acronyms.comp revision 1.367
1$NetBSD: acronyms.comp,v 1.367 2023/09/20 15:22:41 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 71APFS Apple file system 72API application programming interface 73APEI ACPI platform error interface 74APIC advanced programmable interrupt controller 75APIPA automatic private IP addressing 76APM advanced power management 77APM application performance management 78APU accelerated processing unit 79APT advanced persistent threat 80AQM active queue management 81ARAT always running APIC timer 82ARC adaptive replacement cache 83ARC Advanced RISC Computing 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 address space register 108ASR Apple software restore 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 162BMP basic multilingual plane 163BMP bitmap image file 164BMIC bus master interface controller 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 200BTC bit test [and] complement 201BTM bus transport mechanism 202BTR bit test [and] reset 203BTS bit test [and] set 204BTS bug tracking system 205BW bandwidth 206BWM block-write mode 207BUAG big ugly ASCII graphic 208CA certificate authority 209CAC cryptographic access control 210CACLS change access control lists 211CAD computer-aided design 212CAM computer assisted manufacturing 213CAM conditional access module 214CAM content addressable memory 215CAN controller area network 216CARP Common Address Redundancy Protocol 217CAS column address strobe 218CAS compare and swap 219CAS computer algebra system 220CASE computer aided software engineering 221CAU control access unit 222CAV constant angular velocity 223CBC cipher block chaining 224CBR constant bit rate 225CC carbon copy 226CCC Chaos Computer Club 227CCD charge coupled device 228CCI co-channel interferer 229CCNUMA cache-coherent non-uniform memory access 230CCTL command completion time limit 231CD cache disable 232CD compact disc 233CDDA compact disc digital audio 234CDL compiler description language 235CDMA code division multiple access 236CDN content delivery network 237CDP Cisco Discovery Protocol 238CDRAM cache dynamic random access memory 239CER canonical encoding rules 240CERT computer emergency response team 241CE customer edge 242CF compact flash 243CFB cipher feedback 244CFG context-free grammar 245CFG control-flow graph 246CFI control-flow integrity 247CG control gate 248CGA Color Graphics Adapter 249CGI common gateway interface 250CGN Carrier-Grade NAT 251CHAP Challenge-Handshake Authentication Protocol 252CHFS chip file system 253CHS cylinder/head/sector 254CI continuous integration 255CI {common,component} interface 256CIA confidentiality, integrity, availability 257CIDR Classless Inter-Domain Routing 258CIF common intermediate format 259CIFS Common Internet File System 260CIL common intermediate language 261CIR carrier-to-interference ratio 262CIS contact image sensor 263CISC complex instruction set {computer,computing} 264CJK Chinese, Japanese, [and] Korean 265CLF common log format 266CLI command line interface 267CLI common language infrastructure 268CLR common language runtime 269CLS common language specification 270CLTT closed loop thermal throttling 271CLUT color look-up table 272CLV constant linear velocity 273CM configuration management 274CMA concert multithread architecture 275CMC chassis management controller 276CMC corrected machine check 277CMC certificate management over CMS 278CMS {configuration,content,course} management system 279CMS cryptographic message syntax 280CMI control {management,method} interface 281CMOS complementary metal-oxide-semiconductor 282CMP chip multi-processing 283CMS content management system 284CMYK cyan magenta yellow black 285CN {common,canonical} name 286CNA CVE Numbering Authority 287CNC computer numerical control 288CNR carrier-to-noise ratio 289COA change of authority 290COF current operating frequency 291COFDM coded orthogonal frequency division multiplexing 292COFF common object file format 293COM component object model 294COM computer on module 295COMA cache-only memory architecture 296CORBA common object request broker architecture 297COS class of service 298COW copy-on-write 299CP continuous pilot 300CPA chosen-plaintext attack 301CPB core performance boost 302CPC central processor complex 303CPC cpu performance counters 304CPE common phase error 305CPE common platform enumeration 306CPER common platform error record 307CPG clock pulse generator 308CPI cycles per instruction 309CPL current privilege level 310CPLD complex programmable logic device 311CPP C preprocessor 312CPS characters per second 313CPS continuation-passing style 314CPT command pass through 315CPU central processing unit 316CR carriage return 317CRC cyclic redundancy check 318CRDT conflict-free replicated data type 319CRL carrier recovery loop 320CRQC cryptanalytically relevant quantum computer 321CRLF carriage return line feed 322CSIRT computer security incident response team 323CSPM cloud security posture management 324CSU C start up 325CRT cathode ray tube 326CRTP curiously recurring template pattern 327CRUD create, read, update, and delete 328CS cable select 329CS chip select 330CS code segment 331CS computer science 332CSDL {common,conceptual} schema definition language 333CSI channel state information 334CSI common system interface 335CSMA carrier sense multiple access 336CSMA/CA carrier sense multiple access with collision avoidance 337CSMA/CD carrier sense multiple access with collision detection 338CSP communicating sequential processes 339CSP content security policy 340CSP constrain satisfaction problems 341CSP cryptographic service provider 342CSR control [and] status registers 343CSRG Computer Systems Research Group 344CSS cascading style sheets 345CST common spanning tree 346CSV comma-separated values 347CTF compact c type format 348CTM close to metal 349CTR counter [mode] 350CTS clear to send 351CTS common type system 352CUA common user access 353CUT coordinated universal time 354CV control voltage 355CVE common vulnerabilities and exposures 356CVS Concurrent Versions System 357DA destination address 358DAA distributed application architecture 359DAAP digital audio access protocol 360DAB digital audio broadcasting 361DAC digital [to] analog converter 362DAC discretionary access control 363DAD duplicate address detection 364DAE deterministic authenticated encryption 365DANE DNS-based Authentication of Named Entities 366DAO disk at once 367DAP Directory Access Protocol 368DAT digital audio tape 369DAT dynamic acceleration technology 370DB database 371DBA database administrator 372DBA dynamic bandwidth allocation 373DBB data bus buffer 374DBC design by contract 375DBL dynamic buffer limiting 376DBMS database management system 377DBS database server 378DC data center 379DC direct current 380DCC Direct Client-to-Client 381DCC direct cable connect 382DCD data carrier detect 383DCE data control equipment 384DCE distributed computing environment 385DCIM data center infrastructure management 386DCIM digital camera images 387DCL Digital Command Language 388DCOM distributed component object model 389DCOP Desktop COmmunication Protocol 390DCS data collection systems 391DCT discrete cosine transform 392DCU data cache unit 393DDC display data channel 394DDE dynamic data exchange 395DDI device drivers interface 396DDK device driver kit 397DDL data description language 398DDR double data rate 399DDS direct digital sound 400DDWG Digital Display Working Group 401DE debugging extensions 402DE desktop environment 403DEA data encryption algorithm 404DEC Digital Equipment Corporation 405DEK data encryption key 406DEP data execution prevention 407DER distinguished encoding rules 408DES Data Encryption Standard 409DF don't fragment 410DFA deterministic finite automaton 411DFC data flow control 412DFS depth first search 413DFS distributed file system 414DFSAN Data Flow Sanitizer 415DFT diagnostic function test 416DFT discrete Fourier transform 417DGL data generation language 418DGEMM double precision general matrix multiply 419DH Diffie-Hellman 420DHCP Dynamic Host Configuration Protocol 421DIA dedicated Internet access 422DIB device independent bitmap 423DIFS distributed inter-frame space 424DIMM dual inline memory module 425DIRT design in real time 426DKI driver/kernel interface 427DL diode logic 428DL discrete logarithm 429DL download 430DLCI data link connection identifier 431DLE data link escape 432DLL dynamic link library 433DLNA digital living network alliance 434DLP discrete logarithm problem 435DMA direct memory access 436DMI desktop management interface 437DMS document management system 438DMT discrete multitone modulation 439DMU data management layer 440DNARD Digital network appliance reference design 441DND drag and drop 442DNLC directory name lookup cache 443DNS Domain Name System 444DNSBL Domain Name System Block List 445DNSSEC DNS Security Extensions 446DOE distributed object environment 447DOF data over fibre 448DOM document object model 449DOS denial of service 450DOS disk operating system 451DP DisplayPort 452DPAA data path acceleration architecture 453DPC deferred procedure call 454DPCM differential pulse code modulation 455DPD dead peer detection 456DPDK data plane development kit 457DPI deep packet inspection 458DPI dots per inch 459DPL descriptor privilege level 460DPS Display PostScript 461DPST display power savings technology 462DRAAS disaster recovery as a service 463DRAM dynamic random access memory 464DRBG deterministic random bit generator 465DRI direct rendering infrastructure 466DRM digital rights management 467DRM direct rendering manager 468DRRS display refresh rate switching 469DS debug store 470DS differentiated services 471DS9000 DeathStation 9000 472DS9K DeathStation 9000 473DSA digital signature algorithm 474DSAP destination service access point 475DSB double-sideband modulation 476DSCP differentiated services code point 477DSDT differentiated system descriptor table 478DSF device special file 479DSL dataset and snapshot layer 480DSL digital subscriber line 481DSL domain specific language 482DSLAM digital subscriber line access multiplexer 483DSN delivery status notification 484DSO dynamic shared object 485DSP digital signal processor 486DSSS direct sequence spread spectrum 487DTB device tree blob 488DTC device tree compiler 489DTD document type definition 490DTE data terminal equipment 491DTE dumb terminal emulator 492DTL diode-transistor logic 493DTLS datagram transport layer security 494DTS device tree source 495DTS digital thermal sensor 496DUT device under test 497DVB digital video broadcasting 498DVCS distributed version control system 499DVD digital versatile disc 500DVFS dynamic voltage and frequency scaling 501DVI device independent 502DVI Digital Visual Interface 503DVR digital video recorder 504DWARF Debugging With Attributed Record Formats 505E-XER extended XML encoding rules 506EABI embedded-application binary interface 507EAI Email Address Internationalization 508EAI Enterprise Application Integration 509EAP Extensible Authentication Protocol 510EAPOL EAP over Lan 511EAV entity-attribute-value model 512EAV ethernet audio/video bridging 513EBCDIC Extended Binary Coded Decimal Interchange Code 514EBDA Extended BIOS Data Area 515EBNF extended backus-naur form 516EBR extended boot record 517EC elliptic curve 518ECC elliptic curve cryptography 519ECC error correction code 520ECDH elliptic curve Diffie-Hellman 521ECDL elliptic curve discrete logarithm 522ECDLP elliptic curve discrete logarithm problem 523ECDSA elliptic curve digital signature algorithm 524ECL emitter-coupled logic 525ECN explicit congestion notification 526ECP enhanced capability port 527ECS enhanced chip set 528ECS extended configuration space 529EDAC error detection and correction 530EDAT enhanced dynamic acceleration technology 531EdDSA Edwards curve digital signature algorithm 532EDGE explicit data graph execution 533EDID extended display identification data 534EDO extended data out 535EDS electronical data sheet 536EDSAC electronic delay storage automatic calculator 537EDVAC electronic discrete variable automatic computer 538EEE energy efficient ethernet 539EEE embrace, extend, extinguish 540EEPROM electrically erasable programmable read only memory 541EFI extensible firmware interface 542EFL emitter follower logic 543EFM eight to fourteen modulation 544EFS extent file system 545EGA Enhanced Graphics Adapter 546EGP exterior gateway protocol 547EH extension header 548EIDE enhanced IDE 549EISA extended industry standard architecture 550EINJ error injection table 551ELF executable and linking format 552ELS entry level system 553EMI electro-magnetic interference 554EMP electro-magnetic pulse 555EMR electro-magnetic radiation 556EMACS Editor MACroS 557ENIAC electronic numerical integrator and computer 558EOF end of file 559EOI end of interrupt 560EOIS end of interactive support 561EOL end of life 562EOL end of line 563EOT end of transmission 564EPIC explicitly parallel instruction computing 565EPP enhanced parallel port 566EPP extensible provisioning protocol (RFC5730) 567EPRML extended partial response, maximum likelihood 568EPROM erasable programmable read only memory 569EPT extended page tables 570ERC error recovery control 571ERD emergency recovery disk 572ERD entity relationship diagram 573ERE extended regular expression 574ERST error record serialization table 575ESAN Efficiency Sanitizer 576ESB enterprise service bus 577ESDI enhanced small disk interface 578ESDRAM enhanced synchronous dynamic random access memory 579ESI enclosure services interface 580ESS electronic switching system 581ESS extended service set 582ESSID extended service set identifier 583EST enhanced speedstep 584ETL extract, transform, load 585EU execution unit 586EULA end user license agreement 587FAT file allocation table 588FBRAM frame buffer random access memory 589FCIF full common intermediate format 590FCL fiber channel loop 591FCS frame check sequence 592FDC floppy disk controller 593FDD floppy disk drive 594FDDI fiber distributed data interface 595FDE full disk encryption 596FDT flattened device tree 597FEA finite element analysis 598FEC forward error correction 599FET field-effect transistor 600FF finite field 601FF form feed 602FFDH finite-field Diffie-Hellman 603FFH functional fixed hardware 604FFI foreign function interface 605FFM focus follows mouse 606FFS Fast File System 607FFS find first set 608FFT fast Fourier transform 609FG floating gate 610FHRP first hop redundancy protocol 611FHSS frequency hop spread spectrum 612FID frequency identifier 613FIFO first in, first out 614FILO first in, last out 615FIPS Federal Information Processing Standards 616FIR fast infrared 617FLOPS floating [point] operations per second 618FLOSS free/libre/open source software 619FM frequency modulation 620FMR false match rate 621FOSS free/open source software 622FPGA field programmable gate array 623FPM fast page mode 624FPR floating point register 625FPU floating point unit 626FQDN fully qualified domain name 627FRR false rejection rate 628FRU field replaceable unit 629FS file system 630FSB front side bus 631FSCK file system check 632FSF Free Software Foundation 633FSK frequency shift keying 634FSM finite-state machine 635FTA fault tree analysis 636FTL flash translation layer 637FTP File Transfer Protocol 638FTPS File Transfer Protocol Secure 639FTTH fiber to the home 640FUS fast user switching 641FWH firmware hub 642FWS folding white space 643GAL generic array logic 644GARP generic attribute registration protocol 645GAS generic address structure 646GC garbage collector 647GCC GNU Compiler Collection 648GCM Galois counter mode 649GCR group-coded recording 650GDI Graphics Device Interface 651GDT global descriptor table 652GECOS general comprehensive operating supervisor 653GEM graphics environment manager 654GEM graphics execution manager 655GEMM general matrix multiply 656GENA general event notification architecture 657GHC Glasgow Haskell compiler 658GHES generic hardware error source 659GIC generic interrupt controller 660GID group identifier 661GIF graphics interchange format 662GLBP gateway load balancing protocol 663GMCH graphics and memory controller hub 664GNU GNU's Not Unix 665GOP graphics output protocol 666GOT global offset table 667GPE general purpose event 668GPF general protection fault 669GPG GNU Privacy Guard 670GPL [GNU] General Public License 671GPR general purpose register 672GPS generalized processor sharing 673GPT GUID partition table 674GPU graphics processing unit 675GR golden ratio 676GRE generic routing encapsulation 677GRO generic receive offload 678GSI global system interrupt 679GSO generic send offload 680GUI graphical user interface 681GUID globally unique identifier 682GUS Gravis UltraSound 683GVFS git virtual file system 684HA high availability 685HAL hardware abstraction layer 686HAT hashed array tree 687HATEOAS hypermedia as the engine of application state 688HBA host bus adapter 689HCC Home Cable Computer 690HCCA Home Cable Computer Adaptor 691HCF halt and catch fire 692HCI host controller interface 693HCI human-computer interaction 694HCL hardware compatibility list 695HDCP High-bandwidth Digital Content Protection 696HDD hard disk drive 697HDL hardware description language 698HDMI High-Definition Multimedia Interface 699HDTV high-definition television 700HECI host embedded controller interface 701HEST hardware error source table 702HEVC high efficiency video coding 703HF high frequency 704HFM highest frequency mode 705HFS hierarchical file system 706HID human interface device 707HKDF HMAC-based key derivation function 708HKP HTTP Keyserver Protocol 709HLL high-level language 710HMA high memory area 711HMI human-machine interface 712HOOD hierarchical object oriented design 713HOTP HMAC-based one time password 714HP Hewlett-Packard 715HPC high performance computing 716HPD hot plug detection 717HPET high precision event timer 718HSM hardware security module 719HSM hierarchical storage management 720HSRP hot standby router protocol 721HT hyper-threading 722HTC hardware thermal control 723HTCC high temperature co-fired ceramic 724HTML HyperText Markup Language 725HTT hyper-threading technology 726HTTP Hypertext Transfer Protocol 727HTTPS Hypertext Transfer Protocol Secure 728HVM hardware virtual machine 729HVDS High-Voltage Differential Signaling 730HWASAN Hardware-assisted Address Sanitizer 731HZ Hertz 732I2O intelligent input/output 733IA information assurance 734IAAS infrastructure as a service 735IANA Internet Assigned Numbers Authority 736IAB Internet Architecture Board 737IBC iterated block cipher 738IBM International Business Machines 739IBPI international blinking pattern interpretation 740IBS instruction based sampling 741IBSS independent basic service set 742IC integrated circuit 743ICA independent computer architecture 744ICACLS integrity control access control lists 745ICB Internet Citizen's Band 746ICE in-circuit emulator 747ICE internal compiler error 748ICH I/O controller hub 749ICMP Internet Control Message Protocol 750ICT information and communications technology 751ICW initialization command word 752IDA Intel dynamic acceleration 753IDCMP Intuition direct communication message port 754IDCT inverse discrete cosine transform 755IDE integrated development environment 756IDE integrated drive electronics 757IDPS intrusion detection [and] prevention system 758IDRP inter-domain routing protocol 759IDS intrusion detection system 760IDT interrupt descriptor table 761IE Internet Explorer 762IEC International Electrotechnical Commission 763IEEE Institute of Electrical and Electronics Engineers 764IESG Internet Engineering Steering Group 765IETF Internet Engineering Task Force 766IF intermediate frequency 767IFCM isochronous flow control mode 768IFF Interchange File Format 769IFS internal field separator 770IGD Internet gateway device 771IGMP Internet Group Management Protocol 772IGP interior gateway protocol 773IHV independent hardware vendor 774IKE Internet key exchange 775ILM internal loopback mode 776ILOM integrated lights-out management 777ILP instruction level parallelism 778IM instant messaging 779IME input method editor 780IMAP Internet Message Access Protocol 781IMC integrated memory controller 782IMCR interrupt mode configuration register 783IMR interrupt mask register 784IMS information management system 785IMSI international mobile subscriber identity 786INCITS InterNational Committee for Information Technology Standards 787INODE index node 788IO input/output 789IOCTL input/output control 790IOM input/output managers 791IOMMU input/output memory management unit 792IOT Internet of Things 793IP Internet Protocol 794IP intellectual property 795IPC instructions per cycle 796IPC interprocess communication 797IPCF interprocess communication facility 798IPE integrated programming environment 799IPI intelligent peripheral interface 800IPI interprocessor interrupt 801IPL Initial Program Load 802IPL Interrupt Priority Level 803IPMB Intelligent Platform Management Bus 804IPMI Intelligent Platform Management Interface 805IPNG Internet Protocol, Next Generation 806IPS in-plane switching 807IPS intrusion prevention system 808IPSEC Internet Protocol Security 809IRC Internet Relay Chat 810IRDA infrared data association 811IRDP ICMP Router Discovery Protocol 812IR intermediate representation 813IRQ interrupt request 814IRQL interrupt request level 815IRR interrupt request register 816IRTF Internet Research Task Force 817IS information system 818ISA industry standard architecture 819ISA instruction set architecture 820ISE instant secure erase 821ISDN integrated services digital network 822ISI inter-symbol interference 823ISL initial system load 824ISM industrial, scientific, [and] medical 825ISMS information system management system 826ISN initial serial number 827ISO International Standards Organization 828ISOC Internet Society 829ISP Internet service provider 830ISR in-service register 831ISR interrupt service routine 832IST internal spanning tree 833IST interrupt stack table 834ISV independent software vendor 835IT information technology 836ITB Intel Turbo Boost 837ITIL information technology infrastructure library 838ITP in-target probe 839ITSM IT service management 840IV initialization vector 841IVT interrupt vector table 842JBOD just a bunch of disks 843JCL Job Control Language 844JFET junction [gate] field-effect transistor 845JIT just in time 846JPEG Joint Photographic Experts Group 847JRE Java Runtime Environment 848JSON JavaScript Object Notation 849JTAG joint test action group 850KASAN Kernel Address Sanitizer 851KASLR kernel address space layout randomization 852KB keyboard 853KB kilobyte 854KBD keyboard 855KBD kilobaud 856KCS keyboard controller style 857KEM key encapsulation mechanism 858KLOC thousand lines of code 859KMS kernel-mode setting 860KPI kernel programming interface 861KVA kernel virtual address 862KVM kernel virtual machine 863KVM kernel virtual memory 864KVM keyboard, video, [and] mouse 865L2CAP link layer control and adaptation protocol 866LAG link aggregation group 867LAMP Linux Apache MySQL {Perl,PHP,Python} 868LAN local area network 869LAPIC local advanced programmable interrupt controller 870LAR load access rights 871LBA logical block addressing 872LBNF labeled backus-naur form 873LBS location-based service 874LCD liquid crystal display 875LCP link control protocol 876LDA local delivery agent 877LDAP Lightweight Directory Access Protocol 878LDR light-dependent resistor 879LDT local descriptor table 880LE logical extent 881LED light emitting diode 882LELL low energy link layer 883LER label edge router 884LF line feed 885LF low frequency 886LFM lowest frequency mode 887LFN long file names 888LFO low-frequency oscillation 889LFS log-structured file system 890LFU least frequently used 891LHP loop heat pipe 892LIF logical interchange format 893LIFO last in, first out 894LILO LInux LOader 895LILO last in, last out 896LINT local interrupt 897LIR local Internet registry 898LISP LISt Processor 899LISP Locator/ID Separation Protocol 900LKM {Linux,loadable} kernel module 901LKML Linux kernel mailing list 902LL load linked 903LL/SC load linked/store conditional 904LLC logical link control 905LLD low-level design 906LLDD low-level design document 907LLDP link layer discovery protocol 908LLF low level format 909LLMNR link-local multicast name resolution 910LLVM Low Level Virtual Machine 911LM long mode 912LMCE local machine check exception 913LMI local management interface 914LMM link management mode 915LMP link management protocol 916LNO loop nest optimization 917LOC lines of code 918LOM lights-out management 919LPE Linux performance events 920LPC low pin count 921LPS local positioning system 922LRC longitudinal redundancy check 923LRM left-to-right mark 924LRO Large Receive Offload 925LRO left-to-right override 926LRU least recently used 927LS link state 928LSAN Leak Sanitizer 929LSB Linux standards base 930LSB least significant {bit,byte} 931LSI large scale integration 932LSL load segment limit 933LSM log structured merge 934LSN Large Scale NAT 935LSN log sequence number 936LSO large send offload 937LSR label switch router 938LTCC low temperature co-fired ceramic 939LTO linear tape-open 940LTO link time optimization 941LTR left to right 942LTR load task register 943LTR letter(-sized paper) 944LTS long term support 945LUA Lua Uppercase Accident 946LUN logical unit number 947LV logical volume 948LVM logical volume management 949LVT local vector table 950LVDS Low-Voltage Differential Signaling 951LWP light-weight process 952LZSS Lempel Ziv Storer Szymanski 953LZW Lempel Ziv Welch 954MAB MAC authentication bypass 955MAC mandatory access control 956MAC {media,medium} access control 957MAC message authentication {check,code} 958MADT multiple APIC descriptor table 959MAMR microwave-assisted magnetic recording 960MB megabyte 961MBA multi-boot agent 962MBR master boot record 963MBS megabits per second 964MC memory controller 965MCA machine check architecture 966MCA MicroChannel architecture 967MCC multiversion concurrency control 968MCE machine check exception 969MCGA Multi-Color Graphics Array 970MCH memory controller hub 971MCLAG multi-chassis link aggregation group 972MCM multi-chip module 973MCQ memory controlled queue 974MD machine-dependent 975MD MiniDisc 976MD-SAL model-driven service abstraction layer 977MDA mail delivery agent 978MDA Monochrome Display Adapter 979MDC Management Data Clock 980MDI Medium Dependent Interface 981MDI-X Medium Dependent Interface Crossover 982MDIO Management Data Input/Output 983MDMX MIPS Digital Media eXtension 984MDRAM multibank dynamic random access memory 985MESI modified, exclusive, shared, invalid 986MFC merge from current 987MFC Microsoft Foundation Classes 988MFM modified frequency modulation 989MFU most frequently used 990MGCP media gateway control protocol 991MHU message handling unit 992MI machine-independent 993MI machine interface 994MIB management information base 995MIC message integrity {check,code} 996MID mobile Internet device 997MIDI musical instrument digital interface 998MIF management information format 999MII media independent interface 1000MIM man in the middle 1001MIMD multiple instruction, multiple data 1002MIME Multipurpose Internet Mail Extensions 1003MIMO multiple input multiple output 1004MIPS million instructions per second 1005MIPS Microprocessor without Interlocked Pipeline Stages 1006MISD multiple instruction, single data 1007MIT Massachusetts Institute of Technology 1008MITM man in the middle 1009ML machine language 1010ML machine learning 1011ML mailing list 1012ML markup language 1013ML maximum likelihood 1014MLAG multi-chassis link aggregation group 1015MLC multi-level cell 1016MLD multicast listener discovery 1017MLHP micro loop heat pipe 1018MLIR multi-level intermediate representation 1019MLO MMC loader 1020MMC multi-media card 1021MMF multi-mode fiber 1022MMIC monolithic microwave integrated circuit 1023MMIO memory mapped input/output 1024MMORPG massive multiplayer online role playing game 1025MMRP multiple MAC registration protocol 1026MMU memory management unit 1027MMX matrix math extension 1028MMX multimedia extension 1029MMX multiple math extension 1030MO magneto-optical 1031MOESI modified, owned, exclusive, shared, invalid 1032MOF maximum operating frequency 1033MOSFET metal-oxide-semiconductor field-effect transistor 1034MOSI modified, owned, shared, invalid 1035MP multi-platform 1036MP multiplayer 1037MP {multiprocessing,multiprocessor} 1038MPEG moving picture experts group 1039MPI message passing interface 1040MPLS Multiprotocol Label Switching 1041MPP massively parallel processor 1042MPS memory pool system 1043MPS multiprocessor specification 1044MQTT Message Queuing Telemetry Transport 1045MR modem ready 1046MRO method resolution order 1047MRP multiple registration protocol 1048MRU most recently used 1049MS Microsoft 1050MSAN Memory Sanitizer 1051MSB most significant {bit,byte} 1052MSC message sequence chart 1053MSE mean square error 1054MSF minutes seconds frames 1055MSI message signaled interrupt 1056MSI modified, shared, invalid 1057MSR {machine state,model-specific} register 1058MSS maximum segment size 1059MSTP Multiple Spanning Tree Protocol 1060MT machine translation 1061MTA mail transfer agent 1062MTBF mean time between failures 1063MTP media transfer protocol 1064MTRR memory type range register 1065MTTF mean time to failure 1066MTU maximum transmission unit 1067MUA mail user agent 1068MUD multi-user domain 1069MVCC multiversion concurrency control 1070MVR multicast VLAN registration 1071MVRP multiple VLAN registration protocol 1072MWE module width encoding 1073MX mail exchange 1074NACK negative acknowledgement 1075NAK negative acknowledgement 1076NAN neighbor awareness networking 1077NAN not a number 1078NAPT Network Address Port Translation 1079NAS network attached storage 1080NAT network address translation 1081NAV network allocation vector 1082NC numerical control 1083NC-SI network controller sideband interface 1084NCO numerically-controlled oscillator 1085NCP Network Control Protocol 1086NCSI network connectivity status indicator 1087NCQ native command queuing 1088ND neighbor discovery 1089NDFA nondeterministic finite automaton 1090NDIS network driver interface specification 1091NE numeric error 1092NEWS Network extensible Window System 1093NFA nondeterministic finite automaton 1094NFC near-field communication 1095NFCI no functional change intended 1096NFS network file system 1097NFV network function virtualization 1098NHACP NABU HCCA Application Communication Protocol 1099NIA next instruction address 1100NIC network information center 1101NIC network interface card 1102NIDS network intrusion detection system 1103NIP network interface protocol 1104NIPS network intrusion prevention system 1105NIS network information service 1106NIST National Institute of Standards and Technology 1107NLS native language support 1108NMI non-maskable interrupt 1109NNTP Network News Transfer Protocol 1110NMR nonce-misuse resistance 1111NOC network operations center 1112NOP no operation 1113NOS network operating system 1114NP nondeterministic polynomial time 1115NRND not recommended for new designs 1116NRZ non-return to zero 1117NSA nation-state adversary 1118NSA no such agency 1119NSA National Security Agency 1120NTM non-deterministic Turing machine 1121NTP Network Time Protocol 1122NUMA non-uniform memory access 1123NURBS non-uniform rational basis spline 1124NVMM NetBSD Virtual Machine Monitor 1125NVMM non-volatile main memory 1126NVRAM non-volatile random access memory 1127NW not write-through 1128NX no execute 1129OAEP optimal asymmetric encryption padding 1130OAM operations, administration, and {management,maintenance} 1131OBO off by one 1132OBOE off by one error 1133OCL object constraint language 1134OCR optical character recognition 1135ODBC Open Database Connectivity 1136ODE offline device environment 1137ODI open data-link interface 1138ODM object data manager 1139ODCM on-demand clock modulation 1140ODMR on-demand mail relay 1141ODT on-die termination 1142OEM original equipment manufacturer 1143OFB output feedback 1144OFDM orthogonal frequency division multiplexing 1145OFET organic field-effect transistor 1146OLAP online analytical processing 1147OLE object linking and embedding 1148OLTP online transaction processing 1149ONCE on-{chip,circuit} emulation 1150ONFI open nand flash interface 1151OO OpenOffice 1152OO object oriented 1153OOB out of band 1154OOE out of order execution 1155OOM out of memory 1156OOO OpenOffice.org 1157OOP object oriented programming 1158OOPS object oriented programming systems 1159OOSE object oriented software engineering 1160OPM operations per minute 1161OPS operations per second 1162OQL Object Query Language 1163ORB object request broker 1164ORM object-relational mapping 1165OS operating system 1166OSD object-based storage device 1167OSD open source definition 1168OSF open software foundation 1169OSI Open Source Initiative 1170OSI open systems interconnection 1171OSPF open shortest path first 1172OSPM OS power management 1173OSS open sound system 1174OSS open source software 1175OSVW operating system visible workarounds 1176OTP one time password 1177OTP open telecom platform 1178OU organizational unit 1179OUI organizationally unique identifier 1180OWASP Open Web Application Security Project 1181OWL Web Ontology Language 1182P2P PCI to PCI 1183P2P peer to peer 1184PA phase accumulator 1185PA physical address 1186PAAS platform as a service 1187PAC phase-amplitude converter 1188PAE physical address extension 1189PAGP port aggregation protocol 1190PAL phase alternating line 1191PAL programmable array logic 1192PAM pluggable authentication modules 1193PAM pulse amplitude modulation 1194PAP password authentication protocol 1195PAT page attribute table 1196PAT port address translation 1197PATA parallel ATA 1198PAX portable archive exchange 1199PBE pending break encoding 1200PBE programming by example 1201PBR partition boot record 1202PBX private branch exchange 1203PC personal computer 1204PC program counter 1205PCB printed circuit board 1206PCB process control block 1207PCB Protocol Control Block 1208PCBC propagating cipher block chaining 1209PCC Portable C Compiler 1210PCD page-level cache disable 1211PCE path computation element 1212PCE performance-monitor counter enable 1213PCEP Path Computation Element Protocol 1214PCH platform controller hub 1215PCI peripheral component interconnect 1216PCM phase change memory 1217PCM pulse code modulation 1218PCMCIA Personal Computer Memory Card International Association 1219PCP Port Control Protocol 1220PD public domain 1221PDA personal digital assistant 1222PDA pushdown automaton 1223PDAG propositional directed acyclic graph 1224PDB power distribution board 1225PDF portable document format 1226PDM pulse-duration modulation 1227PDN pull-down network 1228PDP page {descriptor,directory} page 1229PDS product data sheet 1230PDU protocol data unit 1231PE protection enable 1232PE provider edge 1233PE portable executable 1234PEAP Protected EAP 1235PECI platform environment control interface 1236PEP protocol extension protocol 1237PER packed encoding rules 1238PFS perfect forward secrecy 1239PGAS partitioned global address space 1240PGE page global enable 1241PGO profile guided optimization 1242PGP Pretty Good Privacy 1243PHB PCI host bridge 1244PHP PHP: Hypertext Preprocessor 1245PIC performance instrumentation counters 1246PIC position independent code 1247PIC programmable interrupt controller 1248PICNIC problem in chair, not in computer 1249PID process id 1250PIE position independent executable 1251PIL Priority Interrupt Level 1252PIM personal information manager 1253PIM platform-independent model 1254PIO programmed input/output 1255PIPT physically indexed, physically tagged 1256PIR private information retrieval 1257PIQ prefetch input queue 1258PIT programmable interrupt timer 1259PIV personal identity verification 1260PIX Private Internet eXchange 1261PKCS public-key cryptography standards 1262PKI public key infrastructure 1263PLC programmable logic controller 1264PLD programmable logic device 1265PLL phase locked loop 1266PLRU pseudo LRU 1267PLT procedure linkage table 1268PLTM package level thermal management 1269PM power management 1270PM {phase,pulse} modulation 1271PMC performance monitoring counters 1272PME power management event 1273PMEG page map entry group 1274PMI performance monitoring infrastructure 1275PMI platform management interrupt 1276PMIC power management integrated circuit 1277PMIO port-mapped input/output 1278PMT photo-multiplier tube 1279PMU performance monitoring units 1280PMU power management unit 1281PNG portable network graphics 1282PNP plug and play 1283POE power over ethernet 1284POF probability of failure 1285POP Post Office Protocol 1286POP power on password 1287POR plan of record 1288POSIX Portable Operating System Interface [for Unix] 1289POST power on self test 1290POTS plain old telephone system 1291POWER Performance Optimization With Enhanced RISC 1292POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1293PP pair programming 1294PPB PCI [to] PCI bridge 1295PPC PowerPC 1296PPC Power Performance Computing 1297PPI pixels per inch 1298PPM pages per minute 1299PPP Point-to-Point Protocol 1300PPPOA Point-to-Point Protocol over ATM 1301PPPOE Point-to-Point Protocol over Ethernet 1302PPR processor programming reference 1303PPT powerpoint 1304PPT punched paper tape 1305PPU physics processing unit 1306PQC post-quantum cryptography 1307PRAM Parameter RAM 1308PRBS pseudorandom bit sequence 1309PRG pseudorandom generator 1310PRF pseudorandom function [family] 1311PRML partial response, maximum likelihood 1312PRN pseudorandom {noise,number} 1313PRNG pseudorandom number generator 1314PROM programmable read only memory 1315PRP pseudorandom permutation 1316PRU Programmable Realtime Unit 1317PS PostScript 1318PSD power spectral density 1319PSE page size extensions 1320PSK phase shift keying 1321PSK pre-shared key 1322PSTN public switched telephone network 1323PSW program status word 1324PTE page table entry 1325PTLA pseudo top level aggregator 1326PTP page table page 1327PTV perceived target value 1328PU processing unit 1329PUC personal unblocking code 1330PUN physical unit number 1331PV physical volume 1332PVC permanent virtual circuit 1333PVG physical volume group 1334PVI protected-mode virtual interrupt 1335PVRST Per-VLAN rapid spanning tree 1336PVST Per-VLAN Spanning Tree 1337PWM pulse width modulation 1338PXE preboot execution environment 1339QA quality assurance 1340QAM quadrature amplitude modulation 1341QAM quality assurance management 1342QBE query by example 1343QC quality control 1344QDI quasi delay insensitive 1345QCIF quarter common intermediate format 1346QOI quality of implementation 1347QOI quick order interface 1348QOS quality of service 1349QVL qualified vendor list 1350R/O read only 1351R/W read/write 1352RA receiver address 1353RA remote assistance 1354RA resource affinity 1355RA router advertisement 1356RAD rapid application development 1357RADIUS remote authentication dial-in user service 1358RAID redundant array of {independent,inexpensive} disks 1359RAII resource acquisition is initialization 1360RAM random access memory 1361RAS reliability, availability and serviceability 1362RAS remote access service 1363RAS restartable atomic sequence 1364RAS row address strobe 1365RAT register allocation table 1366RAT remote access trojan 1367RBF radial basis function 1368RBL reputation block list 1369RBL real-time blackhole list 1370RBNF routing backus-naur form 1371RBT red-black tree 1372RC release candidate 1373RC remote control 1374RC run commands 1375RCS Revision Control System 1376RCU read, copy, update 1377RDB Rigid Disk Block 1378RDBMS relational database management system 1379RDF Resource Description Framework 1380RDM relational data model 1381RDMA remote direct memory access 1382RDP remote desktop protocol 1383RDRAM Rambus DRAM 1384RE regular expression 1385REPL read, evaluate, print, loop 1386REST representational state transfer 1387RF radio frequency 1388RFB remote frame buffer 1389RFI radio frequency interference 1390RFO request for ownership 1391RFU reserved for future use 1392RGB red green blue 1393RGBA red green blue alpha 1394RGMII reduced gigabit media independent interface 1395RH read hit 1396RHEL Red Hat Enterprise Linux 1397RHL Red Hat Linux 1398RIB routing information base 1399RIFF Resource Interchange File Format 1400RIP Raster Image Processor 1401RIP Routing Information Protocol 1402RIR regional Internet registry 1403RISC reduced instruction set {computer,computing} 1404RKM ROM Kernel Manual 1405RLE run length encoding 1406RLL run length limited 1407RLO right-to-left override 1408RM read miss 1409RMCP Remote Management Control Protocol 1410RMI remote method invocation 1411RMO Relaxed Memory Ordering 1412RMPM rapid memory power management 1413RMS root mean square 1414RMW read, modify, write 1415RNG random number generator 1416ROM read only memory 1417ROP return-oriented programming 1418RPC remote procedure call 1419RPG Report Program Generator 1420RPKI resource PKI 1421RPL requested privilege level 1422RPM revolutions per minute 1423RPN reverse Polish notation 1424RPVST Rapid Per-VLAN Spanning Tree 1425RR random replacement 1426RR round robin 1427RS relay station 1428RSA Rivest, Shamir, [and] Adleman 1429RSC Receive Segment Coalescing 1430RSIP Realm Specific IP 1431RSN Robust Secure Network 1432RSS really simple syndication 1433RSS Receive Side Scaling 1434RSS residual sum of squares 1435RSTP Rapid Spanning Tree Protocol 1436RT real time 1437RTC real time clock 1438RTC real time computing 1439RTF rich text format 1440RTL register transfer language 1441RTL resistor-transistor logic 1442RTL right to left 1443RTOS real time operating system 1444RTP Real-time Transport Protocol 1445RTS request to send 1446RTT round trip time 1447RTTI run-time type information 1448RUP rational unified process 1449RW Rabin-Williams 1450RWM read-write memory 1451RX {receive,receiver} 1452S/PDIF Sony/Philips Digital Interface Format 1453SA security advisory 1454SA security association 1455SA source address 1456SA structured analysis 1457SAAS software as a service 1458SABRE Semi-automated business research environment 1459SACD super audio compact disc 1460SAD security association database 1461SAF-TE SCSI accessed fault-tolerant enclosure 1462SAGE Semi-automated ground environment 1463SAL {service,system} abstraction layer 1464SAM serial access memory 1465SAM sum addressed memory 1466SAML security assertion markup language 1467SAN storage area network 1468SAP service access point 1469SAPIC streamlined advanced programmable interrupt controller 1470SASD structured analysis, structured design 1471SASI Shugart Associates System Interface 1472SASL simple authentication [and] security layer 1473SATA serial advanced technology attachment 1474SAX simple API for XML 1475SB sound blaster 1476SBSA server base system architecture 1477SBU standard build unit 1478SC store conditional 1479SCA source code analyzer 1480SCADA supervisory control and data acquisition 1481SCC single chip cloud 1482SCC source code control 1483SCCP skinny call control protocol 1484SCCS Source Code Control System 1485SCI scalable coherent interface 1486SCI system control interrupt 1487SCIM smart common input method 1488SCM software configuration management 1489SCM source code management 1490SCM storage-class memory 1491SCO synchronous connection orientated 1492SCP secure copy 1493SCP system control processor 1494SCPI system control and power interface 1495SCSI Small Computer System Interface 1496SCTP Stream Control Transmission Protocol 1497SDDC software defined data center 1498SDEI software delegated exception interface 1499SDI symbol deinterleave 1500SDK software development kit 1501SDL Simple Declarative Language 1502SDL Simple Direct-media Layer 1503SDLC {software,system,systems} development life cycle 1504SDN software defined networking 1505SDP Session Description Protocol 1506SDR software defined radio 1507SDRAM synchronous dynamic random access memory 1508SDS software defined storage 1509SDT syntax-directed translation 1510SEA synchronous external abort 1511SEGV segmentation violation 1512SED self-encrypting drive 1513SED stream editor 1514SEMB serial ATA enclosure management bridge 1515SEO search engine optimization 1516SES SCSI enclosure services 1517SFC sequential function chart 1518SFI simple firmware interface 1519SFI software fault isolation 1520SFTP SSH File Transfer Protocol 1521SFTP Serial File Transfer Protocol 1522SFTP Simple File Transfer Protocol 1523SGI Silicon Graphics, Inc 1524SGI software generated interrupt 1525SGMII serial gigabit media independent interface 1526SGPIO serial general purpose input/output 1527SGRAM synchronous graphics random access memory 1528SHA secure hash algorithm 1529SICP structure and interpretation of computer programs 1530SIDH supersingular isogeny Diffie-Hellman 1531SIEM security information and event management 1532SIF source input format 1533SIFS short inter-frame space 1534SIM subscriber identity module 1535SIMD single instruction, multiple data 1536SIMM single inline memory module 1537SIP Session Initiation Protocol 1538SIR signal-to-interference ratio 1539SIR slow infrared 1540SIRT security incident response team 1541SISD single instruction, single data 1542SIV synthetic intialization vector 1543SLAAC stateless address auto-configuration 1544SLC single-level cell 1545SLDRAM synchronous-link dynamic random access memory 1546SLED single large expensive disk 1547SLI scalable link interface 1548SLI scan-line interleave 1549SLIC system license internal code 1550SLOC source lines of code 1551SLRU segmented LRU 1552SMA smart memory access 1553SMAF system management action field 1554SMAP Simple Mail Access Protocol 1555SMAP supervisor mode access prevention 1556SMART self-monitoring analysis and reporting technology 1557SMB Server Message Block 1558SMB system management bus 1559SMBIOS System Management BIOS 1560SMC system management controller 1561SMD storage module device 1562SMEP supervisor mode execution protection 1563SMF single mode fiber 1564SMI structure of management information 1565SMI system management interrupt 1566SMM system management mode 1567SMP serial management protocol 1568SMP symmetric multiprocessing 1569SMR shingled magnetic recording 1570SMR state machine replication 1571SMT simultaneous multithreading 1572SMTP Simple Mail Transfer Protocol 1573SMU system management unit 1574SNA systems network architecture 1575SNAP Sub-Network Access Protocol 1576SNIA Storage Networking Industry Association 1577SNMP Simple Network Management Protocol 1578SNR signal-to-noise ratio 1579SOC security operations center 1580SOA service oriented architecture 1581SOAP Simple Object Access Protocol 1582SOC system on chip 1583SOF start of frame 1584SOH start of header 1585SOHO small office/home office 1586SOL serial over LAN 1587SOM system on module 1588SP service pack 1589SP stack pointer 1590SPA storage pool allocator 1591SPAN switched port analyzer 1592SPARC scalable processor architecture 1593SPARQL SPARQL Protocol and RDF Query Language 1594SPD security policy database 1595SPD serial presence detect 1596SPDIF Sony/Philips digital interface format 1597SPI serial peripheral interface 1598SPI stateful packet inspection 1599SPIR standard portable intermediate representation 1600SPL secondary program loader 1601SPL spinlock 1602SPL system interrupt priority level 1603SPMD single process, multiple data 1604SPR special purpose register 1605SPT sectors per track 1606SQA software quality assurance 1607SQCIF sub quarter common intermediate format 1608SQL Structured Query Language 1609SRAM static random access memory 1610SRC sample rate conversion 1611SRP SCSI RDMA protocol 1612SRR shaped round robin 1613SRTP Secure Real-time Transport Protocol 1614SS self-snoop 1615SS stack segment 1616SSA static single assignment 1617SSAP source service access point 1618SSB single-sideband modulation 1619SSC spread spectrum clock 1620SSD solid state drive 1621SSE streaming SIMD extensions 1622SSFDC solid state floppy disc card 1623SSH secure shell 1624SSI server side includes 1625SSID service set identifier 1626SSTP secure socket tunneling protocol 1627SSL secure sockets layer 1628SSP stack smashing protection 1629STC software thermal control 1630STD state transition diagram 1631STM software transactional memory 1632STOMP Streaming Text Oriented Messaging Protocol 1633STP Spanning Tree Protocol 1634STP shielded twisted pair 1635STRG spanning tree root guard 1636SUN Stanford University Network 1637SUS Single Unix Specification 1638SUT system under test 1639SVC switched virtual circuit 1640SVG scalable vector graphics 1641SVGA Super Video Graphics Array 1642SVI {switch,switched} virtual interface 1643SVM secure virtual machine 1644SVM support vector machine 1645SVR System V Release 1646SVS Separate Virtual Space 1647SWF Shockwave Flash 1648SWIG simplified wrapper [and] interface generator 1649SYR symbol timing recovery 1650TA test assertion 1651TA transmitter address 1652TACACS terminal access controller access-control system 1653TAI international atomic time 1654TAO track at once 1655TAOCP The Art of Computer Programming 1656TAP Test Anything Protocol 1657TAS test and set 1658TB terabyte 1659TBNF transitional backus-naur form 1660TCB trace capture buffer 1661TCB trusted computing base 1662TCC thermal control circuit 1663TCL tool command language 1664TCP Transmission Control Protocol 1665TCQ tagged command queueing 1666TDC time [to] digital converter 1667TDD test-driven development 1668TDD time division duplex 1669TDM time division multiplexing 1670TDMA time division multiple access 1671TDOA time difference of arrival 1672TDP thermal design {point,power} 1673TDR time-domain reflectometry 1674TECO Text Editor and Corrector 1675TEE Trusted Execution Environment 1676TFT thin film transistor 1677TFTP Trivial File Transfer Protocol 1678TIAS try it and see 1679TIFF tagged image file format 1680TITS try it to see 1681TK temporal key 1682TKIP Temporal Key Integrity Protocol 1683TLA top level aggregator 1684TLB translation lookaside buffer 1685TLD top level domain 1686TLER time-limited error recovery 1687TLI transport layer interface 1688TLS thread local storage 1689TLS transport layer security 1690TM Turing machine 1691TM thermal monitor 1692TMG transmogrifier 1693TMDS transition minimized differential signaling 1694TMO timeout 1695TOD time of day 1696TOE TCP offload engine 1697TOFU trust on first use 1698TOS terms of service 1699TOS trusted operating system 1700TOS type of service 1701TOTP time-based one time password 1702TP transaction processing 1703TPI tracks per inch 1704TPM transactions per minute 1705TPM trusted platform module 1706TPR task priority register 1707TPS transactions per second 1708TPS transmission parameters signaling 1709TR task register 1710TR token ring 1711TRL timing recovery loop 1712TRNG true random number generator 1713TS terminal services 1714TS time series 1715TS time stamp 1716TS transport stream 1717TSAN Thread Sanitizer 1718TSC time stamp counter 1719TSD time stamp disable 1720TSDB time series database 1721TSL test, set, lock 1722TSO time sharing option 1723TSO TCP segmentation offload 1724TSO Total Store Ordering 1725TSP Time-Stamp Protocol 1726TSP Tunnel Setup Protocol 1727TSP time synchronization protocol 1728TSP traveling salesman problem 1729TSS task state segment 1730TSV tab-separated values 1731TTL time to live 1732TTL transistor-transistor logic 1733TTM translation table maps 1734TTY teletype 1735TU translation unit 1736TUI {terminal,text-based,textual} user interface 1737TX {transmit out,transmitter} 1738TXG transaction group 1739TZ time zone 1740UAC user {access,account} control 1741UAF use-after-free 1742UART universal asynchronous receiver/transmitter 1743UAT user acceptance testing 1744UB undefined behavior 1745UBSAN Undefined Behavior Sanitizer 1746UC uncacheable 1747UCS uniform-cost search 1748UCS unified computing system 1749UCS universal coded character set 1750UDI uniform driver interface 1751UDMA ultra DMA 1752UDO ultra density optical 1753UDP User Datagram Protocol 1754UDS Unix Domain Socket 1755UEFI unified extensible firmware interface 1756UFO UDP fragmentation offload 1757UFS Unix File System 1758UGA universal graphics adapter 1759UI unit interval 1760UI user interface 1761UICC universal integrated circuit card 1762UID unique identifier 1763UID user identifier 1764UL upload 1765UMA uniform memory access 1766UMA upper memory area 1767UMB upper memory block 1768UML unified modeling language 1769UMPC ultra-mobile PC 1770UPNP universal plug and play 1771UPS uninterruptible power supply 1772URI uniform resource identifier 1773URL uniform resource locator 1774URN uniform resource name 1775USART universal synchronous/asynchronous receiver/transmitter 1776USB universal serial bus 1777USWC uncacheable speculative write combining 1778UT unit test 1779UTC coordinated universal time 1780UTF unicode transformation formats 1781UTP unshielded twisted pair 1782UTS UNIX time-sharing 1783UUCP Unix-to-Unix Copy Protocol 1784UUID universally unique identifier 1785UUOC useless use of cat 1786UUT unit under test 1787UX user experience 1788VA vertical alignment 1789VA virtual address 1790VA volt-ampere 1791VAX virtual address extension 1792VB Visual Basic 1793VBR volume boot record 1794VCA variable-gain amplifier 1795VCC common collector voltage 1796VCCP virtual chassis control protocol 1797VCF voltage-controlled filter 1798VCM virtual channel memory 1799VCO voltage-controlled oscillator 1800VCP virtual chassis port 1801VCS version control system 1802VDPAU Video Decode and Presentation API for Unix 1803VES virtual execution system 1804VESA Video Electronics Standards Association 1805VFO variable-frequency oscillator 1806VFS virtual file system 1807VG volume group 1808VGA Video Graphics Array 1809VHDCI very high density cable interconnect 1810VID {VLAN,voltage level} identifier 1811VIM Vi IMproved 1812VIPT virtually indexed, physically tagged 1813VIVT virtually indexed, virtually tagged 1814VLAN virtual local area network 1815VLD variable-length decoding 1816VLIW very long instruction word 1817VLSI very large scale integration 1818VLSM variable length subnet mask 1819VM virtual {machine,memory} 1820VME virtual mode extension 1821VMX vector multimedia extensions 1822VMX virtual machine extensions 1823VNC virtual network computing 1824VOD video on demand 1825VPD vital product data 1826VPN virtual private network 1827VPWS virtual private wire service 1828VR virtual reality 1829VRAM video random access memory 1830VRF virtual routing and forwarding 1831VRM voltage regulator module 1832VROC Virtual RAID On CPU 1833VRRP Virtual Router Redundancy Protocol 1834VSTP VLAN Spanning Tree Protocol 1835VTP VLAN Trunking Protocol 1836VXFS Veritas file system 1837VXVM Veritas volume manager 1838W watt 1839W3C World Wide Web Consortium 1840WAFL write anywhere file layout 1841WAMP Web Application Messaging Protocol 1842WAN wide area network 1843WAP Wireless Application Protocol 1844WAP wireless access point 1845WDM Windows Driver Model 1846WDDM Windows Display Driver Model 1847WDT watchdog timer 1848WEP Wired Equivalent Privacy 1849WFI wait for interrupt 1850WFQ weighted fair queuing 1851WH write hit 1852WHEA Windows hardware error architecture 1853WIFI wireless fidelity 1854WLAN wireless local area network 1855WM write miss 1856WMF Windows meta file 1857WMI Windows Management Instrumentation 1858WOL Wake-on-LAN 1859WOM Wake-on-Modem 1860WOR Wake-on-Ring 1861WORM write once read many 1862WP WordPerfect 1863WP word processor 1864WP write protect 1865WPA Wi-Fi Protected Access 1866WPA2 Wi-Fi Protected Access II 1867WPAD web proxy auto-discovery protocol 1868WPS Wi-Fi Protected Setup 1869WRAM window random access memory 1870WS web services 1871WTC write through caching 1872WTD weighted tail drop 1873WWAN wireless wide area network 1874WWW world wide web 1875WYSIAYG what you see is all you get 1876WYSIWYG what you see is what you get 1877XBAR crossbar 1878XDMCP X Display Manager control protocol 1879XER XML encoding rules 1880XGA Extended Graphics Array 1881XHR XMLHttpRequest 1882XIP execute in place 1883XML Extensible Markup Language 1884XNA XNA's not acronymed 1885XNS Xerox network systems 1886XOR exclusive or 1887XP extreme programming 1888XSI X/Open System Interface 1889XSL extensible stylesheet language 1890XSLT extensible stylesheet language transformations 1891XSS cross site scripting 1892XT extended technology 1893XTACACS extended terminal access controller access-control system 1894XTI X/Open transport interface 1895XUL XML user interface language 1896YACC yet another compiler compiler 1897YAML YAML ain't markup language 1898YANG yet another next generation 1899YAWPFAPR you are welcome; please file a problem report 1900YP Yellow Pages 1901YTD year to date 1902ZAP ZFS attribute processor 1903ZBR zone bit recording 1904ZFOD zero-filled on demand 1905ZFS zettabyte file system 1906ZIF zero insertion force 1907ZIFS zero insertion force socket 1908ZIL ZFS intent log 1909ZMA zone multicast address 1910ZOI zero one infinity 1911ZOI zone of influence 1912ZPL ZFS Posix layer 1913ZVOL ZFS Volume 1914