acronyms.comp revision 1.408
1$NetBSD: acronyms.comp,v 1.408 2025/06/10 20:22:05 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 565ELF executable and linking format 566ELS entry level system 567EMACS Editor MACroS 568EMI electro-magnetic interference 569EMP electro-magnetic pulse 570EMR electro-magnetic radiation 571EMS extended master secret (RFC7627) 572ENIAC electronic numerical integrator and computer 573EOF end of file 574EOI end of interrupt 575EOIS end of interactive support 576EOL end of life 577EOL end of line 578EOT end of transmission 579EPIC explicitly parallel instruction computing 580EPP enhanced parallel port 581EPP extensible provisioning protocol (RFC5730) 582EPRML extended partial response, maximum likelihood 583EPROM erasable programmable read only memory 584EPSS Exploit Prediction Scoring System 585EPT extended page tables 586ERC error recovery control 587ERD emergency recovery disk 588ERD entity relationship diagram 589ERE extended regular expression 590ERST error record serialization table 591ESAN Efficiency Sanitizer 592ESB enterprise service bus 593ESDI enhanced small disk interface 594ESDRAM enhanced synchronous dynamic random access memory 595ESI enclosure services interface 596ESS electronic switching system 597ESS extended service set 598ESSID extended service set identifier 599EST enhanced speedstep 600ETL extract, transform, load 601EU execution unit 602EULA end user license agreement 603EdDSA Edwards curve digital signature algorithm 604FAT file allocation table 605FBRAM frame buffer random access memory 606FCIF full common intermediate format 607FCL fiber channel loop 608FCS frame check sequence 609FDC floppy disk controller 610FDD floppy disk drive 611FDDI fiber distributed data interface 612FDE full disk encryption 613FDT flattened device tree 614FEA finite element analysis 615FEC forward error correction 616FET field-effect transistor 617FF finite field 618FF form feed 619FFDH finite-field Diffie-Hellman 620FFH functional fixed hardware 621FFI foreign function interface 622FFM focus follows mouse 623FFS Fast File System 624FFS find first set 625FFT fast Fourier transform 626FG floating gate 627FHE fully homomorphic encryption 628FHRP first hop redundancy protocol 629FHSS frequency hop spread spectrum 630FID frequency identifier 631FIFO first in, first out 632FILO first in, last out 633FIPS Federal Information Processing Standards 634FIR fast infrared 635FLOPS floating [point] operations per second 636FLOSS free/libre/open source software 637FM frequency modulation 638FMR false match rate 639FOSS free/open source software 640FPGA field programmable gate array 641FPM fast page mode 642FPR floating point register 643FPU floating point unit 644FQDN fully qualified domain name 645FRR false rejection rate 646FRR Free Range Routing 647FRU field replaceable unit 648FS file system 649FSB front side bus 650FSCK file system check 651FSF Free Software Foundation 652FSK frequency shift keying 653FSM finite-state machine 654FTA fault tree analysis 655FTL flash translation layer 656FTP File Transfer Protocol 657FTPS File Transfer Protocol Secure 658FTTH fiber to the home 659FUS fast user switching 660FWH firmware hub 661FWS folding white space 662GAL generic array logic 663GARP generic attribute registration protocol 664GAS generic address structure 665GC garbage collector 666GCC GNU Compiler Collection 667GCM Galois counter mode 668GCR group-coded recording 669GDI Graphics Device Interface 670GDT global descriptor table 671GDT (block) group descriptor table 672GECOS general comprehensive operating supervisor 673GEM graphics environment manager 674GEM graphics execution manager 675GEMM general matrix multiply 676GENA general event notification architecture 677GHC Glasgow Haskell compiler 678GHES generic hardware error source 679GIC generic interrupt controller 680GID group identifier 681GIF graphics interchange format 682GLBP gateway load balancing protocol 683GMCH graphics and memory controller hub 684GNU GNU's Not Unix 685GOP graphics output protocol 686GOT global offset table 687GPE general purpose event 688GPF general protection fault 689GPG GNU Privacy Guard 690GPL [GNU] General Public License 691GPR general purpose register 692GPS generalized processor sharing 693GPT GUID partition table 694GPU graphics processing unit 695GR golden ratio 696GRE generic routing encapsulation 697GRO generic receive offload 698GSI global system interrupt 699GSO generic send offload 700GUA global unicast address 701GUI graphical user interface 702GUID globally unique identifier 703GUS Gravis UltraSound 704GVFS git virtual file system 705HA high availability 706HAL hardware abstraction layer 707HAT hashed array tree 708HATEOAS hypermedia as the engine of application state 709HBA host bus adapter 710HBS hash-based signature 711HCC Home Cable Computer 712HCCA Home Cable Computer Adaptor 713HCF halt and catch fire 714HCI host controller interface 715HCI human-computer interaction 716HCL hardware compatibility list 717HDCP High-bandwidth Digital Content Protection 718HDD hard disk drive 719HDL hardware description language 720HDMI High-Definition Multimedia Interface 721HDTV high-definition television 722HECI host embedded controller interface 723HEST hardware error source table 724HEVC high efficiency video coding 725HF high frequency 726HFM highest frequency mode 727HFS hierarchical file system 728HID human interface device 729HKDF HMAC-based key derivation function 730HKP HTTP Keyserver Protocol 731HLE hardware lock elision (Intel) 732HLL high-level language 733HMA high memory area 734HMI human-machine interface 735HNDL harvest now, decrypt later 736HOOD hierarchical object oriented design 737HOTP HMAC-based one time password 738HP Hewlett-Packard 739HPC high performance computing 740HPD hot plug detection 741HPET high precision event timer 742HPKE hybrid public key encryption 743HQC Hamming Quasi-Cyclic 744HSM hardware security module 745HSM hierarchical storage management 746HSRP hot standby router protocol 747HT hyper-threading 748HTC hardware thermal control 749HTCC high temperature co-fired ceramic 750HTML HyperText Markup Language 751HTT hyper-threading technology 752HTTP Hypertext Transfer Protocol 753HTTPS Hypertext Transfer Protocol Secure 754HVDS High-Voltage Differential Signaling 755HVM hardware virtual machine 756HWASAN Hardware-assisted Address Sanitizer 757HZ Hertz 758I2O intelligent input/output 759IA information assurance 760IAAS infrastructure as a service 761IAB Internet Architecture Board 762IANA Internet Assigned Numbers Authority 763IBC iterated block cipher 764IBM International Business Machines 765IBPI international blinking pattern interpretation 766IBS instruction based sampling 767IBSS independent basic service set 768IBT indirect branch tracking 769IC integrated circuit 770ICA independent computer architecture 771ICACLS integrity control access control lists 772ICB Internet Citizen's Band 773ICE in-circuit emulator 774ICE internal compiler error 775ICH I/O controller hub 776ICMP Internet Control Message Protocol 777ICT information and communications technology 778ICW initialization command word 779IDA Intel dynamic acceleration 780IDCMP Intuition direct communication message port 781IDCT inverse discrete cosine transform 782IDE integrated development environment 783IDE integrated drive electronics 784IDPS intrusion detection [and] prevention system 785IDRP inter-domain routing protocol 786IDS intrusion detection system 787IDT interrupt descriptor table 788IE Internet Explorer 789IEC International Electrotechnical Commission 790IEEE Institute of Electrical and Electronics Engineers 791IESG Internet Engineering Steering Group 792IETF Internet Engineering Task Force 793IF intermediate frequency 794IFCM isochronous flow control mode 795IFF Interchange File Format 796IFS internal field separator 797IGD Internet gateway device 798IGMP Internet Group Management Protocol 799IGP interior gateway protocol 800IHV independent hardware vendor 801IKE Internet key exchange 802IKM input keying material 803ILM internal loopback mode 804ILOM integrated lights-out management 805ILP instruction level parallelism 806IM instant messaging 807IMAP Internet Message Access Protocol 808IMC integrated memory controller 809IMCR interrupt mode configuration register 810IME input method editor 811IMR interrupt mask register 812IMS information management system 813IMSI international mobile subscriber identity 814INCITS InterNational Committee for Information Technology Standards 815INODE index node 816IO input/output 817IOCTL input/output control 818IOM input/output managers 819IOMMU input/output memory management unit 820IOT Internet of Things 821IP Internet Protocol 822IP intellectual property 823IPC instructions per cycle 824IPC interprocess communication 825IPCF interprocess communication facility 826IPE integrated programming environment 827IPI intelligent peripheral interface 828IPI interprocessor interrupt 829IPL Initial Program Load 830IPL Interrupt Priority Level 831IPMB Intelligent Platform Management Bus 832IPMI Intelligent Platform Management Interface 833IPNG Internet Protocol, Next Generation 834IPS in-plane switching 835IPS intrusion prevention system 836IPSEC Internet Protocol Security 837IR intermediate representation 838IRC Internet Relay Chat 839IRDA infrared data association 840IRDP ICMP Router Discovery Protocol 841IRQ interrupt request 842IRQL interrupt request level 843IRR interrupt request register 844IRTF Internet Research Task Force 845IS information system 846ISA industry standard architecture 847ISA instruction set architecture 848ISB instruction synchronization barrier (Arm) 849ISDN integrated services digital network 850ISE instant secure erase 851ISI inter-symbol interference 852ISL initial system load 853ISM industrial, scientific, [and] medical 854ISMS information system management system 855ISN initial serial number 856ISO International Standards Organization 857ISOC Internet Society 858ISP Internet service provider 859ISR in-service register 860ISR interrupt service routine 861IST internal spanning tree 862IST interrupt stack table 863ISV independent software vendor 864IT information technology 865ITB Intel Turbo Boost 866ITIL information technology infrastructure library 867ITP in-target probe 868ITSM IT service management 869IV initialization vector 870IVT interrupt vector table 871JBOD just a bunch of disks 872JCL Job Control Language 873JFET junction [gate] field-effect transistor 874JIT just in time 875JPEG Joint Photographic Experts Group 876JRE Java Runtime Environment 877JSON JavaScript Object Notation 878JTAG joint test action group 879KASAN Kernel Address Sanitizer 880KASLR kernel address space layout randomization 881KB keyboard 882KB kilobyte 883KBD keyboard 884KBD kilobaud 885KCS keyboard controller style 886KDF key derivation function 887KEK key encryption key 888KEM key encapsulation mechanism 889KLOC thousand lines of code 890KMS kernel-mode setting 891KPI kernel programming interface 892KSK key signing key 893KVA kernel virtual address 894KVM kernel virtual machine 895KVM kernel virtual memory 896KVM keyboard, video, [and] mouse 897L2CAP link layer control and adaptation protocol 898LAG link aggregation group 899LAMP Linux Apache MySQL {Perl,PHP,Python} 900LAN local area network 901LAPIC local advanced programmable interrupt controller 902LAR load access rights 903LBA logical block addressing 904LBNF labeled backus-naur form 905LBS location-based service 906LCD liquid crystal display 907LCP link control protocol 908LDA local delivery agent 909LDAP Lightweight Directory Access Protocol 910LDR light-dependent resistor 911LDT local descriptor table 912LE logical extent 913LED light emitting diode 914LELL low energy link layer 915LER label edge router 916LF line feed 917LF low frequency 918LFM lowest frequency mode 919LFN long file names 920LFO low-frequency oscillation 921LFS log-structured file system 922LFU least frequently used 923LHP loop heat pipe 924LIF logical interchange format 925LIFO last in, first out 926LILO LInux LOader 927LILO last in, last out 928LINT local interrupt 929LIR local Internet registry 930LISP LISt Processor 931LISP Locator/ID Separation Protocol 932LKM {Linux,loadable} kernel module 933LKML Linux kernel mailing list 934LL load linked 935LL/SC load linked/store conditional 936LLC logical link control 937LLD low-level design 938LLDD low-level design document 939LLDP link layer discovery protocol 940LLF low level format 941LLMNR link-local multicast name resolution 942LLVM Low Level Virtual Machine 943LM long mode 944LMCE local machine check exception 945LMI local management interface 946LMM link management mode 947LMP link management protocol 948LMS Leighton-Micali Signature 949LNO loop nest optimization 950LOC lines of code 951LOM lights-out management 952LPC low pin count 953LPE Linux performance events 954LPS local positioning system 955LRC longitudinal redundancy check 956LRM left-to-right mark 957LRO Large Receive Offload 958LRO left-to-right override 959LRU least recently used 960LS link state 961LSAN Leak Sanitizer 962LSB Linux standards base 963LSB least significant {bit,byte} 964LSI large scale integration 965LSL load segment limit 966LSM log structured merge 967LSN Large Scale NAT 968LSN log sequence number 969LSO large send offload 970LSR label switch router 971LTCC low temperature co-fired ceramic 972LTO linear tape-open 973LTO link time optimization 974LTR left to right 975LTR letter(-sized paper) 976LTR load task register 977LTS long term support 978LUA Lua Uppercase Accident 979LUN logical unit number 980LV logical volume 981LVDS Low-Voltage Differential Signaling 982LVM logical volume management 983LVT local vector table 984LWP light-weight process 985LZSS Lempel Ziv Storer Szymanski 986LZW Lempel Ziv Welch 987MAB MAC authentication bypass 988MAC mandatory access control 989MAC message authentication {check,code} 990MAC {media,medium} access control 991MADT multiple APIC descriptor table 992MAMR microwave-assisted magnetic recording 993MB megabyte 994MBA multi-boot agent 995MBR master boot record 996MBS megabits per second 997MC memory controller 998MCA MicroChannel architecture 999MCA machine check architecture 1000MCC multiversion concurrency control 1001MCE machine check exception 1002MCGA Multi-Color Graphics Array 1003MCH memory controller hub 1004MCLAG multi-chassis link aggregation group 1005MCM multi-chip module 1006MCQ memory controlled queue 1007MD MiniDisc 1008MD machine-dependent 1009MD-SAL model-driven service abstraction layer 1010MDA Monochrome Display Adapter 1011MDA mail delivery agent 1012MDC Management Data Clock 1013MDI Medium Dependent Interface 1014MDI-X Medium Dependent Interface Crossover 1015MDIO Management Data Input/Output 1016MDMX MIPS Digital Media eXtension 1017MDRAM multibank dynamic random access memory 1018MDS microarchitectural data sampling 1019MESI modified, exclusive, shared, invalid 1020MFC Microsoft Foundation Classes 1021MFC merge from current 1022MFM modified frequency modulation 1023MFU most frequently used 1024MGCP media gateway control protocol 1025MHU message handling unit 1026MI machine interface 1027MI machine-independent 1028MIB management information base 1029MIC message integrity {check,code} 1030MID mobile Internet device 1031MIDI musical instrument digital interface 1032MIF management information format 1033MII media independent interface 1034MIM man in the middle 1035MIMD multiple instruction, multiple data 1036MIME Multipurpose Internet Mail Extensions 1037MIMO multiple input multiple output 1038MIPS Microprocessor without Interlocked Pipeline Stages 1039MIPS million instructions per second 1040MISD multiple instruction, single data 1041MIT Massachusetts Institute of Technology 1042MITM man in the middle 1043ML machine language 1044ML machine learning 1045ML mailing list 1046ML markup language 1047ML maximum likelihood 1048ML-KEM module-lattice based key-encapsulation mechanism 1049MLAG multi-chassis link aggregation group 1050MLC multi-level cell 1051MLD multicast listener discovery 1052MLHP micro loop heat pipe 1053MLIR multi-level intermediate representation 1054MLO MMC loader 1055MMC multi-media card 1056MMF multi-mode fiber 1057MMIC monolithic microwave integrated circuit 1058MMIO memory mapped input/output 1059MMORPG massive multiplayer online role playing game 1060MMRP multiple MAC registration protocol 1061MMU memory management unit 1062MMX matrix math extension 1063MMX multimedia extension 1064MMX multiple math extension 1065MO magneto-optical 1066MOESI modified, owned, exclusive, shared, invalid 1067MOF maximum operating frequency 1068MOSFET metal-oxide-semiconductor field-effect transistor 1069MOSI modified, owned, shared, invalid 1070MP multi-platform 1071MP multiplayer 1072MP {multiprocessing,multiprocessor} 1073MPEG moving picture experts group 1074MPI message passing interface 1075MPLS Multiprotocol Label Switching 1076MPP massively parallel processor 1077MPS memory pool system 1078MPS multiprocessor specification 1079MQTT Message Queuing Telemetry Transport 1080MR modem ready 1081MRO method resolution order 1082MRP multiple registration protocol 1083MRU most recently used 1084MS Microsoft 1085MSAN Memory Sanitizer 1086MSB most significant {bit,byte} 1087MSC message sequence chart 1088MSE mean square error 1089MSF minutes seconds frames 1090MSI message signaled interrupt 1091MSI modified, shared, invalid 1092MSR {machine state,model-specific} register 1093MSS maximum segment size 1094MSTP Multiple Spanning Tree Protocol 1095MT machine translation 1096MTA mail transfer agent 1097MTBF mean time between failures 1098MTP media transfer protocol 1099MTRR memory type range register 1100MTTF mean time to failure 1101MTU maximum transmission unit 1102MUA mail user agent 1103MUD multi-user domain 1104MVCC multiversion concurrency control 1105MVR multicast VLAN registration 1106MVRP multiple VLAN registration protocol 1107MWE module width encoding 1108MX mail exchange 1109MZM Majorana zero mode 1110NACK negative acknowledgement 1111NAK negative acknowledgement 1112NAN neighbor awareness networking 1113NAN not a number 1114NAPT Network Address Port Translation 1115NAS network attached storage 1116NAT network address translation 1117NAV network allocation vector 1118NC numerical control 1119NC-SI network controller sideband interface 1120NCO numerically-controlled oscillator 1121NCP Network Control Protocol 1122NCQ native command queuing 1123NCSI network connectivity status indicator 1124ND neighbor discovery 1125NDFA nondeterministic finite automaton 1126NDIS network driver interface specification 1127NE numeric error 1128NEWS Network extensible Window System 1129NFA nondeterministic finite automaton 1130NFC near-field communication 1131NFCI no functional change intended 1132NFS network file system 1133NFV network function virtualization 1134NHACP NABU HCCA Application Communication Protocol 1135NIA next instruction address 1136NIC network information center 1137NIC network interface card 1138NIDS network intrusion detection system 1139NIKE Non-Interactive Key Exchange 1140NIP network interface protocol 1141NIPR non-classified IP router (network) 1142NIPS network intrusion prevention system 1143NIS network information service 1144NIST National Institute of Standards and Technology 1145NLS native language support 1146NMI non-maskable interrupt 1147NMR nonce-misuse resistance 1148NNTP Network News Transfer Protocol 1149NOC network operations center 1150NOP no operation 1151NOS network operating system 1152NP nondeterministic polynomial time 1153NRND not recommended for new designs 1154NRZ non-return to zero 1155NSA National Security Agency 1156NSA nation-state adversary 1157NSA no such agency 1158NTA negative trust anchor 1159NTM non-deterministic Turing machine 1160NTP Network Time Protocol 1161NUMA non-uniform memory access 1162NURBS non-uniform rational basis spline 1163NVD National Vulnerability Database 1164NVMM NetBSD Virtual Machine Monitor 1165NVMM non-volatile main memory 1166NVRAM non-volatile random access memory 1167NW not write-through 1168NX no execute 1169OAEP optimal asymmetric encryption padding 1170OAM operations, administration, and {management,maintenance} 1171OBO off by one 1172OBOE off by one error 1173OCL object constraint language 1174OCR optical character recognition 1175ODBC Open Database Connectivity 1176ODCM on-demand clock modulation 1177ODE offline device environment 1178ODI open data-link interface 1179ODM object data manager 1180ODMR on-demand mail relay 1181ODT on-die termination 1182OEM original equipment manufacturer 1183OFB output feedback 1184OFDM orthogonal frequency division multiplexing 1185OFET organic field-effect transistor 1186OLAP online analytical processing 1187OLE object linking and embedding 1188OLTP online transaction processing 1189ONCE on-{chip,circuit} emulation 1190ONFI open nand flash interface 1191OO OpenOffice 1192OO object oriented 1193OOB out of band 1194OOE out of order execution 1195OOM out of memory 1196OOO OpenOffice.org 1197OOP object oriented programming 1198OOPS object oriented programming systems 1199OOSE object oriented software engineering 1200OPM operations per minute 1201OPS operations per second 1202OQL Object Query Language 1203ORB object request broker 1204ORM object-relational mapping 1205OS operating system 1206OSD object-based storage device 1207OSD open source definition 1208OSF open software foundation 1209OSI Open Source Initiative 1210OSI open systems interconnection 1211OSPF open shortest path first 1212OSPM OS power management 1213OSS open sound system 1214OSS open source software 1215OSVW operating system visible workarounds 1216OTP one time password 1217OTP open telecom platform 1218OU organizational unit 1219OUI organizationally unique identifier 1220OWASP Open Web Application Security Project 1221OWL Web Ontology Language 1222P2P PCI to PCI 1223P2P peer to peer 1224PA phase accumulator 1225PA physical address 1226PAAS platform as a service 1227PAC phase-amplitude converter 1228PAE physical address extension 1229PAGP port aggregation protocol 1230PAL phase alternating line 1231PAL programmable array logic 1232PAM pluggable authentication modules 1233PAM pulse amplitude modulation 1234PAP password authentication protocol 1235PAT page attribute table 1236PAT port address translation 1237PATA parallel ATA 1238PAX portable archive exchange 1239PBE pending break encoding 1240PBE programming by example 1241PBKDF password-based key derivation function 1242PBR partition boot record 1243PBX private branch exchange 1244PC personal computer 1245PC program counter 1246PCB Protocol Control Block 1247PCB printed circuit board 1248PCB process control block 1249PCBC propagating cipher block chaining 1250PCC Portable C Compiler 1251PCD page-level cache disable 1252PCE path computation element 1253PCE performance-monitor counter enable 1254PCEP Path Computation Element Protocol 1255PCH platform controller hub 1256PCI peripheral component interconnect 1257PCM phase change memory 1258PCM pulse code modulation 1259PCMCIA Personal Computer Memory Card International Association 1260PCP Port Control Protocol 1261PD public domain 1262PDA personal digital assistant 1263PDA pushdown automaton 1264PDAG propositional directed acyclic graph 1265PDB power distribution board 1266PDF portable document format 1267PDM pulse-duration modulation 1268PDN pull-down network 1269PDP page {descriptor,directory} page 1270PDS product data sheet 1271PDU protocol data unit 1272PE portable executable 1273PE protection enable 1274PE provider edge 1275PEAP Protected EAP 1276PECI platform environment control interface 1277PED PIN Entry Device 1278PEP protocol extension protocol 1279PER packed encoding rules 1280PFS perfect forward secrecy 1281PGAS partitioned global address space 1282PGE page global enable 1283PGO profile guided optimization 1284PGP Pretty Good Privacy 1285PHB PCI host bridge 1286PHP PHP: Hypertext Preprocessor 1287PIC performance instrumentation counters 1288PIC position independent code 1289PIC programmable interrupt controller 1290PICNIC problem in chair, not in computer 1291PID process id 1292PIE position independent executable 1293PIL Priority Interrupt Level 1294PIM personal information manager 1295PIM platform-independent model 1296PIO programmed input/output 1297PIPT physically indexed, physically tagged 1298PIQ prefetch input queue 1299PIR private information retrieval 1300PIT programmable interrupt timer 1301PIV personal identity verification 1302PIX Private Internet eXchange 1303PKCS public-key cryptography standards 1304PKE public key encryption 1305PKI public key infrastructure 1306PLC programmable logic controller 1307PLD programmable logic device 1308PLL phase locked loop 1309PLRU pseudo LRU 1310PLT procedure linkage table 1311PLTM package level thermal management 1312PM power management 1313PM {phase,pulse} modulation 1314PMC performance monitoring counters 1315PME power management event 1316PMEG page map entry group 1317PMI performance monitoring infrastructure 1318PMI platform management interrupt 1319PMIC power management integrated circuit 1320PMIO port-mapped input/output 1321PMT photo-multiplier tube 1322PMU performance monitoring units 1323PMU power management unit 1324PNG portable network graphics 1325PNP plug and play 1326POE power over ethernet 1327POF probability of failure 1328POP Post Office Protocol 1329POP power on password 1330POR plan of record 1331POSIX Portable Operating System Interface [for Unix] 1332POST power on self test 1333POTS plain old telephone system 1334POWER Performance Optimization With Enhanced RISC 1335POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1336PP pair programming 1337PPB PCI [to] PCI bridge 1338PPC Power Performance Computing 1339PPC PowerPC 1340PPI pixels per inch 1341PPM pages per minute 1342PPP Point-to-Point Protocol 1343PPPOA Point-to-Point Protocol over ATM 1344PPPOE Point-to-Point Protocol over Ethernet 1345PPR processor programming reference 1346PPT powerpoint 1347PPT punched paper tape 1348PPU physics processing unit 1349PQC post-quantum cryptography 1350PRAM Parameter RAM 1351PRBS pseudorandom bit sequence 1352PRF pseudorandom function [family] 1353PRG pseudorandom generator 1354PRML partial response, maximum likelihood 1355PRN pseudorandom {noise,number} 1356PRNG pseudorandom number generator 1357PROM programmable read only memory 1358PRP pseudorandom permutation 1359PRU Programmable Realtime Unit 1360PS PostScript 1361PSD power spectral density 1362PSE page size extensions 1363PSK phase shift keying 1364PSK pre-shared key 1365PSTN public switched telephone network 1366PSW program status word 1367PTE page table entry 1368PTLA pseudo top level aggregator 1369PTP page table page 1370PTV perceived target value 1371PU processing unit 1372PUC personal unblocking code 1373PUN physical unit number 1374PV physical volume 1375PVC permanent virtual circuit 1376PVG physical volume group 1377PVI protected-mode virtual interrupt 1378PVRST Per-VLAN rapid spanning tree 1379PVST Per-VLAN Spanning Tree 1380PWM pulse width modulation 1381PXE preboot execution environment 1382QA quality assurance 1383QAM quadrature amplitude modulation 1384QAM quality assurance management 1385QBE query by example 1386QC quality control 1387QCIF quarter common intermediate format 1388QDI quasi delay insensitive 1389QOI quality of implementation 1390QOI quick order interface 1391QOS quality of service 1392QPU quantum processing unit 1393QUIC Quick UDP Internet Connections 1394QVL qualified vendor list 1395R/O read only 1396R/W read/write 1397RA receiver address 1398RA remote assistance 1399RA resource affinity 1400RA router advertisement 1401RAD rapid application development 1402RADIUS remote authentication dial-in user service 1403RAID redundant array of {independent,inexpensive} disks 1404RAII resource acquisition is initialization 1405RAM random access memory 1406RAS reliability, availability and serviceability 1407RAS remote access service 1408RAS restartable atomic sequence 1409RAS row address strobe 1410RAT register allocation table 1411RAT remote access trojan 1412RBF radial basis function 1413RBL real-time blackhole list 1414RBL reputation block list 1415RBNF routing backus-naur form 1416RBT red-black tree 1417RC release candidate 1418RC remote control 1419RC run commands 1420RCS Revision Control System 1421RCU read, copy, update 1422RDB Rigid Disk Block 1423RDBMS relational database management system 1424RDF Resource Description Framework 1425RDM relational data model 1426RDMA remote direct memory access 1427RDP remote desktop protocol 1428RDRAM Rambus DRAM 1429RE regular expression 1430REPL read, evaluate, print, loop 1431REST representational state transfer 1432RF radio frequency 1433RFB remote frame buffer 1434RFI radio frequency interference 1435RFO request for ownership 1436RFU reserved for future use 1437RGB red green blue 1438RGBA red green blue alpha 1439RGMII reduced gigabit media independent interface 1440RH read hit 1441RHEL Red Hat Enterprise Linux 1442RHL Red Hat Linux 1443RIB routing information base 1444RIFF Resource Interchange File Format 1445RIP Raster Image Processor 1446RIP Routing Information Protocol 1447RIPR releasable IP router (network) 1448RIR regional Internet registry 1449RISC reduced instruction set {computer,computing} 1450RKM ROM Kernel Manual 1451RLE run length encoding 1452RLL run length limited 1453RLO right-to-left override 1454RM read miss 1455RMCP Remote Management Control Protocol 1456RMI remote method invocation 1457RMO Relaxed Memory Ordering 1458RMPM rapid memory power management 1459RMS root mean square 1460RMW read, modify, write 1461RNG random number generator 1462ROA route origin authorization 1463ROM read only memory 1464ROP return-oriented programming 1465RPC remote procedure call 1466RPG Report Program Generator 1467RPKI resource PKI 1468RPL requested privilege level 1469RPM revolutions per minute 1470RPN reverse Polish notation 1471RPVST Rapid Per-VLAN Spanning Tree 1472RPZ response policy zone 1473RR random replacement 1474RR resource record 1475RR round robin 1476RRSIG resource record signature 1477RS relay station 1478RSA Rivest, Shamir, [and] Adleman 1479RSC Receive Segment Coalescing 1480RSIP Realm Specific IP 1481RSN Robust Secure Network 1482RSS Receive Side Scaling 1483RSS really simple syndication 1484RSS residual sum of squares 1485RSTP Rapid Spanning Tree Protocol 1486RT real time 1487RTC real time clock 1488RTC real time computing 1489RTF rich text format 1490RTL register transfer language 1491RTL resistor-transistor logic 1492RTL right to left 1493RTM restricted transactional memory (Intel) 1494RTOS real time operating system 1495RTP Real-time Transport Protocol 1496RTS request to send 1497RTT round trip time 1498RTTI run-time type information 1499RUP rational unified process 1500RW Rabin-Williams 1501RWM read-write memory 1502RX {receive,receiver} 1503S/PDIF Sony/Philips Digital Interface Format 1504SA security advisory 1505SA security association 1506SA source address 1507SA structured analysis 1508SAAS software as a service 1509SABRE Semi-automated business research environment 1510SACD super audio compact disc 1511SAD security association database 1512SAF-TE SCSI accessed fault-tolerant enclosure 1513SAGE Semi-automated ground environment 1514SAL {service,system} abstraction layer 1515SAM serial access memory 1516SAM sum addressed memory 1517SAML security assertion markup language 1518SAN storage area network 1519SAP service access point 1520SAPIC streamlined advanced programmable interrupt controller 1521SASD structured analysis, structured design 1522SASI Shugart Associates System Interface 1523SASL simple authentication [and] security layer 1524SATA serial advanced technology attachment 1525SAX simple API for XML 1526SB sound blaster 1527SBI supervisor binary interface 1528SBOM Software Bill of Materials 1529SBSA server base system architecture 1530SBU standard build unit 1531SC store conditional 1532SCA source code analyzer 1533SCADA supervisory control and data acquisition 1534SCC single chip cloud 1535SCC source code control 1536SCCP skinny call control protocol 1537SCCS Source Code Control System 1538SCI scalable coherent interface 1539SCI system control interrupt 1540SCIM smart common input method 1541SCM software configuration management 1542SCM source code management 1543SCM storage-class memory 1544SCO synchronous connection orientated 1545SCP secure copy 1546SCP system control processor 1547SCPI system control and power interface 1548SCSI Small Computer System Interface 1549SCT Signed Certificate Timestamp 1550SCTP Stream Control Transmission Protocol 1551SDDC software defined data center 1552SDEI software delegated exception interface 1553SDI symbol deinterleave 1554SDK software development kit 1555SDL Simple Declarative Language 1556SDL Simple Direct-media Layer 1557SDLC {software,system,systems} development life cycle 1558SDN software defined networking 1559SDP Session Description Protocol 1560SDR software defined radio 1561SDRAM synchronous dynamic random access memory 1562SDS software defined storage 1563SDT syntax-directed translation 1564SEA synchronous external abort 1565SED self-encrypting drive 1566SED stream editor 1567SEGV segmentation violation 1568SEMB serial ATA enclosure management bridge 1569SEO search engine optimization 1570SES SCSI enclosure services 1571SFC sequential function chart 1572SFI simple firmware interface 1573SFI software fault isolation 1574SFP small form-factor pluggable 1575SFTP SSH File Transfer Protocol 1576SFTP Serial File Transfer Protocol 1577SFTP Simple File Transfer Protocol 1578SGI Silicon Graphics, Inc 1579SGI software generated interrupt 1580SGMII serial gigabit media independent interface 1581SGPIO serial general purpose input/output 1582SGRAM synchronous graphics random access memory 1583SHA secure hash algorithm 1584SICP structure and interpretation of computer programs 1585SIDH supersingular isogeny Diffie-Hellman 1586SIEM security information and event management 1587SIF source input format 1588SIFS short inter-frame space 1589SIM subscriber identity module 1590SIMD single instruction, multiple data 1591SIMM single inline memory module 1592SIP Session Initiation Protocol 1593SIPR secret IP router (network) 1594SIR signal-to-interference ratio 1595SIR slow infrared 1596SIRT security incident response team 1597SISD single instruction, single data 1598SIV synthetic intialization vector 1599SLAAC stateless address auto-configuration 1600SLC single-level cell 1601SLDRAM synchronous-link dynamic random access memory 1602SLED single large expensive disk 1603SLI scalable link interface 1604SLI scan-line interleave 1605SLIC system license internal code 1606SLOC source lines of code 1607SLRU segmented LRU 1608SMA smart memory access 1609SMAF system management action field 1610SMAP Simple Mail Access Protocol 1611SMAP supervisor mode access prevention 1612SMART self-monitoring analysis and reporting technology 1613SMB Server Message Block 1614SMB system management bus 1615SMBIOS System Management BIOS 1616SMC system management controller 1617SMD storage module device 1618SMEP supervisor mode execution protection 1619SMF single mode fiber 1620SMI structure of management information 1621SMI system management interrupt 1622SMM system management mode 1623SMP serial management protocol 1624SMP symmetric multiprocessing 1625SMR shingled magnetic recording 1626SMR state machine replication 1627SMT simultaneous multithreading 1628SMTP Simple Mail Transfer Protocol 1629SMU system management unit 1630SNA systems network architecture 1631SNAP Sub-Network Access Protocol 1632SNIA Storage Networking Industry Association 1633SNMP Simple Network Management Protocol 1634SNR signal-to-noise ratio 1635SOA service oriented architecture 1636SOAP Simple Object Access Protocol 1637SOC security operations center 1638SOC system on chip 1639SOF start of frame 1640SOH start of header 1641SOHO small office/home office 1642SOL serial over LAN 1643SOM system on module 1644SP service pack 1645SP stack pointer 1646SPA storage pool allocator 1647SPAN switched port analyzer 1648SPARC scalable processor architecture 1649SPARQL SPARQL Protocol and RDF Query Language 1650SPD security policy database 1651SPD serial presence detect 1652SPDIF Sony/Philips digital interface format 1653SPI serial peripheral interface 1654SPI stateful packet inspection 1655SPIR standard portable intermediate representation 1656SPL secondary program loader 1657SPL spinlock 1658SPL system interrupt priority level 1659SPMD single process, multiple data 1660SPR special purpose register 1661SPT sectors per track 1662SQA software quality assurance 1663SQCIF sub quarter common intermediate format 1664SQL Structured Query Language 1665SRAM static random access memory 1666SRC sample rate conversion 1667SRP SCSI RDMA protocol 1668SRR shaped round robin 1669SRS Sender Rewriting Scheme 1670SRTP Secure Real-time Transport Protocol 1671SS self-snoop 1672SS stack segment 1673SSA static single assignment 1674SSAP source service access point 1675SSB single-sideband modulation 1676SSB speculative store bypass 1677SSBB speculative store bypass barrier (Arm) 1678SSBD speculative store bypass disable (Intel) 1679SSC spread spectrum clock 1680SSD solid state drive 1681SSE streaming SIMD extensions 1682SSFDC solid state floppy disc card 1683SSH secure shell 1684SSI server side includes 1685SSID service set identifier 1686SSL secure sockets layer 1687SSP stack smashing protection 1688SSRF server-side request forgery 1689SSTP secure socket tunneling protocol 1690STC software thermal control 1691STD state transition diagram 1692STEK session ticket encryption key 1693STM software transactional memory 1694STOMP Streaming Text Oriented Messaging Protocol 1695STP Spanning Tree Protocol 1696STP shielded twisted pair 1697STRG spanning tree root guard 1698SUN Stanford University Network 1699SUS Single Unix Specification 1700SUT system under test 1701SVC switched virtual circuit 1702SVG scalable vector graphics 1703SVGA Super Video Graphics Array 1704SVI {switch,switched} virtual interface 1705SVM secure virtual machine 1706SVM support vector machine 1707SVR System V Release 1708SVS Separate Virtual Space 1709SWF Shockwave Flash 1710SWIG simplified wrapper [and] interface generator 1711SYR symbol timing recovery 1712TA test assertion 1713TA transmitter address 1714TAA transactional asynchronous abort (Intel) 1715TACACS terminal access controller access-control system 1716TAI international atomic time 1717TAO track at once 1718TAOCP The Art of Computer Programming 1719TAP Test Anything Protocol 1720TAS test and set 1721TB terabyte 1722TBNF transitional backus-naur form 1723TCB trace capture buffer 1724TCB trusted computing base 1725TCC thermal control circuit 1726TCL tool command language 1727TCP Transmission Control Protocol 1728TCQ tagged command queueing 1729TDC time [to] digital converter 1730TDD test-driven development 1731TDD time division duplex 1732TDM time division multiplexing 1733TDMA time division multiple access 1734TDOA time difference of arrival 1735TDP thermal design {point,power} 1736TDR time-domain reflectometry 1737TECO Text Editor and Corrector 1738TEE Trusted Execution Environment 1739TFT thin film transistor 1740TFTP Trivial File Transfer Protocol 1741TIAS try it and see 1742TIFF tagged image file format 1743TITS try it to see 1744TK temporal key 1745TKIP Temporal Key Integrity Protocol 1746TLA top level aggregator 1747TLB translation lookaside buffer 1748TLD top level domain 1749TLER time-limited error recovery 1750TLI transport layer interface 1751TLS thread local storage 1752TLS transport layer security 1753TLV type, length, value 1754TM Turing machine 1755TM thermal monitor 1756TMDS transition minimized differential signaling 1757TMG transmogrifier 1758TMO timeout 1759TOD time of day 1760TOE TCP offload engine 1761TOFU trust on first use 1762TOS terms of service 1763TOS trusted operating system 1764TOS type of service 1765TOTP time-based one time password 1766TP transaction processing 1767TPI tracks per inch 1768TPM transactions per minute 1769TPM trusted platform module 1770TPR task priority register 1771TPS transactions per second 1772TPS transmission parameters signaling 1773TR task register 1774TR token ring 1775TRL timing recovery loop 1776TRNG true random number generator 1777TS terminal services 1778TS time series 1779TS time stamp 1780TS transport stream 1781TSAN Thread Sanitizer 1782TSC time stamp counter 1783TSD time stamp disable 1784TSDB time series database 1785TSL test, set, lock 1786TSO TCP segmentation offload 1787TSO Total Store Ordering 1788TSO time sharing option 1789TSP Time-Stamp Protocol 1790TSP Tunnel Setup Protocol 1791TSP time synchronization protocol 1792TSP traveling salesman problem 1793TSS task state segment 1794TSV tab-separated values 1795TSX transaction synchronization extensions (Intel) 1796TTL time to live 1797TTL transistor-transistor logic 1798TTM translation table maps 1799TTY teletype 1800TU translation unit 1801TUI {terminal,text-based,textual} user interface 1802TX {transmit out,transmitter} 1803TXG transaction group 1804TZ time zone 1805UAC user {access,account} control 1806UAF use-after-free 1807UART universal asynchronous receiver/transmitter 1808UAT user acceptance testing 1809UB undefined behavior 1810UBSAN Undefined Behavior Sanitizer 1811UC uncacheable 1812UCS unified computing system 1813UCS uniform-cost search 1814UCS universal coded character set 1815UDI uniform driver interface 1816UDMA ultra DMA 1817UDO ultra density optical 1818UDP User Datagram Protocol 1819UDS Unix Domain Socket 1820UEFI unified extensible firmware interface 1821UFO UDP fragmentation offload 1822UFS Unix File System 1823UGA universal graphics adapter 1824UI unit interval 1825UI user interface 1826UICC universal integrated circuit card 1827UID unique identifier 1828UID user identifier 1829UL upload 1830ULA unique local address 1831UMA uniform memory access 1832UMA upper memory area 1833UMB upper memory block 1834UML unified modeling language 1835UMPC ultra-mobile PC 1836UPNP universal plug and play 1837UPS uninterruptible power supply 1838URI uniform resource identifier 1839URL uniform resource locator 1840URN uniform resource name 1841USART universal synchronous/asynchronous receiver/transmitter 1842USB universal serial bus 1843USWC uncacheable speculative write combining 1844UT unit test 1845UTC coordinated universal time 1846UTF unicode transformation formats 1847UTP unshielded twisted pair 1848UTS UNIX time-sharing 1849UUCP Unix-to-Unix Copy Protocol 1850UUID universally unique identifier 1851UUOC useless use of cat 1852UUT unit under test 1853UX user experience 1854VA vertical alignment 1855VA virtual address 1856VA volt-ampere 1857VAX virtual address extension 1858VB Visual Basic 1859VBR volume boot record 1860VCA variable-gain amplifier 1861VCC common collector voltage 1862VCCP virtual chassis control protocol 1863VCF voltage-controlled filter 1864VCM virtual channel memory 1865VCO voltage-controlled oscillator 1866VCP virtual chassis port 1867VCS version control system 1868VDP vulnerability disclosure policy 1869VDPAU Video Decode and Presentation API for Unix 1870VES virtual execution system 1871VESA Video Electronics Standards Association 1872VFO variable-frequency oscillator 1873VFS virtual file system 1874VG volume group 1875VGA Video Graphics Array 1876VHD virtual hard disk 1877VHDCI very high density cable interconnect 1878VID {VLAN,voltage level} identifier 1879VIM Vi IMproved 1880VIPT virtually indexed, physically tagged 1881VIVT virtually indexed, virtually tagged 1882VLAN virtual local area network 1883VLD variable-length decoding 1884VLIW very long instruction word 1885VLSI very large scale integration 1886VLSM variable length subnet mask 1887VM virtual {machine,memory} 1888VME virtual mode extension 1889VMX vector multimedia extensions 1890VMX virtual machine extensions 1891VNC virtual network computing 1892VNI virtual network identifier 1893VOD video on demand 1894VPD vital product data 1895VPN virtual private network 1896VPWS virtual private wire service 1897VR virtual reality 1898VRAM video random access memory 1899VRF virtual routing and forwarding 1900VRM voltage regulator module 1901VROC Virtual RAID On CPU 1902VRRP Virtual Router Redundancy Protocol 1903VSTP VLAN Spanning Tree Protocol 1904VTEP VXLAN tunnel endpoint 1905VTP VLAN Trunking Protocol 1906VXFS Veritas file system 1907VXLAN virtual extensible LAN 1908VXVM Veritas volume manager 1909W watt 1910W3C World Wide Web Consortium 1911WAFL write anywhere file layout 1912WAMP Web Application Messaging Protocol 1913WAN wide area network 1914WAP Wireless Application Protocol 1915WAP wireless access point 1916WDDM Windows Display Driver Model 1917WDM Wavelength Division Multiplexing 1918WDM Windows Driver Model 1919WDT watchdog timer 1920WEP Wired Equivalent Privacy 1921WFI wait for interrupt 1922WFQ weighted fair queuing 1923WH write hit 1924WHEA Windows hardware error architecture 1925WIFI wireless fidelity 1926WLAN wireless local area network 1927WM write miss 1928WMF Windows meta file 1929WMI Windows Management Instrumentation 1930WOL Wake-on-LAN 1931WOM Wake-on-Modem 1932WOR Wake-on-Ring 1933WORM write once read many 1934WP WordPerfect 1935WP word processor 1936WP write protect 1937WPA Wi-Fi Protected Access 1938WPA2 Wi-Fi Protected Access II 1939WPAD web proxy auto-discovery protocol 1940WPS Wi-Fi Protected Setup 1941WRAM window random access memory 1942WS web services 1943WTC write through caching 1944WTD weighted tail drop 1945WWAN wireless wide area network 1946WWW world wide web 1947WYSIAYG what you see is all you get 1948WYSIWYG what you see is what you get 1949XBAR crossbar 1950XDMCP X Display Manager control protocol 1951XER XML encoding rules 1952XGA Extended Graphics Array 1953XHR XMLHttpRequest 1954XIP execute in place 1955XML Extensible Markup Language 1956XMSS eXtended Merkle Signature Scheme 1957XNA XNA's not acronymed 1958XNS Xerox network systems 1959XOF eXtendable-Output Function 1960XOR exclusive or 1961XP extreme programming 1962XSI X/Open System Interface 1963XSL extensible stylesheet language 1964XSLT extensible stylesheet language transformations 1965XSS cross site scripting 1966XT extended technology 1967XTACACS extended terminal access controller access-control system 1968XTI X/Open transport interface 1969XUL XML user interface language 1970YACC yet another compiler compiler 1971YAML YAML ain't markup language 1972YANG yet another next generation 1973YAWPFAPR you are welcome; please file a problem report 1974YP Yellow Pages 1975YTD year to date 1976ZAP ZFS attribute processor 1977ZBR zone bit recording 1978ZFOD zero-filled on demand 1979ZFS zettabyte file system 1980ZIF zero insertion force 1981ZIFS zero insertion force socket 1982ZIL ZFS intent log 1983ZMA zone multicast address 1984ZOI zero one infinity 1985ZOI zone of influence 1986ZPL ZFS Posix layer 1987ZSK zone signing key 1988ZVOL ZFS Volume 1989