acronyms.comp revision 1.411
1$NetBSD: acronyms.comp,v 1.411 2025/07/11 22:19:53 andvar 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 606FBRAM frame buffer random access memory 607FCIF full common intermediate format 608FCL fiber channel loop 609FCS frame check sequence 610FDC floppy disk controller 611FDD floppy disk drive 612FDDI fiber distributed data interface 613FDE full disk encryption 614FDT flattened device tree 615FEA finite element analysis 616FEC forward error correction 617FET field-effect transistor 618FF finite field 619FF form feed 620FFDH finite-field Diffie-Hellman 621FFH functional fixed hardware 622FFI foreign function interface 623FFM focus follows mouse 624FFS Fast File System 625FFS find first set 626FFT fast Fourier transform 627FG floating gate 628FHE fully homomorphic encryption 629FHRP first hop redundancy protocol 630FHSS frequency hop spread spectrum 631FID frequency identifier 632FIFO first in, first out 633FILO first in, last out 634FIPS Federal Information Processing Standards 635FIR fast infrared 636FLOPS floating [point] operations per second 637FLOSS free/libre/open source software 638FM frequency modulation 639FMR false match rate 640FOSS free/open source software 641FPGA field programmable gate array 642FPM fast page mode 643FPR floating point register 644FPU floating point unit 645FQDN fully qualified domain name 646FRR false rejection rate 647FRR Free Range Routing 648FRU field replaceable unit 649FS file system 650FSB front side bus 651FSCK file system check 652FSF Free Software Foundation 653FSK frequency shift keying 654FSM finite-state machine 655FTA fault tree analysis 656FTL flash translation layer 657FTP File Transfer Protocol 658FTPS File Transfer Protocol Secure 659FTTH fiber to the home 660FUS fast user switching 661FWH firmware hub 662FWS folding white space 663GAL generic array logic 664GARP generic attribute registration protocol 665GAS generic address structure 666GC garbage collector 667GCC GNU Compiler Collection 668GCM Galois counter mode 669GCR group-coded recording 670GDI Graphics Device Interface 671GDT global descriptor table 672GDT (block) group descriptor table 673GECOS general comprehensive operating supervisor 674GEM graphics environment manager 675GEM graphics execution manager 676GEMM general matrix multiply 677GENA general event notification architecture 678GHC Glasgow Haskell compiler 679GHES generic hardware error source 680GIC generic interrupt controller 681GID group identifier 682GIF graphics interchange format 683GLBP gateway load balancing protocol 684GMCH graphics and memory controller hub 685GNU GNU's Not Unix 686GOP graphics output protocol 687GOT global offset table 688GPE general purpose event 689GPF general protection fault 690GPG GNU Privacy Guard 691GPL [GNU] General Public License 692GPR general purpose register 693GPS generalized processor sharing 694GPT GUID partition table 695GPU graphics processing unit 696GR golden ratio 697GRE generic routing encapsulation 698GRO generic receive offload 699GSI global system interrupt 700GSO generic send offload 701GUA global unicast address 702GUI graphical user interface 703GUID globally unique identifier 704GUS Gravis UltraSound 705GVFS git virtual file system 706HA high availability 707HAL hardware abstraction layer 708HAT hashed array tree 709HATEOAS hypermedia as the engine of application state 710HBA host bus adapter 711HBS hash-based signature 712HCC Home Cable Computer 713HCCA Home Cable Computer Adaptor 714HCF halt and catch fire 715HCI host controller interface 716HCI human-computer interaction 717HCL hardware compatibility list 718HDCP High-bandwidth Digital Content Protection 719HDD hard disk drive 720HDL hardware description language 721HDMI High-Definition Multimedia Interface 722HDTV high-definition television 723HECI host embedded controller interface 724HEST hardware error source table 725HEVC high efficiency video coding 726HF high frequency 727HFM highest frequency mode 728HFS hierarchical file system 729HID human interface device 730HKDF HMAC-based key derivation function 731HKP HTTP Keyserver Protocol 732HLE hardware lock elision (Intel) 733HLL high-level language 734HMA high memory area 735HMI human-machine interface 736HNDL harvest now, decrypt later 737HOOD hierarchical object oriented design 738HOTP HMAC-based one time password 739HP Hewlett-Packard 740HPC high performance computing 741HPD hot plug detection 742HPET high precision event timer 743HPKE hybrid public key encryption 744HQC Hamming Quasi-Cyclic 745HSM hardware security module 746HSM hierarchical storage management 747HSRP hot standby router protocol 748HT hyper-threading 749HTC hardware thermal control 750HTCC high temperature co-fired ceramic 751HTML HyperText Markup Language 752HTT hyper-threading technology 753HTTP Hypertext Transfer Protocol 754HTTPS Hypertext Transfer Protocol Secure 755HVDS High-Voltage Differential Signaling 756HVM hardware virtual machine 757HWASAN Hardware-assisted Address Sanitizer 758HZ Hertz 759I2O intelligent input/output 760IA information assurance 761IAAS infrastructure as a service 762IAB Internet Architecture Board 763IANA Internet Assigned Numbers Authority 764IBC iterated block cipher 765IBM International Business Machines 766IBPI international blinking pattern interpretation 767IBS instruction based sampling 768IBSS independent basic service set 769IBT indirect branch tracking 770IC integrated circuit 771ICA independent computer architecture 772ICACLS integrity control access control lists 773ICB Internet Citizen's Band 774ICE in-circuit emulator 775ICE internal compiler error 776ICH I/O controller hub 777ICMP Internet Control Message Protocol 778ICT information and communications technology 779ICW initialization command word 780IDA Intel dynamic acceleration 781IDCMP Intuition direct communication message port 782IDCT inverse discrete cosine transform 783IDE integrated development environment 784IDE integrated drive electronics 785IDPS intrusion detection [and] prevention system 786IDRP inter-domain routing protocol 787IDS intrusion detection system 788IDT interrupt descriptor table 789IE Internet Explorer 790IEC International Electrotechnical Commission 791IEEE Institute of Electrical and Electronics Engineers 792IESG Internet Engineering Steering Group 793IETF Internet Engineering Task Force 794IF intermediate frequency 795IFCM isochronous flow control mode 796IFF Interchange File Format 797IFS internal field separator 798IGD Internet gateway device 799IGMP Internet Group Management Protocol 800IGP interior gateway protocol 801IHV independent hardware vendor 802IKE Internet key exchange 803IKM input keying material 804ILM internal loopback mode 805ILOM integrated lights-out management 806ILP instruction level parallelism 807IM instant messaging 808IMAP Internet Message Access Protocol 809IMC integrated memory controller 810IMCR interrupt mode configuration register 811IME input method editor 812IMR interrupt mask register 813IMS information management system 814IMSI international mobile subscriber identity 815INCITS InterNational Committee for Information Technology Standards 816INODE index node 817IO input/output 818IOCTL input/output control 819IOM input/output managers 820IOMMU input/output memory management unit 821IOT Internet of Things 822IP Internet Protocol 823IP intellectual property 824IPC instructions per cycle 825IPC interprocess communication 826IPCF interprocess communication facility 827IPE integrated programming environment 828IPI intelligent peripheral interface 829IPI interprocessor interrupt 830IPL Initial Program Load 831IPL Interrupt Priority Level 832IPMB Intelligent Platform Management Bus 833IPMI Intelligent Platform Management Interface 834IPNG Internet Protocol, Next Generation 835IPS in-plane switching 836IPS intrusion prevention system 837IPSEC Internet Protocol Security 838IR intermediate representation 839IRC Internet Relay Chat 840IRDA infrared data association 841IRDP ICMP Router Discovery Protocol 842IRQ interrupt request 843IRQL interrupt request level 844IRR interrupt request register 845IRTF Internet Research Task Force 846IS information system 847ISA industry standard architecture 848ISA instruction set architecture 849ISB instruction synchronization barrier (Arm) 850ISDN integrated services digital network 851ISE instant secure erase 852ISI inter-symbol interference 853ISL initial system load 854ISM industrial, scientific, [and] medical 855ISMS information system management system 856ISN initial serial number 857ISO International Standards Organization 858ISOC Internet Society 859ISP Internet service provider 860ISR in-service register 861ISR interrupt service routine 862IST internal spanning tree 863IST interrupt stack table 864ISV independent software vendor 865IT information technology 866ITB Intel Turbo Boost 867ITIL information technology infrastructure library 868ITP in-target probe 869ITSM IT service management 870IV initialization vector 871IVT interrupt vector table 872JBOD just a bunch of disks 873JCL Job Control Language 874JFET junction [gate] field-effect transistor 875JIT just in time 876JPEG Joint Photographic Experts Group 877JRE Java Runtime Environment 878JSON JavaScript Object Notation 879JTAG joint test action group 880KASAN Kernel Address Sanitizer 881KASLR kernel address space layout randomization 882KB keyboard 883KB kilobyte 884KBD keyboard 885KBD kilobaud 886KCS keyboard controller style 887KDF key derivation function 888KEK key encryption key 889KEM key encapsulation mechanism 890KLOC thousand lines of code 891KMS kernel-mode setting 892KPI kernel programming interface 893KSK key signing key 894KVA kernel virtual address 895KVM kernel virtual machine 896KVM kernel virtual memory 897KVM keyboard, video, [and] mouse 898L2CAP link layer control and adaptation protocol 899LAG link aggregation group 900LAMP Linux Apache MySQL {Perl,PHP,Python} 901LAN local area network 902LAPIC local advanced programmable interrupt controller 903LAR load access rights 904LBA logical block addressing 905LBNF labeled backus-naur form 906LBS location-based service 907LCD liquid crystal display 908LCP link control protocol 909LDA local delivery agent 910LDAP Lightweight Directory Access Protocol 911LDR light-dependent resistor 912LDT local descriptor table 913LE logical extent 914LED light emitting diode 915LELL low energy link layer 916LER label edge router 917LF line feed 918LF low frequency 919LFM lowest frequency mode 920LFN long file names 921LFO low-frequency oscillation 922LFS log-structured file system 923LFU least frequently used 924LHP loop heat pipe 925LIF logical interchange format 926LIFO last in, first out 927LILO LInux LOader 928LILO last in, last out 929LINT local interrupt 930LIR local Internet registry 931LISP LISt Processor 932LISP Locator/ID Separation Protocol 933LKM {Linux,loadable} kernel module 934LKML Linux kernel mailing list 935LL load linked 936LL/SC load linked/store conditional 937LLC logical link control 938LLD low-level design 939LLDD low-level design document 940LLDP link layer discovery protocol 941LLF low level format 942LLMNR link-local multicast name resolution 943LLVM Low Level Virtual Machine 944LM long mode 945LMCE local machine check exception 946LMI local management interface 947LMM link management mode 948LMP link management protocol 949LMS Leighton-Micali Signature 950LNO loop nest optimization 951LOC lines of code 952LOM lights-out management 953LPC low pin count 954LPE Linux performance events 955LPS local positioning system 956LRC longitudinal redundancy check 957LRM left-to-right mark 958LRO Large Receive Offload 959LRO left-to-right override 960LRU least recently used 961LS link state 962LSAN Leak Sanitizer 963LSB Linux standards base 964LSB least significant {bit,byte} 965LSI large scale integration 966LSL load segment limit 967LSM log structured merge 968LSN Large Scale NAT 969LSN log sequence number 970LSO large send offload 971LSR label switch router 972LTCC low temperature co-fired ceramic 973LTO linear tape-open 974LTO link time optimization 975LTR left to right 976LTR letter(-sized paper) 977LTR load task register 978LTS long term support 979LUA Lua Uppercase Accident 980LUN logical unit number 981LV logical volume 982LVDS Low-Voltage Differential Signaling 983LVM logical volume management 984LVT local vector table 985LWP light-weight process 986LZSS Lempel Ziv Storer Szymanski 987LZW Lempel Ziv Welch 988MAB MAC authentication bypass 989MAC mandatory access control 990MAC message authentication {check,code} 991MAC {media,medium} access control 992MADT multiple APIC descriptor table 993MAMR microwave-assisted magnetic recording 994MB megabyte 995MBA multi-boot agent 996MBR master boot record 997MBS megabits per second 998MC memory controller 999MCA MicroChannel architecture 1000MCA machine check architecture 1001MCC multiversion concurrency control 1002MCE machine check exception 1003MCGA Multi-Color Graphics Array 1004MCH memory controller hub 1005MCLAG multi-chassis link aggregation group 1006MCM multi-chip module 1007MCQ memory controlled queue 1008MD MiniDisc 1009MD machine-dependent 1010MD-SAL model-driven service abstraction layer 1011MDA Monochrome Display Adapter 1012MDA mail delivery agent 1013MDC Management Data Clock 1014MDI Medium Dependent Interface 1015MDI-X Medium Dependent Interface Crossover 1016MDIO Management Data Input/Output 1017MDMX MIPS Digital Media eXtension 1018MDRAM multibank dynamic random access memory 1019MDS microarchitectural data sampling 1020MESI modified, exclusive, shared, invalid 1021MFC Microsoft Foundation Classes 1022MFC merge from current 1023MFM modified frequency modulation 1024MFU most frequently used 1025MGCP media gateway control protocol 1026MHU message handling unit 1027MI machine interface 1028MI machine-independent 1029MIB management information base 1030MIC message integrity {check,code} 1031MID mobile Internet device 1032MIDI musical instrument digital interface 1033MIF management information format 1034MII media independent interface 1035MIM man in the middle 1036MIMD multiple instruction, multiple data 1037MIME Multipurpose Internet Mail Extensions 1038MIMO multiple input multiple output 1039MIPS Microprocessor without Interlocked Pipeline Stages 1040MIPS million instructions per second 1041MISD multiple instruction, single data 1042MIT Massachusetts Institute of Technology 1043MITM man in the middle 1044ML machine language 1045ML machine learning 1046ML mailing list 1047ML markup language 1048ML maximum likelihood 1049ML-KEM module-lattice based key-encapsulation mechanism 1050MLAG multi-chassis link aggregation group 1051MLC multi-level cell 1052MLD multicast listener discovery 1053MLHP micro loop heat pipe 1054MLIR multi-level intermediate representation 1055MLO MMC loader 1056MMC multi-media card 1057MMF multi-mode fiber 1058MMIC monolithic microwave integrated circuit 1059MMIO memory mapped input/output 1060MMORPG massive multiplayer online role playing game 1061MMRP multiple MAC registration protocol 1062MMU memory management unit 1063MMX matrix math extension 1064MMX multimedia extension 1065MMX multiple math extension 1066MO magneto-optical 1067MOESI modified, owned, exclusive, shared, invalid 1068MOF maximum operating frequency 1069MOSFET metal-oxide-semiconductor field-effect transistor 1070MOSI modified, owned, shared, invalid 1071MP multi-platform 1072MP multiplayer 1073MP {multiprocessing,multiprocessor} 1074MPEG moving picture experts group 1075MPI message passing interface 1076MPLS Multiprotocol Label Switching 1077MPP massively parallel processor 1078MPS memory pool system 1079MPS multiprocessor specification 1080MQTT Message Queuing Telemetry Transport 1081MR modem ready 1082MRO method resolution order 1083MRP multiple registration protocol 1084MRU most recently used 1085MS Microsoft 1086MSAN Memory Sanitizer 1087MSB most significant {bit,byte} 1088MSC message sequence chart 1089MSE mean square error 1090MSF minutes seconds frames 1091MSI message signaled interrupt 1092MSI modified, shared, invalid 1093MSR {machine state,model-specific} register 1094MSS maximum segment size 1095MSTP Multiple Spanning Tree Protocol 1096MT machine translation 1097MTA mail transfer agent 1098MTBF mean time between failures 1099MTP media transfer protocol 1100MTRR memory type range register 1101MTTF mean time to failure 1102MTU maximum transmission unit 1103MUA mail user agent 1104MUD multi-user domain 1105MVCC multiversion concurrency control 1106MVR multicast VLAN registration 1107MVRP multiple VLAN registration protocol 1108MWE module width encoding 1109MX mail exchange 1110MZM Majorana zero mode 1111NACK negative acknowledgement 1112NAK negative acknowledgement 1113NAN neighbor awareness networking 1114NAN not a number 1115NAPT Network Address Port Translation 1116NAS network attached storage 1117NAT network address translation 1118NAV network allocation vector 1119NC numerical control 1120NC-SI network controller sideband interface 1121NCO numerically-controlled oscillator 1122NCP Network Control Protocol 1123NCQ native command queuing 1124NCSI network connectivity status indicator 1125ND neighbor discovery 1126NDFA nondeterministic finite automaton 1127NDIS network driver interface specification 1128NE numeric error 1129NEWS Network extensible Window System 1130NFA nondeterministic finite automaton 1131NFC near-field communication 1132NFCI no functional change intended 1133NFS network file system 1134NFV network function virtualization 1135NHACP NABU HCCA Application Communication Protocol 1136NIA next instruction address 1137NIC network information center 1138NIC network interface card 1139NIDS network intrusion detection system 1140NIKE Non-Interactive Key Exchange 1141NIP network interface protocol 1142NIPR non-classified IP router (network) 1143NIPS network intrusion prevention system 1144NIS network information service 1145NIST National Institute of Standards and Technology 1146NLS native language support 1147NMI non-maskable interrupt 1148NMR nonce-misuse resistance 1149NNTP Network News Transfer Protocol 1150NOC network operations center 1151NOP no operation 1152NOS network operating system 1153NP nondeterministic polynomial time 1154NRND not recommended for new designs 1155NRZ non-return to zero 1156NSA National Security Agency 1157NSA nation-state adversary 1158NSA no such agency 1159NTA negative trust anchor 1160NTM non-deterministic Turing machine 1161NTP Network Time Protocol 1162NUMA non-uniform memory access 1163NURBS non-uniform rational basis spline 1164NVD National Vulnerability Database 1165NVMM NetBSD Virtual Machine Monitor 1166NVMM non-volatile main memory 1167NVRAM non-volatile random access memory 1168NW not write-through 1169NX no execute 1170OAEP optimal asymmetric encryption padding 1171OAM operations, administration, and {management,maintenance} 1172OBO off by one 1173OBOE off by one error 1174OCL object constraint language 1175OCR optical character recognition 1176ODBC Open Database Connectivity 1177ODCM on-demand clock modulation 1178ODE offline device environment 1179ODI open data-link interface 1180ODM object data manager 1181ODMR on-demand mail relay 1182ODT on-die termination 1183OEM original equipment manufacturer 1184OFB output feedback 1185OFDM orthogonal frequency division multiplexing 1186OFET organic field-effect transistor 1187OLAP online analytical processing 1188OLE object linking and embedding 1189OLTP online transaction processing 1190ONCE on-{chip,circuit} emulation 1191ONFI open nand flash interface 1192OO OpenOffice 1193OO object oriented 1194OOB out of band 1195OOE out of order execution 1196OOM out of memory 1197OOO OpenOffice.org 1198OOP object oriented programming 1199OOPS object oriented programming systems 1200OOSE object oriented software engineering 1201OPM operations per minute 1202OPS operations per second 1203OQL Object Query Language 1204ORB object request broker 1205ORM object-relational mapping 1206OS operating system 1207OSD object-based storage device 1208OSD open source definition 1209OSF open software foundation 1210OSI Open Source Initiative 1211OSI open systems interconnection 1212OSPF open shortest path first 1213OSPM OS power management 1214OSS open sound system 1215OSS open source software 1216OSVW operating system visible workarounds 1217OTP one time password 1218OTP open telecom platform 1219OU organizational unit 1220OUI organizationally unique identifier 1221OWASP Open Web Application Security Project 1222OWL Web Ontology Language 1223P2P PCI to PCI 1224P2P peer to peer 1225PA phase accumulator 1226PA physical address 1227PAAS platform as a service 1228PAC phase-amplitude converter 1229PAE physical address extension 1230PAGP port aggregation protocol 1231PAL phase alternating line 1232PAL programmable array logic 1233PAM pluggable authentication modules 1234PAM pulse amplitude modulation 1235PAP password authentication protocol 1236PAT page attribute table 1237PAT port address translation 1238PATA parallel ATA 1239PAX portable archive exchange 1240PBE pending break encoding 1241PBE programming by example 1242PBKDF password-based key derivation function 1243PBR partition boot record 1244PBX private branch exchange 1245PC personal computer 1246PC program counter 1247PCB Protocol Control Block 1248PCB printed circuit board 1249PCB process control block 1250PCBC propagating cipher block chaining 1251PCC Portable C Compiler 1252PCD page-level cache disable 1253PCE path computation element 1254PCE performance-monitor counter enable 1255PCEP Path Computation Element Protocol 1256PCH platform controller hub 1257PCI peripheral component interconnect 1258PCM phase change memory 1259PCM pulse code modulation 1260PCMCIA Personal Computer Memory Card International Association 1261PCP Port Control Protocol 1262PCR Platform Configuration Register 1263PD public domain 1264PDA personal digital assistant 1265PDA pushdown automaton 1266PDAG propositional directed acyclic graph 1267PDB power distribution board 1268PDF portable document format 1269PDM pulse-duration modulation 1270PDN pull-down network 1271PDP page {descriptor,directory} page 1272PDS product data sheet 1273PDU protocol data unit 1274PE portable executable 1275PE protection enable 1276PE provider edge 1277PEAP Protected EAP 1278PECI platform environment control interface 1279PED PIN Entry Device 1280PEP protocol extension protocol 1281PER packed encoding rules 1282PFS perfect forward secrecy 1283PGAS partitioned global address space 1284PGE page global enable 1285PGO profile guided optimization 1286PGP Pretty Good Privacy 1287PHB PCI host bridge 1288PHP PHP: Hypertext Preprocessor 1289PIC performance instrumentation counters 1290PIC position independent code 1291PIC programmable interrupt controller 1292PICNIC problem in chair, not in computer 1293PID process id 1294PIE position independent executable 1295PIL Priority Interrupt Level 1296PIM personal information manager 1297PIM platform-independent model 1298PIO programmed input/output 1299PIPT physically indexed, physically tagged 1300PIQ prefetch input queue 1301PIR private information retrieval 1302PIT programmable interrupt timer 1303PIV personal identity verification 1304PIX Private Internet eXchange 1305PKCS public-key cryptography standards 1306PKE public key encryption 1307PKI public key infrastructure 1308PLC programmable logic controller 1309PLD programmable logic device 1310PLL phase locked loop 1311PLRU pseudo LRU 1312PLT procedure linkage table 1313PLTM package level thermal management 1314PM power management 1315PM {phase,pulse} modulation 1316PMC performance monitoring counters 1317PME power management event 1318PMEG page map entry group 1319PMI performance monitoring infrastructure 1320PMI platform management interrupt 1321PMIC power management integrated circuit 1322PMIO port-mapped input/output 1323PMT photo-multiplier tube 1324PMU performance monitoring units 1325PMU power management unit 1326PNG portable network graphics 1327PNP plug and play 1328POE power over ethernet 1329POF probability of failure 1330POP Post Office Protocol 1331POP power on password 1332POR plan of record 1333POSIX Portable Operating System Interface [for Unix] 1334POST power on self test 1335POTS plain old telephone system 1336POWER Performance Optimization With Enhanced RISC 1337POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1338PP pair programming 1339PPB PCI [to] PCI bridge 1340PPC Power Performance Computing 1341PPC PowerPC 1342PPI pixels per inch 1343PPM pages per minute 1344PPP Point-to-Point Protocol 1345PPPOA Point-to-Point Protocol over ATM 1346PPPOE Point-to-Point Protocol over Ethernet 1347PPR processor programming reference 1348PPT powerpoint 1349PPT punched paper tape 1350PPU physics processing unit 1351PQC post-quantum cryptography 1352PRAM Parameter RAM 1353PRBS pseudorandom bit sequence 1354PRF pseudorandom function [family] 1355PRG pseudorandom generator 1356PRML partial response, maximum likelihood 1357PRN pseudorandom {noise,number} 1358PRNG pseudorandom number generator 1359PROM programmable read only memory 1360PRP pseudorandom permutation 1361PRU Programmable Realtime Unit 1362PS PostScript 1363PSD power spectral density 1364PSE page size extensions 1365PSK phase shift keying 1366PSK pre-shared key 1367PSTN public switched telephone network 1368PSW program status word 1369PTE page table entry 1370PTLA pseudo top level aggregator 1371PTP page table page 1372PTV perceived target value 1373PU processing unit 1374PUC personal unblocking code 1375PUN physical unit number 1376PV physical volume 1377PVC permanent virtual circuit 1378PVG physical volume group 1379PVI protected-mode virtual interrupt 1380PVRST Per-VLAN rapid spanning tree 1381PVST Per-VLAN Spanning Tree 1382PWM pulse width modulation 1383PXE preboot execution environment 1384QA quality assurance 1385QAM quadrature amplitude modulation 1386QAM quality assurance management 1387QBE query by example 1388QC quality control 1389QCIF quarter common intermediate format 1390QDI quasi delay insensitive 1391QOI quality of implementation 1392QOI quick order interface 1393QOS quality of service 1394QPU quantum processing unit 1395QUIC Quick UDP Internet Connections 1396QVL qualified vendor list 1397R/O read only 1398R/W read/write 1399RA receiver address 1400RA remote assistance 1401RA resource affinity 1402RA router advertisement 1403RAD rapid application development 1404RADIUS remote authentication dial-in user service 1405RAID redundant array of {independent,inexpensive} disks 1406RAII resource acquisition is initialization 1407RAM random access memory 1408RAS reliability, availability and serviceability 1409RAS remote access service 1410RAS restartable atomic sequence 1411RAS row address strobe 1412RAT register allocation table 1413RAT remote access trojan 1414RBF radial basis function 1415RBL real-time blackhole list 1416RBL reputation block list 1417RBNF routing backus-naur form 1418RBT red-black tree 1419RC release candidate 1420RC remote control 1421RC run commands 1422RCS Revision Control System 1423RCU read, copy, update 1424RDB Rigid Disk Block 1425RDBMS relational database management system 1426RDF Resource Description Framework 1427RDM relational data model 1428RDMA remote direct memory access 1429RDP remote desktop protocol 1430RDRAM Rambus DRAM 1431RE regular expression 1432REPL read, evaluate, print, loop 1433REST representational state transfer 1434RF radio frequency 1435RFB remote frame buffer 1436RFI radio frequency interference 1437RFO request for ownership 1438RFU reserved for future use 1439RGB red green blue 1440RGBA red green blue alpha 1441RGMII reduced gigabit media independent interface 1442RH read hit 1443RHEL Red Hat Enterprise Linux 1444RHL Red Hat Linux 1445RIB routing information base 1446RIFF Resource Interchange File Format 1447RIP Raster Image Processor 1448RIP Routing Information Protocol 1449RIPR releasable IP router (network) 1450RIR regional Internet registry 1451RISC reduced instruction set {computer,computing} 1452RKM ROM Kernel Manual 1453RLE run length encoding 1454RLL run length limited 1455RLO right-to-left override 1456RM read miss 1457RMCP Remote Management Control Protocol 1458RMI remote method invocation 1459RMO Relaxed Memory Ordering 1460RMPM rapid memory power management 1461RMS root mean square 1462RMW read, modify, write 1463RNG random number generator 1464ROA route origin authorization 1465ROM read only memory 1466ROP return-oriented programming 1467RPC remote procedure call 1468RPG Report Program Generator 1469RPKI resource PKI 1470RPL requested privilege level 1471RPM revolutions per minute 1472RPN reverse Polish notation 1473RPVST Rapid Per-VLAN Spanning Tree 1474RPZ response policy zone 1475RR random replacement 1476RR resource record 1477RR round robin 1478RRSIG resource record signature 1479RS relay station 1480RSA Rivest, Shamir, [and] Adleman 1481RSC Receive Segment Coalescing 1482RSIP Realm Specific IP 1483RSN Robust Secure Network 1484RSS Receive Side Scaling 1485RSS really simple syndication 1486RSS residual sum of squares 1487RSTP Rapid Spanning Tree Protocol 1488RT real time 1489RTC real time clock 1490RTC real time computing 1491RTF rich text format 1492RTL register transfer language 1493RTL resistor-transistor logic 1494RTL right to left 1495RTM restricted transactional memory (Intel) 1496RTOS real time operating system 1497RTP Real-time Transport Protocol 1498RTS request to send 1499RTT round trip time 1500RTTI run-time type information 1501RUP rational unified process 1502RW Rabin-Williams 1503RWM read-write memory 1504RX {receive,receiver} 1505S/PDIF Sony/Philips Digital Interface Format 1506SA security advisory 1507SA security association 1508SA source address 1509SA structured analysis 1510SAAS software as a service 1511SABRE Semi-automated business research environment 1512SACD super audio compact disc 1513SAD security association database 1514SAF-TE SCSI accessed fault-tolerant enclosure 1515SAGE Semi-automated ground environment 1516SAL {service,system} abstraction layer 1517SAM serial access memory 1518SAM sum addressed memory 1519SAML security assertion markup language 1520SAN storage area network 1521SAP service access point 1522SAPIC streamlined advanced programmable interrupt controller 1523SASD structured analysis, structured design 1524SASI Shugart Associates System Interface 1525SASL simple authentication [and] security layer 1526SATA serial advanced technology attachment 1527SAX simple API for XML 1528SB sound blaster 1529SBI supervisor binary interface 1530SBOM Software Bill of Materials 1531SBSA server base system architecture 1532SBU standard build unit 1533SC store conditional 1534SCA source code analyzer 1535SCADA supervisory control and data acquisition 1536SCC single chip cloud 1537SCC source code control 1538SCCP skinny call control protocol 1539SCCS Source Code Control System 1540SCI scalable coherent interface 1541SCI system control interrupt 1542SCIM smart common input method 1543SCM software configuration management 1544SCM source code management 1545SCM storage-class memory 1546SCO synchronous connection orientated 1547SCP secure copy 1548SCP system control processor 1549SCPI system control and power interface 1550SCSI Small Computer System Interface 1551SCT Signed Certificate Timestamp 1552SCTP Stream Control Transmission Protocol 1553SDDC software defined data center 1554SDEI software delegated exception interface 1555SDI symbol deinterleave 1556SDK software development kit 1557SDL Simple Declarative Language 1558SDL Simple Direct-media Layer 1559SDLC {software,system,systems} development life cycle 1560SDN software defined networking 1561SDP Session Description Protocol 1562SDR software defined radio 1563SDRAM synchronous dynamic random access memory 1564SDS software defined storage 1565SDT syntax-directed translation 1566SEA synchronous external abort 1567SED self-encrypting drive 1568SED stream editor 1569SEGV segmentation violation 1570SEMB serial ATA enclosure management bridge 1571SEO search engine optimization 1572SES SCSI enclosure services 1573SFC sequential function chart 1574SFI simple firmware interface 1575SFI software fault isolation 1576SFP small form-factor pluggable 1577SFTP SSH File Transfer Protocol 1578SFTP Serial File Transfer Protocol 1579SFTP Simple File Transfer Protocol 1580SGI Silicon Graphics, Inc 1581SGI software generated interrupt 1582SGMII serial gigabit media independent interface 1583SGPIO serial general purpose input/output 1584SGRAM synchronous graphics random access memory 1585SHA secure hash algorithm 1586SICP structure and interpretation of computer programs 1587SIDH supersingular isogeny Diffie-Hellman 1588SIEM security information and event management 1589SIF source input format 1590SIFS short inter-frame space 1591SIM subscriber identity module 1592SIMD single instruction, multiple data 1593SIMM single inline memory module 1594SIP Session Initiation Protocol 1595SIPR secret IP router (network) 1596SIR signal-to-interference ratio 1597SIR slow infrared 1598SIRT security incident response team 1599SISD single instruction, single data 1600SIV synthetic initialization vector 1601SLAAC stateless address auto-configuration 1602SLC single-level cell 1603SLDRAM synchronous-link dynamic random access memory 1604SLED single large expensive disk 1605SLI scalable link interface 1606SLI scan-line interleave 1607SLIC system license internal code 1608SLOC source lines of code 1609SLRU segmented LRU 1610SMA smart memory access 1611SMAF system management action field 1612SMAP Simple Mail Access Protocol 1613SMAP supervisor mode access prevention 1614SMART self-monitoring analysis and reporting technology 1615SMB Server Message Block 1616SMB system management bus 1617SMBIOS System Management BIOS 1618SMC system management controller 1619SMD storage module device 1620SMEP supervisor mode execution protection 1621SMF single mode fiber 1622SMI structure of management information 1623SMI system management interrupt 1624SMM system management mode 1625SMP serial management protocol 1626SMP symmetric multiprocessing 1627SMR shingled magnetic recording 1628SMR state machine replication 1629SMT simultaneous multithreading 1630SMTP Simple Mail Transfer Protocol 1631SMU system management unit 1632SNA systems network architecture 1633SNAP Sub-Network Access Protocol 1634SNIA Storage Networking Industry Association 1635SNMP Simple Network Management Protocol 1636SNR signal-to-noise ratio 1637SOA service oriented architecture 1638SOAP Simple Object Access Protocol 1639SOC security operations center 1640SOC system on chip 1641SOF start of frame 1642SOH start of header 1643SOHO small office/home office 1644SOL serial over LAN 1645SOM system on module 1646SP service pack 1647SP stack pointer 1648SPA storage pool allocator 1649SPAN switched port analyzer 1650SPARC scalable processor architecture 1651SPARQL SPARQL Protocol and RDF Query Language 1652SPD security policy database 1653SPD serial presence detect 1654SPDIF Sony/Philips digital interface format 1655SPI serial peripheral interface 1656SPI stateful packet inspection 1657SPIR standard portable intermediate representation 1658SPL secondary program loader 1659SPL spinlock 1660SPL system interrupt priority level 1661SPMD single process, multiple data 1662SPR special purpose register 1663SPT sectors per track 1664SQA software quality assurance 1665SQCIF sub quarter common intermediate format 1666SQL Structured Query Language 1667SRAM static random access memory 1668SRC sample rate conversion 1669SRP SCSI RDMA protocol 1670SRR shaped round robin 1671SRS Sender Rewriting Scheme 1672SRTP Secure Real-time Transport Protocol 1673SS self-snoop 1674SS stack segment 1675SSA static single assignment 1676SSAP source service access point 1677SSB single-sideband modulation 1678SSB speculative store bypass 1679SSBB speculative store bypass barrier (Arm) 1680SSBD speculative store bypass disable (Intel) 1681SSC spread spectrum clock 1682SSD solid state drive 1683SSE streaming SIMD extensions 1684SSFDC solid state floppy disc card 1685SSH secure shell 1686SSI server side includes 1687SSID service set identifier 1688SSL secure sockets layer 1689SSP stack smashing protection 1690SSRF server-side request forgery 1691SSTP secure socket tunneling protocol 1692STC software thermal control 1693STD state transition diagram 1694STEK session ticket encryption key 1695STM software transactional memory 1696STOMP Streaming Text Oriented Messaging Protocol 1697STP Spanning Tree Protocol 1698STP shielded twisted pair 1699STRG spanning tree root guard 1700SUN Stanford University Network 1701SUS Single Unix Specification 1702SUT system under test 1703SVC switched virtual circuit 1704SVG scalable vector graphics 1705SVGA Super Video Graphics Array 1706SVI {switch,switched} virtual interface 1707SVM secure virtual machine 1708SVM support vector machine 1709SVR System V Release 1710SVS Separate Virtual Space 1711SWF Shockwave Flash 1712SWIG simplified wrapper [and] interface generator 1713SYR symbol timing recovery 1714TA test assertion 1715TA transmitter address 1716TAA transactional asynchronous abort (Intel) 1717TACACS terminal access controller access-control system 1718TAI international atomic time 1719TAO track at once 1720TAOCP The Art of Computer Programming 1721TAP Test Anything Protocol 1722TAS test and set 1723TB terabyte 1724TBNF transitional backus-naur form 1725TCB trace capture buffer 1726TCB trusted computing base 1727TCC thermal control circuit 1728TCL tool command language 1729TCP Transmission Control Protocol 1730TCQ tagged command queueing 1731TDC time [to] digital converter 1732TDD test-driven development 1733TDD time division duplex 1734TDM time division multiplexing 1735TDMA time division multiple access 1736TDOA time difference of arrival 1737TDP thermal design {point,power} 1738TDR time-domain reflectometry 1739TECO Text Editor and Corrector 1740TEE Trusted Execution Environment 1741TFT thin film transistor 1742TFTP Trivial File Transfer Protocol 1743TIAS try it and see 1744TIFF tagged image file format 1745TITS try it to see 1746TK temporal key 1747TKIP Temporal Key Integrity Protocol 1748TLA top level aggregator 1749TLB translation lookaside buffer 1750TLD top level domain 1751TLER time-limited error recovery 1752TLI transport layer interface 1753TLS thread local storage 1754TLS transport layer security 1755TLV type, length, value 1756TM Turing machine 1757TM thermal monitor 1758TMDS transition minimized differential signaling 1759TMG transmogrifier 1760TMO timeout 1761TOD time of day 1762TOE TCP offload engine 1763TOFU trust on first use 1764TOS terms of service 1765TOS trusted operating system 1766TOS type of service 1767TOTP time-based one time password 1768TP transaction processing 1769TPI tracks per inch 1770TPM transactions per minute 1771TPM trusted platform module 1772TPR task priority register 1773TPS transactions per second 1774TPS transmission parameters signaling 1775TR task register 1776TR token ring 1777TRL timing recovery loop 1778TRNG true random number generator 1779TS terminal services 1780TS time series 1781TS time stamp 1782TS transport stream 1783TSAN Thread Sanitizer 1784TSC time stamp counter 1785TSD time stamp disable 1786TSDB time series database 1787TSL test, set, lock 1788TSO TCP segmentation offload 1789TSO Total Store Ordering 1790TSO time sharing option 1791TSP Time-Stamp Protocol 1792TSP Tunnel Setup Protocol 1793TSP time synchronization protocol 1794TSP traveling salesman problem 1795TSS task state segment 1796TSV tab-separated values 1797TSX transaction synchronization extensions (Intel) 1798TTL time to live 1799TTL transistor-transistor logic 1800TTM translation table maps 1801TTY teletype 1802TU translation unit 1803TUI {terminal,text-based,textual} user interface 1804TX {transmit out,transmitter} 1805TXG transaction group 1806TZ time zone 1807UAC user {access,account} control 1808UAF use-after-free 1809UART universal asynchronous receiver/transmitter 1810UAT user acceptance testing 1811UB undefined behavior 1812UBSAN Undefined Behavior Sanitizer 1813UC uncacheable 1814UCS unified computing system 1815UCS uniform-cost search 1816UCS universal coded character set 1817UDI uniform driver interface 1818UDMA ultra DMA 1819UDO ultra density optical 1820UDP User Datagram Protocol 1821UDS Unix Domain Socket 1822UEFI unified extensible firmware interface 1823UFO UDP fragmentation offload 1824UFS Unix File System 1825UGA universal graphics adapter 1826UI unit interval 1827UI user interface 1828UICC universal integrated circuit card 1829UID unique identifier 1830UID user identifier 1831UL upload 1832ULA unique local address 1833UMA uniform memory access 1834UMA upper memory area 1835UMB upper memory block 1836UML unified modeling language 1837UMPC ultra-mobile PC 1838UPNP universal plug and play 1839UPS uninterruptible power supply 1840URI uniform resource identifier 1841URL uniform resource locator 1842URN uniform resource name 1843USART universal synchronous/asynchronous receiver/transmitter 1844USB universal serial bus 1845USWC uncacheable speculative write combining 1846UT unit test 1847UTC coordinated universal time 1848UTF unicode transformation formats 1849UTP unshielded twisted pair 1850UTS UNIX time-sharing 1851UUCP Unix-to-Unix Copy Protocol 1852UUID universally unique identifier 1853UUOC useless use of cat 1854UUT unit under test 1855UX user experience 1856VA vertical alignment 1857VA virtual address 1858VA volt-ampere 1859VAX virtual address extension 1860VB Visual Basic 1861VBR volume boot record 1862VCA variable-gain amplifier 1863VCC common collector voltage 1864VCCP virtual chassis control protocol 1865VCF voltage-controlled filter 1866VCM virtual channel memory 1867VCO voltage-controlled oscillator 1868VCP virtual chassis port 1869VCS version control system 1870VDP vulnerability disclosure policy 1871VDPAU Video Decode and Presentation API for Unix 1872VES virtual execution system 1873VESA Video Electronics Standards Association 1874VFO variable-frequency oscillator 1875VFS virtual file system 1876VG volume group 1877VGA Video Graphics Array 1878VHD virtual hard disk 1879VHDCI very high density cable interconnect 1880VID {VLAN,voltage level} identifier 1881VIM Vi IMproved 1882VIPT virtually indexed, physically tagged 1883VIVT virtually indexed, virtually tagged 1884VLAN virtual local area network 1885VLD variable-length decoding 1886VLIW very long instruction word 1887VLSI very large scale integration 1888VLSM variable length subnet mask 1889VM virtual {machine,memory} 1890VME virtual mode extension 1891VMX vector multimedia extensions 1892VMX virtual machine extensions 1893VNC virtual network computing 1894VNI virtual network identifier 1895VOD video on demand 1896VPD vital product data 1897VPN virtual private network 1898VPWS virtual private wire service 1899VR virtual reality 1900VRAM video random access memory 1901VRF virtual routing and forwarding 1902VRM voltage regulator module 1903VROC Virtual RAID On CPU 1904VRRP Virtual Router Redundancy Protocol 1905VSTP VLAN Spanning Tree Protocol 1906VTEP VXLAN tunnel endpoint 1907VTP VLAN Trunking Protocol 1908VXFS Veritas file system 1909VXLAN virtual extensible LAN 1910VXVM Veritas volume manager 1911W watt 1912W3C World Wide Web Consortium 1913WAFL write anywhere file layout 1914WAMP Web Application Messaging Protocol 1915WAN wide area network 1916WAP Wireless Application Protocol 1917WAP wireless access point 1918WDDM Windows Display Driver Model 1919WDM Wavelength Division Multiplexing 1920WDM Windows Driver Model 1921WDT watchdog timer 1922WEP Wired Equivalent Privacy 1923WFI wait for interrupt 1924WFQ weighted fair queuing 1925WH write hit 1926WHEA Windows hardware error architecture 1927WIFI wireless fidelity 1928WLAN wireless local area network 1929WM write miss 1930WMF Windows meta file 1931WMI Windows Management Instrumentation 1932WOL Wake-on-LAN 1933WOM Wake-on-Modem 1934WOR Wake-on-Ring 1935WORM write once read many 1936WP WordPerfect 1937WP word processor 1938WP write protect 1939WPA Wi-Fi Protected Access 1940WPA2 Wi-Fi Protected Access II 1941WPAD web proxy auto-discovery protocol 1942WPS Wi-Fi Protected Setup 1943WRAM window random access memory 1944WS web services 1945WTC write through caching 1946WTD weighted tail drop 1947WWAN wireless wide area network 1948WWW world wide web 1949WYSIAYG what you see is all you get 1950WYSIWYG what you see is what you get 1951XBAR crossbar 1952XDMCP X Display Manager control protocol 1953XER XML encoding rules 1954XGA Extended Graphics Array 1955XHR XMLHttpRequest 1956XIP execute in place 1957XML Extensible Markup Language 1958XMSS eXtended Merkle Signature Scheme 1959XNA XNA's not acronymed 1960XNS Xerox network systems 1961XOF eXtendable-Output Function 1962XOR exclusive or 1963XP extreme programming 1964XSI X/Open System Interface 1965XSL extensible stylesheet language 1966XSLT extensible stylesheet language transformations 1967XSS cross site scripting 1968XT extended technology 1969XTACACS extended terminal access controller access-control system 1970XTI X/Open transport interface 1971XUL XML user interface language 1972YACC yet another compiler compiler 1973YAML YAML ain't markup language 1974YANG yet another next generation 1975YAWPFAPR you are welcome; please file a problem report 1976YP Yellow Pages 1977YTD year to date 1978ZAP ZFS attribute processor 1979ZBR zone bit recording 1980ZFOD zero-filled on demand 1981ZFS zettabyte file system 1982ZIF zero insertion force 1983ZIFS zero insertion force socket 1984ZIL ZFS intent log 1985ZMA zone multicast address 1986ZOI zero one infinity 1987ZOI zone of influence 1988ZPL ZFS Posix layer 1989ZSK zone signing key 1990ZVOL ZFS Volume 1991