controller sideband interface 1123NCO numerically-controlled oscillator 1124NCP Network Control Protocol 1125NCQ native command queuing 1126NCSI network connectivity status indicator 1127ND neighbor discovery 1128NDFA nondeterministic finite automaton 1129NDIS network driver interface specification 1130NE numeric error 1131NEWS Network extensible Window System 1132NFA nondeterministic finite automaton 1133NFC near-field communication 1134NFCI no functional change intended 1135NFS network file system 1136NFV network function virtualization 1137NHACP NABU HCCA Application Communication Protocol 1138NIA next instruction address 1139NIC network information center 1140NIC network interface card 1141NIDS network intrusion detection system 1142NIKE Non-Interactive Key Exchange 1143NIP network interface protocol 1144NIPR non-classified IP router (network) 1145NIPS network intrusion prevention system 1146NIS network information service 1147NIST National Institute of Standards and Technology 1148NLS native language support 1149NMI non-maskable interrupt 1150NMR nonce-misuse resistance 1151NNTP Network News Transfer Protocol 1152NOC network operations center 1153NOP no operation 1154NOS network operating system 1155NP nondeterministic polynomial time 1156NRND not recommended for new designs 1157NRZ non-return to zero 1158NSA National Security Agency 1159NSA nation-state adversary 1160NSA no such agency 1161NTA negative trust anchor 1162NTM non-deterministic Turing machine 1163NTP Network Time Protocol 1164NUMA non-uniform memory access 1165NURBS non-uniform rational basis spline 1166NVD National Vulnerability Database 1167NVMM NetBSD Virtual Machine Monitor 1168NVMM non-volatile main memory 1169NVRAM non-volatile random access memory 1170NW not write-through 1171NX no execute 1172OAEP optimal asymmetric encryption padding 1173OAM operations, administration, and {management,maintenance} 1174OBO off by one 1175OBOE off by one error 1176OCL object constraint language 1177OCR optical character recognition 1178ODBC Open Database Connectivity 1179ODCM on-demand clock modulation 1180ODE offline device environment 1181ODI open data-link interface 1182ODM object data manager 1183ODMR on-demand mail relay 1184ODT on-die termination 1185OEM original equipment manufacturer 1186OFB output feedback 1187OFDM orthogonal frequency division multiplexing 1188OFET organic field-effect transistor 1189OLAP online analytical processing 1190OLE object linking and embedding 1191OLTP online transaction processing 1192ONCE on-{chip,circuit} emulation 1193ONFI open nand flash interface 1194OO OpenOffice 1195OO object oriented 1196OOB out of band 1197OOE out of order execution 1198OOM out of memory 1199OOO OpenOffice.org 1200OOP object oriented programming 1201OOPS object oriented programming systems 1202OOSE object oriented software engineering 1203OPM operations per minute 1204OPS operations per second 1205OQL Object Query Language 1206ORB object request broker 1207ORM object-relational mapping 1208OS operating system 1209OSD object-based storage device 1210OSD open source definition 1211OSF open software foundation 1212OSI Open Source Initiative 1213OSI open systems interconnection 1214OSPF open shortest path first 1215OSPM OS power management 1216OSS open sound system 1217OSS open source software 1218OSVW operating system visible workarounds 1219OTP one time password 1220OTP open telecom platform 1221OU organizational unit 1222OUI organizationally unique identifier 1223OWASP Open Web Application Security Project 1224OWL Web Ontology Language 1225P2P PCI to PCI 1226P2P peer to peer 1227PA phase accumulator 1228PA physical address 1229PAAS platform as a service 1230PAC phase-amplitude converter 1231PAE physical address extension 1232PAGP port aggregation protocol 1233PAL phase alternating line 1234PAL programmable array logic 1235PAM pluggable authentication modules 1236PAM pulse amplitude modulation 1237PAP password authentication protocol 1238PAT page attribute table 1239PAT port address translation 1240PATA parallel ATA 1241PAX portable archive exchange 1242PBE pending break encoding 1243PBE programming by example 1244PBKDF password-based key derivation function 1245PBR partition boot record 1246PBX private branch exchange 1247PC personal computer 1248PC program counter 1249PCB Protocol Control Block 1250PCB printed circuit board 1251PCB process control block 1252PCBC propagating cipher block chaining 1253PCC Portable C Compiler 1254PCD page-level cache disable 1255PCE path computation element 1256PCE performance-monitor counter enable 1257PCEP Path Computation Element Protocol 1258PCH platform controller hub 1259PCI peripheral component interconnect 1260PCM phase change memory 1261PCM pulse code modulation 1262PCMCIA Personal Computer Memory Card International Association 1263PCP Port Control Protocol 1264PCR Platform Configuration Register 1265PD public domain 1266PDA personal digital assistant 1267PDA pushdown automaton 1268PDAG propositional directed acyclic graph 1269PDB power distribution board 1270PDF portable document format 1271PDM pulse-duration modulation 1272PDN pull-down network 1273PDP page {descriptor,directory} page 1274PDS product data sheet 1275PDU protocol data unit 1276PE portable executable 1277PE protection enable 1278PE provider edge 1279PEAP Protected EAP 1280PECI platform environment control interface 1281PED PIN Entry Device 1282PEP protocol extension protocol 1283PER packed encoding rules 1284PFS perfect forward secrecy 1285PGAS partitioned global address space 1286PGE page global enable 1287PGO profile guided optimization 1288PGP Pretty Good Privacy 1289PHB PCI host bridge 1290PHP PHP: Hypertext Preprocessor 1291PIC performance instrumentation counters 1292PIC position independent code 1293PIC programmable interrupt controller 1294PICNIC problem in chair, not in computer 1295PID process id 1296PIE position independent executable 1297PIL Priority Interrupt Level 1298PIM personal information manager 1299PIM platform-independent model 1300PIO programmed input/output 1301PIPT physically indexed, physically tagged 1302PIQ prefetch input queue 1303PIR private information retrieval 1304PIT programmable interrupt timer 1305PIV personal identity verification 1306PIX Private Internet eXchange 1307PKCS public-key cryptography standards 1308PKE public key encryption 1309PKI public key infrastructure 1310PLC programmable logic controller 1311PLD programmable logic device 1312PLL phase locked loop 1313PLRU pseudo LRU 1314PLT procedure linkage table 1315PLTM package level thermal management 1316PM power management 1317PM {phase,pulse} modulation 1318PMC performance monitoring counters 1319PME power management event 1320PMEG page map entry group 1321PMI performance monitoring infrastructure 1322PMI platform management interrupt 1323PMIC power management integrated circuit 1324PMIO port-mapped input/output 1325PMT photo-multiplier tube 1326PMU performance monitoring units 1327PMU power management unit 1328PNG portable network graphics 1329PNP plug and play 1330POE power over ethernet 1331POF probability of failure 1332POP Post Office Protocol 1333POP power on password 1334POR plan of record 1335POSIX Portable Operating System Interface [for Unix] 1336POST power on self test 1337POTS plain old telephone system 1338POWER Performance Optimization With Enhanced RISC 1339POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1340PP pair programming 1341PPB PCI [to] PCI bridge 1342PPC Power Performance Computing 1343PPC PowerPC 1344PPI pixels per inch 1345PPM pages per minute 1346PPP Point-to-Point Protocol 1347PPPOA Point-to-Point Protocol over ATM 1348PPPOE Point-to-Point Protocol over Ethernet 1349PPR processor programming reference 1350PPT powerpoint 1351PPT punched paper tape 1352PPU physics processing unit 1353PQC post-quantum cryptography 1354PRAM Parameter RAM 1355PRBS pseudorandom bit sequence 1356PRF pseudorandom function [family] 1357PRG pseudorandom generator 1358PRML partial response, maximum likelihood 1359PRN pseudorandom {noise,number} 1360PRNG pseudorandom number generator 1361PROM programmable read only memory 1362PRP pseudorandom permutation 1363PRU Programmable Realtime Unit 1364PS PostScript 1365PSD power spectral density 1366PSE page size extensions 1367PSK phase shift keying 1368PSK pre-shared key 1369PSTN public switched telephone network 1370PSW program status word 1371PTE page table entry 1372PTLA pseudo top level aggregator 1373PTP page table page 1374PTV perceived target value 1375PU processing unit 1376PUC personal unblocking code 1377PUN physical unit number 1378PV physical volume 1379PVC permanent virtual circuit 1380PVG physical volume group 1381PVI protected-mode virtual interrupt 1382PVRST Per-VLAN rapid spanning tree 1383PVST Per-VLAN Spanning Tree 1384PWM pulse width modulation 1385PXE preboot execution environment 1386QA quality assurance 1387QAM quadrature amplitude modulation 1388QAM quality assurance management 1389QBE query by example 1390QC quality control 1391QCIF quarter common intermediate format 1392QDI quasi delay insensitive 1393QOI quality of implementation 1394QOI quick order interface 1395QOS quality of service 1396QPU quantum processing unit 1397QUIC Quick UDP Internet Connections 1398QVL qualified vendor list 1399R/O read only 1400R/W read/write 1401RA receiver address 1402RA remote assistance 1403RA resource affinity 1404RA router advertisement 1405RAD rapid application development 1406RADIUS remote authentication dial-in user service 1407RAID redundant array of {independent,inexpensive} disks 1408RAII resource acquisition is initialization 1409RAM random access memory 1410RAS reliability, availability and serviceability 1411RAS remote access service 1412RAS restartable atomic sequence 1413RAS row address strobe 1414RAT register allocation table 1415RAT remote access trojan 1416RBF radial basis function 1417RBL real-time blackhole list 1418RBL reputation block list 1419RBNF routing backus-naur form 1420RBT red-black tree 1421RC release candidate 1422RC remote control 1423RC run commands 1424RCS Revision Control System 1425RCU read, copy, update 1426RDB Rigid Disk Block 1427RDBMS relational database management system 1428RDF Resource Description Framework 1429RDM relational data model 1430RDMA remote direct memory access 1431RDP remote desktop protocol 1432RDRAM Rambus DRAM 1433RE regular expression 1434REPL read, evaluate, print, loop 1435REST representational state transfer 1436RF radio frequency 1437RFB remote frame buffer 1438RFI radio frequency interference 1439RFO request for ownership 1440RFU reserved for future use 1441RGB red green blue 1442RGBA red green blue alpha 1443RGMII reduced gigabit media independent interface 1444RH read hit 1445RHEL Red Hat Enterprise Linux 1446RHL Red Hat Linux 1447RIB routing information base 1448RIFF Resource Interchange File Format 1449RIP Raster Image Processor 1450RIP Routing Information Protocol 1451RIPR releasable IP router (network) 1452RIR regional Internet registry 1453RISC reduced instruction set {computer,computing} 1454RKM ROM Kernel Manual 1455RLE run length encoding 1456RLL run length limited 1457RLO right-to-left override 1458RM read miss 1459RMCP Remote Management Control Protocol 1460RMI remote method invocation 1461RMO Relaxed Memory Ordering 1462RMPM rapid memory power management 1463RMS root mean square 1464RMW read, modify, write 1465RNG random number generator 1466ROA route origin authorization 1467ROM read only memory 1468ROP return-oriented programming 1469RPC remote procedure call 1470RPG Report Program Generator 1471RPKI resource PKI 1472RPL requested privilege level 1473RPM revolutions per minute 1474RPN reverse Polish notation 1475RPVST Rapid Per-VLAN Spanning Tree 1476RPZ response policy zone 1477RR random replacement 1478RR resource record 1479RR round robin 1480RRSIG resource record signature 1481RS relay station 1482RSA Rivest, Shamir, [and] Adleman 1483RSC Receive Segment Coalescing 1484RSIP Realm Specific IP 1485RSN Robust Secure Network 1486RSS Receive Side Scaling 1487RSS really simple syndication 1488RSS residual sum of squares 1489RSTP Rapid Spanning Tree Protocol 1490RT real time 1491RTC real time clock 1492RTC real time computing 1493RTF rich text format 1494RTL register transfer language 1495RTL resistor-transistor logic 1496RTL right to left 1497RTM restricted transactional memory (Intel) 1498RTOS real time operating system 1499RTP Real-time Transport Protocol 1500RTS request to send 1501RTT round trip time 1502RTTI run-time type information 1503RUP rational unified process 1504RW Rabin-Williams 1505RWM read-write memory 1506RX {receive,receiver} 1507S/PDIF Sony/Philips Digital Interface Format 1508SA security advisory 1509SA security association 1510SA source address 1511SA structured analysis 1512SAAS software as a service 1513SABRE Semi-automated business research environment 1514SACD super audio compact disc 1515SAD security association database 1516SAF-TE SCSI accessed fault-tolerant enclosure 1517SAGE Semi-automated ground environment 1518SAL {service,system} abstraction layer 1519SAM serial access memory 1520SAM sum addressed memory 1521SAML security assertion markup language 1522SAN storage area network 1523SAP service access point 1524SAPIC streamlined advanced programmable interrupt controller 1525SASD structured analysis, structured design 1526SASI Shugart Associates System Interface 1527SASL simple authentication [and] security layer 1528SATA serial advanced technology attachment 1529SAX simple API for XML 1530SB sound blaster 1531SBI supervisor binary interface 1532SBOM Software Bill of Materials 1533SBSA server base system architecture 1534SBU standard build unit 1535SC store conditional 1536SCA source code analyzer 1537SCADA supervisory control and data acquisition 1538SCC single chip cloud 1539SCC source code control 1540SCCP skinny call control protocol 1541SCCS Source Code Control System 1542SCI scalable coherent interface 1543SCI system control interrupt 1544SCIM smart common input method 1545SCM software configuration management 1546SCM source code management 1547SCM storage-class memory 1548SCO synchronous connection orientated 1549SCP secure copy 1550SCP system control processor 1551SCPI system control and power interface 1552SCSI Small Computer System Interface 1553SCT Signed Certificate Timestamp 1554SCTP Stream Control Transmission Protocol 1555SDDC software defined data center 1556SDEI software delegated exception interface 1557SDI symbol deinterleave 1558SDK software development kit 1559SDL Simple Declarative Language 1560SDL Simple Direct-media Layer 1561SDLC {software,system,systems} development life cycle 1562SDN software defined networking 1563SDP Session Description Protocol 1564SDR software defined radio 1565SDRAM synchronous dynamic random access memory 1566SDS software defined storage 1567SDT syntax-directed translation 1568SEA synchronous external abort 1569SED self-encrypting drive 1570SED stream editor 1571SEGV segmentation violation 1572SEMB serial ATA enclosure management bridge 1573SEO search engine optimization 1574SES SCSI enclosure services 1575SFC sequential function chart 1576SFI simple firmware interface 1577SFI software fault isolation 1578SFP small form-factor pluggable 1579SFTP SSH File Transfer Protocol 1580SFTP Serial File Transfer Protocol 1581SFTP Simple File Transfer Protocol 1582SGI Silicon Graphics, Inc 1583SGI software generated interrupt 1584SGMII serial gigabit media independent interface 1585SGPIO serial general purpose input/output 1586SGRAM synchronous graphics random access memory 1587SHA secure hash algorithm 1588SICP structure and interpretation of computer programs 1589SIDH supersingular isogeny Diffie-Hellman 1590SIEM security information and event management 1591SIF source input format 1592SIFS short inter-frame space 1593SIM subscriber identity module 1594SIMD single instruction, multiple data 1595SIMM single inline memory module 1596SIP Session Initiation Protocol 1597SIPR secret IP router (network) 1598SIR signal-to-interference ratio 1599SIR slow infrared 1600SIRT security incident response team 1601SISD single instruction, single data 1602SIV synthetic initialization vector 1603SLAAC stateless address auto-configuration 1604SLC single-level cell 1605SLDRAM synchronous-link dynamic random access memory 1606SLED single large expensive disk 1607SLI scalable link interface 1608SLI scan-line interleave 1609SLIC system license internal code 1610SLOC source lines of code 1611SLRU segmented LRU 1612SMA smart memory access 1613SMAF system management action field 1614SMAP Simple Mail Access Protocol 1615SMAP supervisor mode access prevention 1616SMART self-monitoring analysis and reporting technology 1617SMB Server Message Block 1618SMB system management bus 1619SMBIOS System Management BIOS 1620SMC system management controller 1621SMD storage module device 1622SMEP supervisor mode execution protection 1623SMF single mode fiber 1624SMI structure of management information 1625SMI system management interrupt 1626SMM system management mode 1627SMP serial management protocol 1628SMP symmetric multiprocessing 1629SMR shingled magnetic recording 1630SMR state machine replication 1631SMT simultaneous multithreading 1632SMTP Simple Mail Transfer Protocol 1633SMU system management unit 1634SNA systems network architecture 1635SNAP Sub-Network Access Protocol 1636SNIA Storage Networking Industry Association 1637SNMP Simple Network Management Protocol 1638SNR signal-to-noise ratio 1639SOA service oriented architecture 1640SOAP Simple Object Access Protocol 1641SOC security operations center 1642SOC system on chip 1643SOF start of frame 1644SOH start of header 1645SOHO small office/home office 1646SOL serial over LAN 1647SOM system on module 1648SP service pack 1649SP stack pointer 1650SPA storage pool allocator 1651SPAN switched port analyzer 1652SPARC scalable processor architecture 1653SPARQL SPARQL Protocol and RDF Query Language 1654SPD security policy database 1655SPD serial presence detect 1656SPDIF Sony/Philips digital interface format 1657SPI serial peripheral interface 1658SPI stateful packet inspection 1659SPIR standard portable intermediate representation 1660SPL secondary program loader 1661SPL spinlock 1662SPL system interrupt priority level 1663SPMD single process, multiple data 1664SPR special purpose register 1665SPT sectors per track 1666SQA software quality assurance 1667SQCIF sub quarter common intermediate format 1668SQL Structured Query Language 1669SRAM static random access memory 1670SRC sample rate conversion 1671SRP SCSI RDMA protocol 1672SRR shaped round robin 1673SRS Sender Rewriting Scheme 1674SRTP Secure Real-time Transport Protocol 1675SS self-snoop 1676SS stack segment 1677SSA static single assignment 1678SSAP source service access point 1679SSB single-sideband modulation 1680SSB speculative store bypass 1681SSBB speculative store bypass barrier (Arm) 1682SSBD speculative store bypass disable (Intel) 1683SSC spread spectrum clock 1684SSD solid state drive 1685SSE streaming SIMD extensions 1686SSFDC solid state floppy disc card 1687SSH secure shell 1688SSI server side includes 1689SSID service set identifier 1690SSL secure sockets layer 1691SSP stack smashing protection 1692SSRF server-side request forgery 1693SSTP secure socket tunneling protocol 1694STC software thermal control 1695STD state transition diagram 1696STEK session ticket encryption key 1697STM software transactional memory 1698STOMP Streaming Text Oriented Messaging Protocol 1699STP Spanning Tree Protocol 1700STP shielded twisted pair 1701STRG spanning tree root guard 1702SUN Stanford University Network 1703SUS Single Unix Specification 1704SUT system under test 1705SVC switched virtual circuit 1706SVG scalable vector graphics 1707SVGA Super Video Graphics Array 1708SVI {switch,switched} virtual interface 1709SVM secure virtual machine 1710SVM support vector machine 1711SVR System V Release 1712SVS Separate Virtual Space 1713SWF Shockwave Flash 1714SWIG simplified wrapper [and] interface generator 1715SYR symbol timing recovery 1716TA test assertion 1717TA transmitter address 1718TAA transactional asynchronous abort (Intel) 1719TACACS terminal access controller access-control system 1720TAI international atomic time 1721TAO track at once 1722TAOCP The Art of Computer Programming 1723TAP Test Anything Protocol 1724TAS test and set 1725TB terabyte 1726TBNF transitional backus-naur form 1727TCB trace capture buffer 1728TCB trusted computing base 1729TCC thermal control circuit 1730TCL tool command language 1731TCP Transmission Control Protocol 1732TCQ tagged command queueing 1733TDC time [to] digital converter 1734TDD test-driven development 1735TDD time division duplex 1736TDM time division multiplexing 1737TDMA time division multiple access 1738TDOA time difference of arrival 1739TDP thermal design {point,power} 1740TDR time-domain reflectometry 1741TECO Text Editor and Corrector 1742TEE Trusted Execution Environment 1743TFT thin film transistor 1744TFTP Trivial File Transfer Protocol 1745TIAS try it and see 1746TIFF tagged image file format 1747TITS try it to see 1748TK temporal key 1749TKIP Temporal Key Integrity Protocol 1750TLA top level aggregator 1751TLB translation lookaside buffer 1752TLD top level domain 1753TLER time-limited error recovery 1754TLI transport layer interface 1755TLS thread local storage 1756TLS transport layer security 1757TLV type, length, value 1758TM Turing machine 1759TM thermal monitor 1760TMDS transition minimized differential signaling 1761TMG transmogrifier 1762TMO timeout 1763TOD time of day 1764TOE TCP offload engine 1765TOFU trust on first use 1766TOS terms of service 1767TOS trusted operating system 1768TOS type of service 1769TOTP time-based one time password 1770TP transaction processing 1771TPI tracks per inch 1772TPM transactions per minute 1773TPM trusted platform module 1774TPR task priority register 1775TPS transactions per second 1776TPS transmission parameters signaling 1777TR task register 1778TR token ring 1779TRL timing recovery loop 1780TRNG true random number generator 1781TS terminal services 1782TS time series 1783TS time stamp 1784TS transport stream 1785TSAN Thread Sanitizer 1786TSC time stamp counter 1787TSD time stamp disable 1788TSDB time series database 1789TSL test, set, lock 1790TSO TCP segmentation offload 1791TSO Total Store Ordering 1792TSO time sharing option 1793TSP Time-Stamp Protocol 1794TSP Tunnel Setup Protocol 1795TSP time synchronization protocol 1796TSP traveling salesman problem 1797TSS task state segment 1798TSV tab-separated values 1799TSX transaction synchronization extensions (Intel) 1800TTL time to live 1801TTL transistor-transistor logic 1802TTM translation table maps 1803TTY teletype 1804TU translation unit 1805TUI {terminal,text-based,textual} user interface 1806TX {transmit out,transmitter} 1807TXG transaction group 1808TZ time zone 1809UAC user {access,account} control 1810UAF use-after-free 1811UART universal asynchronous receiver/transmitter 1812UAT user acceptance testing 1813UB undefined behavior 1814UBSAN Undefined Behavior Sanitizer 1815UC uncacheable 1816UCS unified computing system 1817UCS uniform-cost search 1818UCS universal coded character set 1819UDI uniform driver interface 1820UDMA ultra DMA 1821UDO ultra density optical 1822UDP User Datagram Protocol 1823UDS Unix Domain Socket 1824UEFI unified extensible firmware interface 1825UFO UDP fragmentation offload 1826UFS Unix File System 1827UGA universal graphics adapter 1828UI unit interval 1829UI user interface 1830UICC universal integrated circuit card 1831UID unique identifier 1832UID user identifier 1833UL upload 1834ULA unique local address 1835UMA uniform memory access 1836UMA upper memory area 1837UMB upper memory block 1838UML unified modeling language 1839UMPC ultra-mobile PC 1840UPNP universal plug and play 1841UPS uninterruptible power supply 1842URI uniform resource identifier 1843URL uniform resource locator 1844URN uniform resource name 1845USART universal synchronous/asynchronous receiver/transmitter 1846USB universal serial bus 1847USWC uncacheable speculative write combining 1848UT unit test 1849UTC coordinated universal time 1850UTF unicode transformation formats 1851UTP unshielded twisted pair 1852UTS UNIX time-sharing 1853UUCP Unix-to-Unix Copy Protocol 1854UUID universally unique identifier 1855UUOC useless use of cat 1856UUT unit under test 1857UX user experience 1858VA vertical alignment 1859VA virtual address 1860VA volt-ampere 1861VAX virtual address extension 1862VB Visual Basic 1863VBR volume boot record 1864VCA variable-gain amplifier 1865VCC common collector voltage 1866VCCP virtual chassis control protocol 1867VCF voltage-controlled filter 1868VCM virtual channel memory 1869VCO voltage-controlled oscillator 1870VCP virtual chassis port 1871VCS version control system 1872VDP vulnerability disclosure policy 1873VDPAU Video Decode and Presentation API for Unix 1874VES virtual execution system 1875VESA Video Electronics Standards Association 1876VFO variable-frequency oscillator 1877VFS virtual file system 1878VG volume group 1879VGA Video Graphics Array 1880VHD virtual hard disk 1881VHDCI very high density cable interconnect 1882VID {VLAN,voltage level} identifier 1883VIM Vi IMproved 1884VIPT virtually indexed, physically tagged 1885VIVT virtually indexed, virtually tagged 1886VLAN virtual local area network 1887VLD variable-length decoding 1888VLIW very long instruction word 1889VLSI very large scale integration 1890VLSM variable length subnet mask 1891VM virtual {machine,memory} 1892VME virtual mode extension 1893VMX vector multimedia extensions 1894VMX virtual machine extensions 1895VNC virtual network computing 1896VNI virtual network identifier 1897VOD video on demand 1898VPD vital product data 1899VPN virtual private network 1900VPWS virtual private wire service 1901VR virtual reality 1902VRAM video random access memory 1903VRF virtual routing and forwarding 1904VRM voltage regulator module 1905VROC Virtual RAID On CPU 1906VRRP Virtual Router Redundancy Protocol 1907VSTP VLAN Spanning Tree Protocol 1908VTEP VXLAN tunnel endpoint 1909VTP VLAN Trunking Protocol 1910VXFS Veritas file system 1911VXLAN virtual extensible LAN 1912VXVM Veritas volume manager 1913W watt 1914W3C World Wide Web Consortium 1915WAFL write anywhere file layout 1916WAMP Web Application Messaging Protocol 1917WAN wide area network 1918WAP Wireless Application Protocol 1919WAP wireless access point 1920WDDM Windows Display Driver Model 1921WDM Wavelength Division Multiplexing 1922WDM Windows Driver Model 1923WDT watchdog timer 1924WEP Wired Equivalent Privacy 1925WFI wait for interrupt 1926WFQ weighted fair queuing 1927WH write hit 1928WHEA Windows hardware error architecture 1929WIFI wireless fidelity 1930WLAN wireless local area network 1931WM write miss 1932WMF Windows meta file 1933WMI Windows Management Instrumentation 1934WOL Wake-on-LAN 1935WOM Wake-on-Modem 1936WOR Wake-on-Ring 1937WORM write once read many 1938WP WordPerfect 1939WP word processor 1940WP write protect 1941WPA Wi-Fi Protected Access 1942WPA2 Wi-Fi Protected Access II 1943WPAD web proxy auto-discovery protocol 1944WPS Wi-Fi Protected Setup 1945WRAM window random access memory 1946WS web services 1947WTC write through caching 1948WTD weighted tail drop 1949WWAN wireless wide area network 1950WWW world wide web 1951WYSIAYG what you see is all you get 1952WYSIWYG what you see is what you get 1953XBAR crossbar 1954XDMCP X Display Manager control protocol 1955XER XML encoding rules 1956XGA Extended Graphics Array 1957XHR XMLHttpRequest 1958XIP execute in place 1959XML Extensible Markup Language 1960XMSS eXtended Merkle Signature Scheme 1961XNA XNA's not acronymed 1962XNS Xerox network systems 1963XOF eXtendable-Output Function 1964XOR exclusive or 1965XP extreme programming 1966XSI X/Open System Interface 1967XSL extensible stylesheet language 1968XSLT extensible stylesheet language transformations 1969XSS cross site scripting 1970XT extended technology 1971XTACACS extended terminal access controller access-control system 1972XTI X/Open transport interface 1973XUL XML user interface language 1974YACC yet another compiler compiler 1975YAML YAML ain't markup language 1976YANG yet another next generation 1977YAWPFAPR you are welcome; please file a problem report 1978YP Yellow Pages 1979YTD year to date 1980ZAP ZFS attribute processor 1981ZBR zone bit recording 1982ZFOD zero-filled on demand 1983ZFS zettabyte file system 1984ZIF zero insertion force 1985ZIFS zero insertion force socket 1986ZIL ZFS intent log 1987ZMA zone multicast address 1988ZOI zero one infinity 1989ZOI zone of influence 1990ZPL ZFS Posix layer 1991ZSK zone signing key 1992ZVOL ZFS Volume 1993