acronyms.comp revision 1.302
1$NetBSD: acronyms.comp,v 1.302 2020/04/29 22:17:38 rtr Exp $ 23WHS three-way handshake 38VSB 8-state vestigial side band modulation 4AA anti-aliasing 5AAA authentication, authorization, [and] accounting 6AAT average access time 7ABI application binary interface 8ABNF augmented backus-naur form 9ABR available bit rate 10ABRT automatic bug reporting tool 11AC alternating current 12ACI adjacent channel interferer 13ACID atomicity, consistency, isolation, durability 14ACK Amsterdam compiler kit 15ACK acknowledgement 16ACL access control list 17ACL active current loop 18ACL asynchronous connection less 19ACP auxiliary control {process,program} 20ACPI advanced configuration and power interface 21ACS access control set 22ACU automatic calling unit 23ADB Apple desktop bus 24ADC analog [to] digital converter 25ADD acronym driven development 26ADDDC adaptive double DRAM device correction 27ADO active data objects 28ADP automatic data processing 29ADPCM adaptive differential pulse code modulation 30ADS alternate data stream 31ADSL asymmetric digital subscriber line 32ADT abstract data type 33AEDC advanced error detection and correction 34AER advanced error reporting 35AES Advanced Encryption Standard 36AFP Apple Filing Protocol 37AFS Andrew File System 38AGC automatic gain control 39AGP accelerated graphics port 40AI analog input 41AI artificial intelligence 42AL access list 43AL active link 44ALE address latch enable 45ALS ambient light sensor 46ALSA advanced Linux sound architecture 47ALU arithmetic and logical unit 48ALUA asymmetric logical unit access 49AM access method 50AM alignment mask 51AM amplitude modulation 52AMD Advanced Micro Devices Inc 53AMDD Agile model-driven development 54AMI alternate mark inversion 55AMP asymmetric multiprocessing 56AMQP advanced message queuing protocol 57AMT active management technology 58AN Arabic number 59ANR application not responding 60ANSI American National Standards Institute 61AO analog output 62AOC add-on card 63AOL Alert-on-LAN 64AOS add or subtract 65AP access point 66AP application processor 67APFS Apple file system 68API application programming interface 69APEI ACPI platform error interface 70APIC advanced programmable interrupt controller 71APIPA automatic private IP addressing 72APM advanced power management 73APM application performance management 74APU accelerated processing unit 75APT advanced persistent threat 76AQM active queue management 77ARAT always running APIC timer 78ARC adaptive replacement cache 79ARC Advanced RISC Computing 80ARC automatic reference counting 81ARM Advanced RISC Machines 82ARP Address Resolution Protocol 83ARPA Advanced Research Projects Agency 84ARQ automatic repeat request 85ARR address range register 86ARU audio response unit 87AS autonomous system 88ASA Adaptive Security Appliance 89ASAN Address Sanitizer 90ASC advanced smart cache 91ASCII American Standard Code for Information Interchange 92ASD agile software development 93ASE advanced software environment 94ASF alert standard format 95ASIC application-specific integrated circuit 96ASK amplitude shift keying 97ASLR address space layout randomization 98ASN autonomous system number 99ASP active server pages 100ASP auxiliary storage pool 101ASPM active state power management 102ASQ automated software quality 103ASR address space register 104ASR Apple software restore 105AST abstract syntax tree 106AST asynchronous system trap 107AT access time 108AT advanced technology 109ATA advanced technology attachment 110ATAPI advanced technology attachment packet interface 111ATC address translation cache 112ATF ARM trusted firmware 113ATF automated testing framework 114ATM asynchronous transfer mode 115ATX advanced technology extended 116AV anti virus 117AVB audio video bridging 118AVL Adelson-Velsky-Landis 119AVX advanced vector extensions 120AWDL Apple wireless direct link 121BA byte align 122BAL basic assembly language 123BAR base address register 124BBS bulletin board system 125BCC blind carbon copy 126BCD binary coded decimal 127BCH boot console handler 128BCR byte count register 129BCS base configuration space 130BD baud 131BDD binary decision diagram 132BDI bit deinterleave 133BDUF big design up front 134BEDO burst extended data output 135BER basic encoding rules 136BER bit error {rate,ratio} 137BERT boot error record table 138BFD bidirectional forwarding detection 139BFD binary {file,format} descriptor 140BFKL big fscking kernel lock 141BFS breadth-first search 142BFT binary file transfer 143BGA ball grid array 144BGP Border Gateway Protocol 145BGPSEC BGP Security 146BIND Berkeley Internet Name Daemon 147BIOS Basic Input/Output System 148BIOS built-in operating system 149BIST built-in self-test 150BIU bus interface unit 151BKDG BIOS and kernel developer's guide 152BLAS basic linear algebra subprograms 153BLC back light control 154BLE Bluetooth low energy 155BLOB binary large object 156BM bus master 157BMC baseboard management controller 158BMIC bus master interface controller 159BN boundary neutral 160BNF Backus-Naur form 161BO binary output 162BOF beginning of file 163BOM beginning of message 164BOM byte order mark 165BP base pointer 166BP boot processor 167BPB BIOS parameter block 168BPDU bridge protocol data unit 169BPF Berkeley Packet Filter 170BPI bits per inch 171BPM business process modelling 172BPS bits per second 173BPSK binary phase shift keying 174BQS Berkeley quality software 175BRE basic regular expression 176BS backspace 177BS binary sequence 178BSA basic service area 179BSD Berkeley Software Distribution 180BSDP Boot Service Discovery Protocol 181BSF bit scan forward 182BSOD blue screen of death 183BSP binary space partition 184BSP board support package 185BSP bootstrap processor 186BSR bit scan reverse 187BSS basic service set 188BSS block started by symbol 189BSSID basic service set identifier 190BT BitTorrent 191BT Bluetooth 192BT bit test 193BTC bit test [and] complement 194BTM bus transport mechanism 195BTR bit test [and] reset 196BTS bit test [and] set 197BTS bug tracking system 198BW bandwidth 199BWM block-write mode 200BUAG big ugly ASCII graphic 201CA certificate authority 202CACLS change access control lists 203CAD computer-aided design 204CAM computer assisted manufacturing 205CAM conditional access module 206CAM content addressable memory 207CARP Common Address Redundancy Protocol 208CAS column address strobe 209CAS compare and swap 210CAS computer algebra system 211CASE computer aided software engineering 212CAU control access unit 213CAV constant angular velocity 214CBC cipher block chaining 215CBR constant bit rate 216CC carbon copy 217CCC Chaos Computer Club 218CCD charge coupled device 219CCI co-channel interferer 220CCNUMA cache-coherent non-uniform memory access 221CCTL command completion time limit 222CD cache disable 223CD compact disc 224CDDA compact disc digital audio 225CDL compiler description language 226CDMA code division multiple access 227CDP Cisco Discovery Protocol 228CDRAM cache dynamic random access memory 229CER canonical encoding rules 230CE customer edge 231CF compact flash 232CFB cipher feedback 233CFG context-free grammar 234CFG control-flow graph 235CFI control-flow integrity sanitizer 236CG control gate 237CGA Color Graphics Adapter 238CGI common gateway interface 239CGN Carrier-Grade NAT 240CHAP Challenge-Handshake Authentication Protocol 241CHFS chip file system 242CHS cylinder/head/sector 243CI continuous integration 244CI {common,component} interface 245CIA confidentiality, integrity, availability 246CIDR Classless Inter-Domain Routing 247CIF common intermediate format 248CIFS Common Internet File System 249CIL common intermediate language 250CIR carrier-to-interference ratio 251CIS contact image sensor 252CISC complex instruction set {computer,computing} 253CJK Chinese, Japanese, [and] Korean 254CLF common log format 255CLI command line interface 256CLI common language infrastructure 257CLR common language runtime 258CLS common language specification 259CLTT closed loop thermal throttling 260CLUT color look-up table 261CLV constant linear velocity 262CM configuration management 263CMA concert multithread architecture 264CMC chassis management controller 265CMC corrected machine check 266CMS {configuration,content,course} management system 267CMI control {management,method} interface 268CMOS complementary metal-oxide-semiconductor 269CMP chip multi-processing 270CMS content management system 271CMYK cyan magenta yellow black 272CN {common,canonical} name 273CNC computer numerical control 274CNR carrier-to-noise ratio 275COA change of authority 276COF current operating frequency 277COFDM coded orthogonal frequency division multiplexing 278COFF common object file format 279COM component object model 280COM computer on module 281COMA cache-only memory architecture 282CORBA common object request broker architecture 283COS class of service 284COW copy-on-write 285CP continuous pilot 286CPA chosen-plaintext attack 287CPB core performance boost 288CPC central processor complex 289CPC cpu performance counters 290CPE common phase error 291CPE common platform enumeration 292CPER common platform error record 293CPG clock pulse generator 294CPI cycles per instruction 295CPL current privilege level 296CPLD complex programmable logic device 297CPP C preprocessor 298CPS characters per second 299CPS continuation-passing style 300CPT command pass through 301CPU central processing unit 302CR carriage return 303CRC cyclic redundancy check 304CRL carrier recovery loop 305CRLF carriage return line feed 306CSU C start up 307CRT cathode ray tube 308CRUD create, read, update, and delete 309CS cable select 310CS chip select 311CS code segment 312CS computer science 313CSDL {common,conceptual} schema definition language 314CSI channel state information 315CSI common system interface 316CSMA carrier sense multiple access 317CSMA/CA carrier sense multiple access with collision avoidance 318CSMA/CD carrier sense multiple access with collision detection 319CSP communicating sequential processes 320CSP content security policy 321CSP constrain satisfaction problems 322CSP cryptographic service provider 323CSR control [and] status registers 324CSRG Computer Systems Research Group 325CSS cascading style sheets 326CST common spanning tree 327CSV comma-separated values 328CTF compact c type format 329CTM close to metal 330CTR counter [mode] 331CTS clear to send 332CTS common type system 333CUA common user access 334CUT coordinated universal time 335CV control voltage 336CVE common vulnerabilities and exposures 337CVS Concurrent Versions System 338DA destination address 339DAA distributed application architecture 340DAAP digital audio access protocol 341DAB digital audio broadcasting 342DAC digital [to] analog converter 343DAC discretionary access control 344DAD duplicate address detection 345DANE DNS-based Authentication of Named Entities 346DAO disk at once 347DAP Directory Access Protocol 348DAT digital audio tape 349DAT dynamic acceleration technology 350DB database 351DBA database administrator 352DBA dynamic bandwidth allocation 353DBB data bus buffer 354DBC design by contract 355DBL dynamic buffer limiting 356DBMS database management system 357DBS database server 358DC direct current 359DCC Direct Client-to-Client 360DCC direct cable connect 361DCD data carrier detect 362DCE data control equipment 363DCE distributed computing environment 364DCIM data center infrastructure management 365DCIM digital camera images 366DCL Digital Command Language 367DCOM distributed component object model 368DCOP Desktop COmmunication Protocol 369DCS data collection systems 370DCT discrete cosine transform 371DCU data cache unit 372DDC display data channel 373DDE dynamic data exchange 374DDI device drivers interface 375DDK device driver kit 376DDL data description language 377DDR double data rate 378DDS direct digital sound 379DDWG Digital Display Working Group 380DE debugging extensions 381DE desktop environment 382DEA data encryption algorithm 383DEC Digital Equipment Corporation 384DEK data encryption key 385DEP data execution prevention 386DER distinguished encoding rules 387DES Data Encryption Standard 388DF don't fragment 389DFA deterministic finite automaton 390DFC data flow control 391DFS depth first search 392DFS distributed file system 393DFSAN Data Flow Sanitizer 394DFT diagnostic function test 395DFT discrete Fourier transform 396DGL data generation language 397DH Diffie-Hellman 398DHCP Dynamic Host Configuration Protocol 399DIA dedicated Internet access 400DIFS distributed inter-frame space 401DIMM dual inline memory module 402DIRT design in real time 403DKI driver/kernel interface 404DL diode logic 405DL discrete logarithm 406DL download 407DLCI data link connection identifier 408DLE data link escape 409DLL dynamic link library 410DLNA digital living network alliance 411DLP discrete logarithm problem 412DMA direct memory access 413DMI desktop management interface 414DMS document management system 415DMT discrete multitone modulation 416DMU data management layer 417DNARD Digital network appliance reference design 418DND drag and drop 419DNLC directory name lookup cache 420DNS Domain Name System 421DNSSEC DNS Security Extensions 422DOE distributed object environment 423DOF data over fibre 424DOM document object model 425DOS denial of service 426DOS disk operating system 427DP DisplayPort 428DPC deferred procedure call 429DPCM differential pulse code modulation 430DPD dead peer detection 431DPI deep packet inspection 432DPI dots per inch 433DPL descriptor privilege level 434DPS Display PostScript 435DPST display power savings technology 436DRAAS disaster recovery as a service 437DRAM dynamic random access memory 438DRBG deterministic random bit generator 439DRI direct rendering infrastructure 440DRM digital rights management 441DRRS display refresh rate switching 442DS debug store 443DS differentiated services 444DSA digital signature algorithm 445DSAP destination service access point 446DSB double-sideband modulation 447DSCP differentiated services code point 448DSDT differentiated system descriptor table 449DSF device special file 450DSL dataset and snapshot layer 451DSL digital subscriber line 452DSL domain specific language 453DSLAM digital subscriber line access multiplexer 454DSN delivery status notification 455DSO dynamic shared object 456DSP digital signal processor 457DSSS direct sequence spread spectrum 458DTB device tree blob 459DTC device tree compiler 460DTD document type definition 461DTE data terminal equipment 462DTE dumb terminal emulator 463DTL diode-transistor logic 464DTLS datagram transport layer security 465DTS device tree source 466DTS digital thermal sensor 467DUT device under test 468DVB digital video broadcasting 469DVCS distributed version control system 470DVD digital versatile disc 471DVFS dynamic voltage and frequency scaling 472DVI device independent 473DVI Digital Visual Interface 474DVR digital video recorder 475E-XER extended XML encoding rules 476EABI embedded-application binary interface 477EAI Email Address Internationalization 478EAI Enterprise Application Integration 479EAP Extensible Authentication Protocol 480EAPOL EAP over Lan 481EAV entity-attribute-value model 482EAV ethernet audio/video bridging 483EBCDIC Extended Binary Coded Decimal Interchange Code 484EBDA Extended BIOS Data Area 485EBNF extended backus-naur form 486EBR extended boot record 487EC elliptic curve 488ECC elliptic curve cryptography 489ECC error correction code 490ECDH elliptic curve Diffie-Hellman 491ECDL elliptic curve discrete logarithm 492ECDLP elliptic curve discrete logarithm problem 493ECDSA elliptic curve digital signature algorithm 494ECL emitter-coupled logic 495ECN explicit congestion notification 496ECP enhanced capability port 497ECS enhanced chip set 498ECS extended configuration space 499EDAC error detection and correction 500EDAT enhanced dynamic acceleration technology 501EdDSA Edwards curve digital signature algorithm 502EDGE explicit data graph execution 503EDID extended display identification data 504EDO extended data out 505EDS electronical data sheet 506EDSAC electronic delay storage automatic calculator 507EDVAC electronic discrete variable automatic computer 508EEE energy efficient ethernet 509EEPROM electrically erasable programmable read only memory 510EFI extensible firmware interface 511EFL emitter follower logic 512EFM eight to fourteen modulation 513EFS extent file system 514EGA Enhanced Graphics Adapter 515EGP exterior gateway protocol 516EH extension header 517EIDE enhanced IDE 518EISA extended industry standard architecture 519EINJ error injection table 520ELF executable and linking format 521ELS entry level system 522EMI electro-magnetic interference 523EMP electro-magnetic pulse 524EMR electro-magnetic radiation 525EMACS Editor MACroS 526ENIAC electronic numerical integrator and computer 527EOF end of file 528EOI end of interrupt 529EOIS end of interactive support 530EOL end of life 531EOL end of line 532EOT end of transmission 533EPIC explicitly parallel instruction computing 534EPP enhanced parallel port 535EPRML extended partial response, maximum likelihood 536EPROM erasable programmable read only memory 537EPT extended page tables 538ERC error recovery control 539ERD emergency recovery disk 540ERD entity relationship diagram 541ERE extended regular expression 542ERST error record serialization table 543ESAN Efficiency Sanitizer 544ESB enterprise service bus 545ESDI enhanced small disk interface 546ESDRAM enhanced synchronous dynamic random access memory 547ESI enclosure services interface 548ESS electronic switching system 549ESS extended service set 550ESSID extended service set identifier 551EST enhanced speedstep 552ETL extract, transform, load 553EU execution unit 554EULA end user license agreement 555FAT file allocation table 556FBRAM frame buffer random access memory 557FCIF full common intermediate format 558FCL fiber channel loop 559FCS frame check sequence 560FDC floppy disk controller 561FDD floppy disk drive 562FDDI fiber distributed data interface 563FDE full disk encryption 564FDT flattened device tree 565FEA finite element analysis 566FEC forward error correction 567FET field-effect transistor 568FF finite field 569FF form feed 570FFDH finite-field Diffie-Hellman 571FFH functional fixed hardware 572FFI foreign function interface 573FFM focus follows mouse 574FFS Fast File System 575FFS find first set 576FFT fast Fourier transform 577FG floating gate 578FHSS frequency hop spread spectrum 579FID frequency identifier 580FIFO first in, first out 581FILO first in, last out 582FIPS Federal Information Processing Standards 583FIR fast infrared 584FLOPS floating [point] operations per second 585FLOSS free/libre/open source software 586FM frequency modulation 587FMR false match rate 588FOSS free/open source software 589FPGA field programmable gate array 590FPM fast page mode 591FPR floating point register 592FPU floating point unit 593FQDN fully qualified domain name 594FRR false rejection rate 595FRU field replaceable unit 596FS file system 597FSB front side bus 598FSCK file system check 599FSF Free Software Foundation 600FSK frequency shift keying 601FSM finite-state machine 602FTA fault tree analysis 603FTL flash translation layer 604FTP File Transfer Protocol 605FTPS File Transfer Protocol Secure 606FUS fast user switching 607FWH firmware hub 608FWS folding white space 609GAL generic array logic 610GARP generic attribute registration protocol 611GAS generic address structure 612GC garbage collector 613GCM Galois counter mode 614GCR group-coded recording 615GDI Graphics Device Interface 616GDT global descriptor table 617GECOS general comprehensive operating supervisor 618GEM graphics environment manager 619GEM graphics execution manager 620GENA general event notification architecture 621GHC Glasgow Haskell compiler 622GHES generic hardware error source 623GIC generic interrupt controller 624GID group identifier 625GIF graphics interchange format 626GMCH graphics and memory controller hub 627GNU GNU's Not Unix 628GOP graphics output protocol 629GOT global offset table 630GPE general purpose event 631GPF general protection fault 632GPG GNU Privacy Guard 633GPL [GNU] General Public License 634GPR general purpose register 635GPS generalized processor sharing 636GPT GUID partition table 637GPU graphics processing unit 638GR golden ratio 639GRE generic routing encapsulation 640GSI global system interrupt 641GUI graphical user interface 642GUID globally unique identifier 643GVFS git virtual file system 644HA high availability 645HAL hardware abstraction layer 646HAT hashed array tree 647HATEOAS hypermedia as the engine of application state 648HBA host bus adapter 649HCF halt and catch fire 650HCI host controller interface 651HCI human-computer interaction 652HCL hardware compatibility list 653HDCP High-bandwidth Digital Content Protection 654HDD hard disk drive 655HDL hardware description language 656HDMI High-Definition Multimedia Interface 657HDTV high-definition television 658HECI host embedded controller interface 659HEST hardware error source table 660HEVC high efficiency video coding 661HF high frequency 662HFM highest frequency mode 663HFS hierarchical file system 664HID human interface device 665HKP HTTP Keyserver Protocol 666HLL high-level language 667HMA high memory area 668HMI human-machine interface 669HOOD hierarchical object oriented design 670HP Hewlett-Packard 671HPC high performance computing 672HPD hot plug detection 673HPET high precision event timer 674HSM hardware security module 675HSM hierarchical storage management 676HT hyper-threading 677HTC hardware thermal control 678HTCC high temperature co-fired ceramic 679HTML HyperText Markup Language 680HTT hyper-threading technology 681HTTP Hypertext Transfer Protocol 682HTTPS Hypertext Transfer Protocol Secure 683HVM hardware virtual machine 684HVDS High-Voltage Differential Signaling 685HWASAN Hardware-assisted Address Sanitizer 686HZ Hertz 687I2O intelligent input/output 688IA information assurance 689IAAS infrastructure as a service 690IANA Internet Assigned Numbers Authority 691IBC iterated block cipher 692IBM International Business Machines 693IBPI international blinking pattern interpretation 694IBS instruction based sampling 695IBSS independent basic service set 696IC integrated circuit 697ICA independent computer architecture 698ICACLS integrity control access control lists 699ICB Internet Citizen's Band 700ICE in-circuit emulator 701ICE internal compiler error 702ICH I/O controller hub 703ICMP Internet Control Message Protocol 704ICT information and communications technology 705ICW initialization command word 706IDA Intel dynamic acceleration 707IDCMP Intuition direct communication message port 708IDCT inverse discrete cosine transform 709IDE integrated development environment 710IDE integrated drive electronics 711IDPS intrusion detection [and] prevention system 712IDRP inter-domain routing protocol 713IDS intrusion detection system 714IDT interrupt descriptor table 715IE Internet Explorer 716IEC International Electrotechnical Commission 717IEEE Institute of Electrical and Electronics Engineers 718IESG Internet Engineering Steering Group 719IETF Internet Engineering Task Force 720IF intermediate frequency 721IFCM isochronous flow control mode 722IFF Interchange File Format 723IFS internal field separator 724IGD Internet gateway device 725IGMP Internet Group Management Protocol 726IGP interior gateway protocol 727IHV independent hardware vendor 728IKE Internet key exchange 729ILM internal loopback mode 730ILOM integrated lights-out management 731ILP instruction level parallelism 732IM instant messaging 733IMAP Internet Message Access Protocol 734IMC integrated memory controller 735IMCR interrupt mode configuration register 736IMR interrupt mask register 737IMS information management system 738IMSI international mobile subscriber identity 739INCITS InterNational Committee for Information Technology Standards 740INODE index node 741IO input/output 742IOCTL input/output control 743IOM input/output managers 744IOMMU input/output memory management unit 745IOT Internet of Things 746IP Internet Protocol 747IP intellectual property 748IPC instructions per cycle 749IPC interprocess communication 750IPCF interprocess communication facility 751IPE integrated programming environment 752IPI intelligent peripheral interface 753IPI interprocessor interrupt 754IPL Initial Program Load 755IPL Interrupt Priority Level 756IPMB Intelligent Platform Management Bus 757IPMI Intelligent Platform Management Interface 758IPNG Internet Protocol, Next Generation 759IPS in-plane switching 760IPS intrusion prevention system 761IPSEC Internet Protocol Security 762IRC Internet Relay Chat 763IRDA infrared data association 764IRDP ICMP Router Discovery Protocol 765IRQ interrupt request 766IRQL interrupt request level 767IRR interrupt request register 768IRTF Internet Research Task Force 769IS information system 770ISA industry standard architecture 771ISA instruction set architecture 772ISE instant secure erase 773ISDN integrated services digital network 774ISI inter-symbol interference 775ISL initial system load 776ISM industrial, scientific, [and] medical 777ISMS information system management system 778ISN initial serial number 779ISO International Standards Organization 780ISOC Internet Society 781ISP Internet service provider 782ISR in-service register 783ISR interrupt service routine 784IST internal spanning tree 785IST interrupt stack table 786ISV independent software vendor 787IT information technology 788ITB Intel Turbo Boost 789ITIL information technology infrastructure library 790ITP in-target probe 791ITSM IT service management 792IV initialization vector 793IVT interrupt vector table 794JBOD just a bunch of disks 795JCL Job Control Language 796JFET junction [gate] field-effect transistor 797JIT just in time 798JPEG Joint Photographic Experts Group 799JRE Java Runtime Environment 800JSON JavaScript Object Notation 801JTAG joint test action group 802KASLR kernel address space layout randomization 803KB keyboard 804KB kilobyte 805KBD keyboard 806KBD kilobaud 807KCS keyboard controller style 808KLOC thousand lines of code 809KMS kernel-mode setting 810KPI kernel programming interface 811KVA kernel virtual address 812KVM kernel virtual machine 813KVM kernel virtual memory 814KVM keyboard, video, [and] mouse 815L2CAP link layer control and adaptation protocol 816LAG link aggregation group 817LAMP Linux Apache MySQL {Perl,PHP,Python} 818LAN local area network 819LAPIC local advanced programmable interrupt controller 820LAR load access rights 821LBA logical block addressing 822LBNF labeled backus-naur form 823LBS location-based service 824LCD liquid crystal display 825LCP link control protocol 826LDA local delivery agent 827LDAP Lightweight Directory Access Protocol 828LDR light-dependent resistor 829LDT local descriptor table 830LE logical extent 831LED light emitting diode 832LELL low energy link layer 833LER label edge router 834LF line feed 835LF low frequency 836LFM lowest frequency mode 837LFN long file names 838LFO low-frequency oscillation 839LFS log-structured file system 840LFU least frequently used 841LHP loop heat pipe 842LIF logical interchange format 843LIFO last in, first out 844LILO LInux LOader 845LILO last in, last out 846LINT local interrupt 847LIR local Internet registry 848LISP LISt Processor 849LISP Locator/ID Separation Protocol 850LKM {Linux,loadable} kernel module 851LKML Linux kernel mailing list 852LL load linked 853LL/SC load linked/store conditional 854LLC logical link control 855LLD low-level design 856LLDD low-level design document 857LLDP link layer discovery protocol 858LLF low level format 859LLMNR link-local multicast name resolution 860LLVM Low Level Virtual Machine 861LM long mode 862LMCE local machine check exception 863LMI local management interface 864LMM link management mode 865LMP link management protocol 866LNO loop nest optimization 867LOC lines of code 868LOM lights-out management 869LPE Linux performance events 870LPC low pin count 871LPS local positioning system 872LRC longitudinal redundancy check 873LRM left-to-right mark 874LRO left-to-right override 875LRU least recently used 876LS link state 877LSAN Leak Sanitizer 878LSB Linux standards base 879LSB least significant {bit,byte} 880LSI large scale integration 881LSL load segment limit 882LSM log structured merge 883LSN Large Scale NAT 884LSN log sequence number 885LSO large send offload 886LSR label switch router 887LTCC low temperature co-fired ceramic 888LTO linear tape-open 889LTO link time optimization 890LTR left to right 891LTR load task register 892LTR letter(-sized paper) 893LTS long term support 894LUA Lua Uppercase Accident 895LUN logical unit number 896LV logical volume 897LVM logical volume management 898LVT local vector table 899LVDS Low-Voltage Differential Signaling 900LWP light-weight process 901LZSS Lempel Ziv Storer Szymanski 902LZW Lempel Ziv Welch 903MAB MAC authentication bypass 904MAC mandatory access control 905MAC {media,medium} access control 906MAC message authentication {check,code} 907MADT multiple APIC descriptor table 908MAMR microwave-assisted magnetic recording 909MB megabyte 910MBA multi-boot agent 911MBR master boot record 912MBS megabits per second 913MC memory controller 914MCA machine check architecture 915MCA MicroChannel architecture 916MCC multiversion concurrency control 917MCE machine check exception 918MCGA Multi-Color Graphics Array 919MCH memory controller hub 920MCLAG multi-chassis link aggregation group 921MCM multi-chip module 922MCQ memory controlled queue 923MD machine-dependent 924MD-SAL model-driven service abstraction layer 925MDA mail delivery agent 926MDA Monochrome Display Adapter 927MDC Management Data Clock 928MDI Medium Dependent Interface 929MDI-X Medium Dependent Interface Crossover 930MDIO Management Data Input/Output 931MDMX MIPS Digital Media eXtension 932MDRAM multibank dynamic random access memory 933MESI modified, exclusive, shared, invalid 934MFC merge from current 935MFC Microsoft Foundation Classes 936MFM modified frequency modulation 937MFU most frequently used 938MGCP media gateway control protocol 939MHU message handling unit 940MI machine-independent 941MI machine interface 942MIB management information base 943MIC message integrity {check,code} 944MID mobile Internet device 945MIDI musical instrument digital interface 946MIF management information format 947MII media independent interface 948MIM man in the middle 949MIMD multiple instruction, multiple data 950MIME Multipurpose Internet Mail Extensions 951MIMO multiple input multiple output 952MIPS million instructions per second 953MIPS Microprocessor without Interlocked Pipeline Stages 954MISD multiple instruction, single data 955MIT Massachusetts Institute of Technology 956MITM man in the middle 957ML machine language 958ML machine learning 959ML mailing list 960ML markup language 961ML maximum likelihood 962MLAG multi-chassis link aggregation group 963MLC multi-level cell 964MLD multicast listener discovery 965MLHP micro loop heat pipe 966MMF multi-mode fiber 967MMIC monolithic microwave integrated circuit 968MMIO memory mapped input/output 969MMORPG massive multiplayer online role playing game 970MMRP multiple MAC registration protocol 971MMU memory management unit 972MMX matrix math extension 973MMX multimedia extension 974MMX multiple math extension 975MO magneto-optical 976MOESI modified, owned, exclusive, shared, invalid 977MOF maximum operating frequency 978MOSFET metal-oxide-semiconductor field-effect transistor 979MOSI modified, owned, shared, invalid 980MP multi-platform 981MP multiplayer 982MP {multiprocessing,multiprocessor} 983MPEG moving picture experts group 984MPI message passing interface 985MPLS Multiprotocol Label Switching 986MPP massively parallel processor 987MPS memory pool system 988MPS multiprocessor specification 989MQTT Message Queuing Telemetry Transport 990MR modem ready 991MRO method resolution order 992MRP multiple registration protocol 993MRU most recently used 994MS Microsoft 995MSAN Memory Sanitizer 996MSB most significant {bit,byte} 997MSC message sequence chart 998MSE mean square error 999MSF minutes seconds frames 1000MSI message signaled interrupt 1001MSI modified, shared, invalid 1002MSR {machine state,model-specific} register 1003MSS maximum segment size 1004MSTP Multiple Spanning Tree Protocol 1005MT machine translation 1006MTA mail transfer agent 1007MTBF mean time between failures 1008MTP media transfer protocol 1009MTRR memory type range register 1010MTTF mean time to failure 1011MTU maximum transmission unit 1012MUA mail user agent 1013MUD multi-user domain 1014MVCC multiversion concurrency control 1015MVR multicast VLAN registration 1016MVRP multiple VLAN registration protocol 1017MWE module width encoding 1018MX mail exchange 1019NACK negative acknowledgement 1020NAK negative acknowledgement 1021NAN neighbor awareness networking 1022NAN not a number 1023NAPT Network Address Port Translation 1024NAS network attached storage 1025NAT network address translation 1026NAV network allocation vector 1027NC numerical control 1028NC-SI network controller sideband interface 1029NCO numerically-controlled oscillator 1030NCP Network Control Protocol 1031NCSI network connectivity status indicator 1032NCQ native command queuing 1033ND neighbor discovery 1034NDFA nondeterministic finite automaton 1035NDIS network driver interface specification 1036NE numeric error 1037NEWS Network extensible Window System 1038NFA nondeterministic finite automaton 1039NFC near-field communication 1040NFCI no functional change intended 1041NFS network file system 1042NFV network function virtualization 1043NIA next instruction address 1044NIC network information center 1045NIC network interface card 1046NIDS network intrusion detection system 1047NIP network interface protocol 1048NIPS network intrusion prevention system 1049NIS network information service 1050NIST National Institute of Standards and Technology 1051NLS native language support 1052NMI non-maskable interrupt 1053NNTP Network News Transfer Protocol 1054NOC network operations center 1055NOP no operation 1056NOS network operating system 1057NP nondeterministic polynomial time 1058NRND not recommended for new designs 1059NRZ non-return to zero 1060NSA nation-state adversary 1061NSA no such agency 1062NSA National Security Agency 1063NTM non-deterministic Turing machine 1064NTP Network Time Protocol 1065NUMA non-uniform memory access 1066NURBS non-uniform rational basis spline 1067NVMM NetBSD Virtual Machine Monitor 1068NVMM non-volatile main memory 1069NVRAM non-volatile random access memory 1070NW not write-through 1071NX no execute 1072OAEP optimal asymmetric encryption padding 1073OAM operations, administration, and {management,maintenance} 1074OBO off by one 1075OBOE off by one error 1076OCL object constraint language 1077OCR optical character recognition 1078ODE offline device environment 1079ODI open data-link interface 1080ODM object data manager 1081ODCM on-demand clock modulation 1082ODT on-die termination 1083OEM original equipment manufacturer 1084OFB output feedback 1085OFDM orthogonal frequency division multiplexing 1086OFET organic field-effect transistor 1087OLAP online analytical processing 1088OLE object linking and embedding 1089OLTP online transaction processing 1090ONFI open nand flash interface 1091OO OpenOffice 1092OO object oriented 1093OOB out of band 1094OOE out of order execution 1095OOM out of memory 1096OOO OpenOffice.org 1097OOP object oriented programming 1098OOPS object oriented programming systems 1099OOSE object oriented software engineering 1100OPM operations per minute 1101OPS operations per second 1102OQL Object Query Language 1103ORB object request broker 1104ORM object-relational mapping 1105OS operating system 1106OSD object-based storage device 1107OSD open source definition 1108OSF open software foundation 1109OSI Open Source Initiative 1110OSI open systems interconnection 1111OSPF open shortest path first 1112OSPM OS power management 1113OSS open sound system 1114OSS open source software 1115OSVW operating system visible workarounds 1116OTP one time password 1117OTP open telecom platform 1118OU organizational unit 1119OUI organizationally unique identifier 1120OWL Web Ontology Language 1121P2P PCI to PCI 1122P2P peer to peer 1123PA phase accumulator 1124PA physical address 1125PAAS platform as a service 1126PAC phase-amplitude converter 1127PAE physical address extension 1128PAGP port aggregation protocol 1129PAL phase alternating line 1130PAL programmable array logic 1131PAM pluggable authentication modules 1132PAM pulse amplitude modulation 1133PAP password authentication protocol 1134PAT page attribute table 1135PAT port address translation 1136PATA parallel ATA 1137PAX portable archive exchange 1138PBE pending break encoding 1139PBE programming by example 1140PC personal computer 1141PC program counter 1142PCB printed circuit board 1143PCB process control block 1144PCB Protocol Control Block 1145PCBC propagating cipher block chaining 1146PCC Portable C Compiler 1147PCD page-level cache disable 1148PCE path computation element 1149PCE performance-monitor counter enable 1150PCEP Path Computation Element Protocol 1151PCH platform controller hub 1152PCI peripheral component interconnect 1153PCM phase change memory 1154PCM pulse code modulation 1155PCMCIA Personal Computer Memory Card International Association 1156PCP Port Control Protocol 1157PD public domain 1158PDA personal digital assistant 1159PDA pushdown automaton 1160PDAG propositional directed acyclic graph 1161PDB power distribution board 1162PDF portable document format 1163PDM pulse-duration modulation 1164PDN pull-down network 1165PDP page {descriptor,directory} page 1166PDS product data sheet 1167PDU protocol data unit 1168PE protection enable 1169PE provider edge 1170PEAP Protected EAP 1171PECI platform environment control interface 1172PEP protocol extension protocol 1173PER packed encoding rules 1174PFS perfect forward secrecy 1175PGAS partitioned global address space 1176PGE page global enable 1177PGP Pretty Good Privacy 1178PHB PCI host bridge 1179PHP PHP: Hypertext Preprocessor 1180PIC performance instrumentation counters 1181PIC position independent code 1182PIC programmable interrupt controller 1183PICNIC problem in chair, not in computer 1184PID process id 1185PIE position independent executable 1186PIL Priority Interrupt Level 1187PIM personal information manager 1188PIM platform-independent model 1189PIO programmed input/output 1190PIPT physically indexed, physically tagged 1191PIQ prefetch input queue 1192PIT programmable interrupt timer 1193PIV personal identity verification 1194PIX Private Internet eXchange 1195PKCS public-key cryptography standards 1196PKI public key infrastructure 1197PLC programmable logic controller 1198PLD programmable logic device 1199PLL phase locked loop 1200PLRU pseudo LRU 1201PLTM package level thermal management 1202PM power management 1203PM {phase,pulse} modulation 1204PMC performance monitoring counters 1205PME power management event 1206PMEG page map entry group 1207PMI performance monitoring infrastructure 1208PMI platform management interrupt 1209PMIC power management integrated circut 1210PMIO port-mapped input/output 1211PMT photo-multiplier tube 1212PMU performance monitoring units 1213PMU power management unit 1214PNG portable network graphics 1215PNP plug and play 1216POE power over ethernet 1217POF probability of failure 1218POP Post Office Protocol 1219POP power on password 1220POR plan of record 1221POSIX Portable Operating System Interface [for Unix] 1222POST power on self test 1223POTS plain old telephone system 1224POWER Performance Optimization With Enhanced RISC 1225POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1226PP pair programming 1227PPB PCI [to] PCI bridge 1228PPC PowerPC 1229PPC Power Performance Computing 1230PPI pixels per inch 1231PPM pages per minute 1232PPP Point-to-Point Protocol 1233PPPOA Point-to-Point Protocol over ATM 1234PPPOE Point-to-Point Protocol over Ethernet 1235PPR processor programming reference 1236PPT powerpoint 1237PPT punched paper tape 1238PPU physics processing unit 1239PRAM Parameter RAM 1240PRBS pseudorandom bit sequence 1241PRG pseudorandom generator 1242PRF pseudorandom function [family] 1243PRML partial response, maximum likelihood 1244PRN pseudorandom {noise,number} 1245PRNG pseudorandom number generator 1246PROM programmable read only memory 1247PRP pseudorandom permutation 1248PRU Programmable Realtime Unit 1249PS PostScript 1250PSD power spectral density 1251PSE page size extensions 1252PSK phase shift keying 1253PSK pre-shared key 1254PSTN public switched telephone network 1255PSW program status word 1256PTE page table entry 1257PTLA pseudo top level aggregator 1258PTP page table page 1259PTV perceived target value 1260PU processing unit 1261PUC personal unblocking code 1262PUN physical unit number 1263PV physical volume 1264PVC permanent virtual circuit 1265PVG physical volume group 1266PVI protected-mode virtual interrupt 1267PVRST Per-VLAN rapid spanning tree 1268PVST Per-VLAN Spanning Tree 1269PWM pulse width modulation 1270PXE preboot execution environment 1271QA quality assurance 1272QAM quadrature amplitude modulation 1273QAM quality assurance management 1274QBE query by example 1275QC quality control 1276QDI quasi delay insensitive 1277QCIF quarter common intermediate format 1278QOS quality of service 1279QVL qualified vendor list 1280R/O read only 1281R/W read/write 1282RA receiver address 1283RA remote assistance 1284RA resource affinity 1285RA router advertisement 1286RAD rapid application development 1287RADIUS remote authentication dial-in user service 1288RAID redundant array of {independent,inexpensive} disks 1289RAM random access memory 1290RAS reliability, availability and serviceability 1291RAS remote access service 1292RAS restartable atomic sequence 1293RAS row address strobe 1294RBF radial basis function 1295RBNF routing backus-naur form 1296RBT red-black tree 1297RC release candidate 1298RC remote control 1299RC run commands 1300RCS Revision Control System 1301RCS revision control system 1302RCU read, copy, update 1303RDB Rigid Disk Block 1304RDBMS relational database management system 1305RDF Resource Description Framework 1306RDM relational data model 1307RDMA remote direct memory access 1308RDP remote desktop protocol 1309RDRAM Rambus DRAM 1310RE regular expression 1311REPL read, evaluate, print, loop 1312REST representational state transfer 1313RF radio frequency 1314RFB remote frame buffer 1315RFI radio frequency interference 1316RFO request for ownership 1317RFU reserved for future use 1318RGB red green blue 1319RGBA red green blue alpha 1320RGMII reduced gigabit media independent interface 1321RH read hit 1322RHEL Red Hat Enterprise Linux 1323RHL Red Hat Linux 1324RIB routing information base 1325RIFF Resource Interchange File Format 1326RIP Raster Image Processor 1327RIP Routing Information Protocol 1328RIR regional Internet registry 1329RISC reduced instruction set {computer,computing} 1330RKM ROM Kernel Manual 1331RLE run length encoding 1332RLL run length limited 1333RLO right-to-left override 1334RM read miss 1335RMCP Remote Management Control Protocol 1336RMI remote method invocation 1337RMO Relaxed Memory Ordering 1338RMPM rapid memory power management 1339RMS root mean square 1340RMW read, modify, write 1341RNG random number generator 1342ROM read only memory 1343RPC remote procedure call 1344RPKI resource PKI 1345RPL requested privilege level 1346RPM revolutions per minute 1347RPN reverse Polish notation 1348RPVST Rapid Per-VLAN Spanning Tree 1349RR random replacement 1350RR round robin 1351RS relay station 1352RSA Rivest, Shamir, [and] Adleman 1353RSIP Realm Specific IP 1354RSN Robust Secure Network 1355RSS really simple syndication 1356RSS residual sum of squares 1357RSTP Rapid Spanning Tree Protocol 1358RT real time 1359RTC real time clock 1360RTC real time computing 1361RTF rich text format 1362RTL register transfer language 1363RTL resistor-transistor logic 1364RTL right to left 1365RTOS real time operating system 1366RTS request to send 1367RTT round trip time 1368RUP rational unified process 1369RW Rabin-Williams 1370RWM read-write memory 1371RX {receive,receiver} 1372S/PDIF Sony/Philips Digital Interface Format 1373SA security advisory 1374SA security association 1375SA source address 1376SA structured analysis 1377SAAS software as a service 1378SABRE Semi-automated business research environment 1379SACD super audio compact disc 1380SAD security association database 1381SAF-TE SCSI accessed fault-tolerant enclosure 1382SAGE Semi-automated ground environment 1383SAL {service,system} abstraction layer 1384SAM serial access memory 1385SAM sum addressed memory 1386SAML security assertion markup language 1387SAN storage area network 1388SAP service access point 1389SAPIC streamlined advanced programmable interrupt controller 1390SASD structured analysis, structured design 1391SASI Shugart Associates System Interface 1392SASL simple authentication [and] security layer 1393SATA serial advanced technology attachment 1394SAX simple API for XML 1395SB sound blaster 1396SBSA server base system architecture 1397SBU standard build unit 1398SC store conditional 1399SCA source code analyzer 1400SCADA supervisory control and data acquisition 1401SCC single chip cloud 1402SCC source code control 1403SCCP skinny call control protocol 1404SCCS Source Code Control System 1405SCI scalable coherent interface 1406SCI system control interrupt 1407SCM software configuration management 1408SCM source code management 1409SCM storage-class memory 1410SCO synchronous connection orientated 1411SCP secure copy 1412SCP system control processor 1413SCPI system control and power interface 1414SCSI Small Computer System Interface 1415SCTP Stream Control Transmission Protocol 1416SDDC software defined data center 1417SDEI software delegated exception interface 1418SDI symbol deinterleave 1419SDK software development kit 1420SDL Simple Declarative Language 1421SDL Simple Direct-media Layer 1422SDLC {software,system,systems} development life cycle 1423SDN software defined networking 1424SDP Session Description Protocol 1425SDR software defined radio 1426SDRAM synchronous dynamic random access memory 1427SDS software defined storage 1428SDT syntax-directed translation 1429SEA synchronous external abort 1430SEGV segmentation violation 1431SED self-encrypting drive 1432SED stream editor 1433SEMB serial ATA enclosure management bridge 1434SEO search engine optimization 1435SES SCSI enclosure services 1436SFC sequential function chart 1437SFI simple firmware interface 1438SFI software fault isolation 1439SFTP SSH File Transfer Protocol 1440SFTP Serial File Transfer Protocol 1441SFTP Simple File Transfer Protocol 1442SGI Silicon Graphics, Inc 1443SGI software generated interrupt 1444SGMII serial gigabit media independent interface 1445SGPIO serial general purpose input/output 1446SGRAM synchronous graphics random access memory 1447SHA secure hash algorithm 1448SICP structure and interpretation of computer programs 1449SIDH supersingular isogeny Diffie-Hellman 1450SIEM security information and event management 1451SIF source input format 1452SIFS short inter-frame space 1453SIM subscriber identity module 1454SIMD single instruction, multiple data 1455SIMM single inline memory module 1456SIP Session Initiation Protocol 1457SIR signal-to-interference ratio 1458SIR slow infrared 1459SISD single instruction, single data 1460SLAAC stateless address auto-configuration 1461SLC single-level cell 1462SLDRAM synchronous-link dynamic random access memory 1463SLED single large expensive disk 1464SLI scalable link interface 1465SLI scan-line interleave 1466SLIC system license internal code 1467SLOC source lines of code 1468SLRU segmented LRU 1469SMA smart memory access 1470SMAF system management action field 1471SMAP Simple Mail Access Protocol 1472SMAP supervisor mode access prevention 1473SMART self-monitoring analysis and reporting technology 1474SMB Server Message Block 1475SMB system management bus 1476SMBIOS System Management BIOS 1477SMC system management controller 1478SMD storage module device 1479SMEP supervisor mode execution protection 1480SMF single mode fiber 1481SMI structure of management information 1482SMI system management interrupt 1483SMM system management mode 1484SMP serial management protocol 1485SMP symmetric multiprocessing 1486SMT simultaneous multithreading 1487SMTP Simple Mail Transfer Protocol 1488SMU system management unit 1489SNA systems network architecture 1490SNAP Sub-Network Access Protocol 1491SNIA Storage Networking Industry Association 1492SNMP Simple Network Management Protocol 1493SNR signal-to-noise ratio 1494SOA service oriented architecture 1495SOAP Simple Object Access Protocol 1496SOC system on chip 1497SOF start of frame 1498SOH start of header 1499SOHO small office/home office 1500SOL serial over LAN 1501SOM system on module 1502SP service pack 1503SP stack pointer 1504SPA storage pool allocator 1505SPAN switched port analyzer 1506SPARC scalable processor architecture 1507SPARQL SPARQL Protocol and RDF Query Language 1508SPD security policy database 1509SPD serial presence detect 1510SPDIF Sony/Philips digital interface format 1511SPI serial peripheral interface 1512SPI stateful packet inspection 1513SPL system interrupt priority level 1514SPL spinlock 1515SPMD single process, multiple data 1516SPR special purpose register 1517SPT sectors per track 1518SQA software quality assurance 1519SQCIF sub quarter common intermediate format 1520SQL Structured Query Language 1521SRAM static random access memory 1522SRC sample rate conversion 1523SRP SCSI RDMA protocol 1524SRR shaped round robin 1525SS self-snoop 1526SS stack segment 1527SSA static single assignment 1528SSAP source service access point 1529SSB single-sideband modulation 1530SSC spread spectrum clock 1531SSD solid state drive 1532SSE streaming SIMD extensions 1533SSFDC solid state floppy disc card 1534SSH secure shell 1535SSI server side includes 1536SSID service set identifier 1537SSTP secure socket tunneling protocol 1538SSL secure sockets layer 1539SSP stack smashing protection 1540STC software thermal control 1541STD state transition diagram 1542STM software transactional memory 1543STOMP Streaming Text Oriented Messaging Protocol 1544STP Spanning Tree Protocol 1545STP shielded twisted pair 1546STRG spanning tree root guard 1547SUN Stanford University Network 1548SUS Single Unix Specification 1549SUT system under test 1550SVC switched virtual circuit 1551SVG scalable vector graphics 1552SVGA Super Video Graphics Array 1553SVI {switch,switched} virtual interface 1554SVM secure virtual machine 1555SVM support vector machine 1556SVR System V Release 1557SVS Separate Virtual Space 1558SWF Shockwave Flash 1559SWIG simplified wrapper [and] interface generator 1560SYR symbol timing recovery 1561TA test assertion 1562TA transmitter address 1563TACACS terminal access controller access-control system 1564TAI international atomic time 1565TAO track at once 1566TAOCP The Art of Computer Programming 1567TAP Test Anything Protocol 1568TAS test and set 1569TB terabyte 1570TBNF transitional backus-naur form 1571TCB trace capture buffer 1572TCB trusted computing base 1573TCC thermal control circuit 1574TCL tool command language 1575TCP Transmission Control Protocol 1576TCQ tagged command queueing 1577TDC time [to] digital converter 1578TDD test-driven development 1579TDD time division duplex 1580TDM time division multiplexing 1581TDMA time division multiple access 1582TDOA time difference of arrival 1583TDP thermal design {point,power} 1584TDR time-domain reflectometry 1585TECO Text Editor and Corrector 1586TFT thin film transistor 1587TFTP Trivial File Transfer Protocol 1588TIAS try it and see 1589TIFF tagged image file format 1590TITS try it to see 1591TK temporal key 1592TKIP Temporal Key Integrity Protocol 1593TLA top level aggregator 1594TLB translation lookaside buffer 1595TLD top level domain 1596TLER time-limited error recovery 1597TLI transport layer interface 1598TLS thread local storage 1599TLS transport layer security 1600TM Turing machine 1601TM thermal monitor 1602TMG transmogrifier 1603TMDS transition minimized differential signaling 1604TMO timeout 1605TOD time of day 1606TOS terms of service 1607TOS trusted operating system 1608TOS type of service 1609TP transaction processing 1610TPI tracks per inch 1611TPM transactions per minute 1612TPM trusted platform module 1613TPR task priority register 1614TPS transactions per second 1615TPS transmission parameters signaling 1616TR task register 1617TR token ring 1618TRL timing recovery loop 1619TRNG true random number generator 1620TS terminal services 1621TS time series 1622TS time stamp 1623TS transport stream 1624TSAN Thread Sanitizer 1625TSC time stamp counter 1626TSD time stamp disable 1627TSDB time series database 1628TSL test, set, lock 1629TSO time sharing option 1630TSO Total Store Ordering 1631TSP Time-Stamp Protocol 1632TSP Tunnel Setup Protocol 1633TSP time synchronization protocol 1634TSP traveling salesman problem 1635TSS task state segment 1636TTL time to live 1637TTL transistor-transistor logic 1638TTM translation table maps 1639TTY teletype 1640TUI {terminal,text-based,textual} user interface 1641TX {transmit out,transmitter} 1642TXG transaction group 1643TZ time zone 1644UAC user {access,account} control 1645UAF use-after-free 1646UART universal asynchronous receiver/transmitter 1647UAT user acceptance testing 1648UB undefined behavior 1649UBSAN Undefined Behavior Sanitizer 1650UC uncacheable 1651UCS uniform-cost search 1652UCS unified computing system 1653UCS universal coded character set 1654UDI uniform driver interface 1655UDMA ultra DMA 1656UDO ultra density optical 1657UDP User Datagram Protocol 1658UEFI unified extensible firmware interface 1659UFS Unix File System 1660UGA universal graphics adapter 1661UI unit interval 1662UI user interface 1663UICC universal integrated circuit card 1664UID unique identifier 1665UID user identifier 1666UL upload 1667UMA uniform memory access 1668UMA upper memory area 1669UMB upper memory block 1670UML unified modeling language 1671UMPC ultra-mobile PC 1672UPNP universal plug and play 1673UPS uninterruptible power supply 1674URI uniform resource identifier 1675URL uniform resource locator 1676URN uniform resource name 1677USART universal synchronous/asynchronous receiver/transmitter 1678USB universal serial bus 1679USWC uncacheable speculative write combining 1680UT unit test 1681UTC coordinated universal time 1682UTF unicode transformation formats 1683UTP unshielded twisted pair 1684UTS UNIX time-sharing 1685UUCP Unix-to-Unix Copy Protocol 1686UUID universally unique identifier 1687UUOC useless use of cat 1688UUT unit under test 1689UX user experience 1690VA vertical alignment 1691VA virtual address 1692VA volt-ampere 1693VAX virtual address extension 1694VB Visual Basic 1695VCA variable-gain amplifier 1696VCC common collector voltage 1697VCCP virtual chassis control protocol 1698VCF voltage-controlled filter 1699VCM virtual channel memory 1700VCO voltage-controlled oscillator 1701VCP virtual chassis port 1702VCS version control system 1703VDPAU Video Decode and Presentation API for Unix 1704VES virtual execution system 1705VESA Video Electronics Standards Association 1706VFO variable-frequency oscillator 1707VFS virtual file system 1708VG volume group 1709VGA Video Graphics Array 1710VHDCI very high density cable interconnect 1711VID {VLAN,voltage level} identifier 1712VIM Vi IMproved 1713VIPT virtually indexed, physically tagged 1714VIVT virtually indexed, virtually tagged 1715VLAN virtual local area network 1716VLD variable-length decoding 1717VLIW very long instruction word 1718VLSI very large scale integration 1719VLSM variable length subnet mask 1720VM virtual {machine,memory} 1721VME virtual mode extension 1722VMX vector multimedia extensions 1723VMX virtual machine extensions 1724VNC virtual network computing 1725VOD video on demand 1726VPD vital product data 1727VPN virtual private network 1728VPWS virtual private wire service 1729VR virtual reality 1730VRAM video random access memory 1731VRF virtual routing and forwarding 1732VRM voltage regulator module 1733VROC Virtual RAID On CPU 1734VRRP Virtual Router Redundancy Protocol 1735VSTP VLAN Spanning Tree Protocol 1736VTP VLAN Trunking Protocol 1737VXFS Veritas file sytem 1738VXVM Veritas volume manager 1739W watt 1740W3C World Wide Web Consortium 1741WAFL write anywhere file layout 1742WAMP Web Application Messaging Protocol 1743WAN wide area network 1744WAP Wireless Application Protocol 1745WAP wireless access point 1746WDM Windows Driver Model 1747WDDM Windows Display Driver Model 1748WDT watchdog timer 1749WEP Wired Equivalent Privacy 1750WFI wait for interrupt 1751WFQ weighted fair queuing 1752WH write hit 1753WHEA Windows hardware error architecture 1754WIFI wireless fidelity 1755WLAN wireless local area network 1756WM write miss 1757WMI Windows Management Instrumentation 1758WOL Wake-on-LAN 1759WOM Wake-on-Modem 1760WOR Wake-on-Ring 1761WORM write once read many 1762WP WordPerfect 1763WP word processor 1764WP write protect 1765WPA Wi-Fi Protected Access 1766WPA2 Wi-Fi Protected Access II 1767WPAD web proxy auto-discovery protocol 1768WPS Wi-Fi Protected Setup 1769WRAM window random access memory 1770WS web services 1771WTC write through caching 1772WTD weighted tail drop 1773WWAN wireless wide area network 1774WWW world wide web 1775WYSIAYG what you see is all you get 1776WYSIWYG what you see is what you get 1777XBAR crossbar 1778XDMCP X Display Manager control protocol 1779XER XML encoding rules 1780XGA Extended Graphics Array 1781XHR XMLHttpRequest 1782XIP execute in place 1783XML Extensible Markup Language 1784XNA XNA's not acronymed 1785XNS Xerox network systems 1786XOR exclusive or 1787XP extreme programming 1788XSI X/Open System Interface 1789XSL extensible stylesheet language 1790XSLT extensible stylesheet language transformations 1791XSS cross site scripting 1792XT extended technology 1793XTACACS extended terminal access controller access-control system 1794XTI X/Open transport interface 1795XUL XML user interface language 1796YACC yet another compiler compiler 1797YAML YAML ain't markup language 1798YANG yet another next generation 1799YAWPFAPR you are welcome; please file a problem report 1800YP Yellow Pages 1801YTD year to date 1802ZAP ZFS attribute processor 1803ZBR zone bit recording 1804ZFOD zero-filled on demand 1805ZFS zettabyte file system 1806ZIF zero insertion force 1807ZIFS zero insertion force socket 1808ZIL ZFS intent log 1809ZMA zone multicast address 1810ZOI zero one infinity 1811ZOI zone of influence 1812ZPL ZFS Posix layer 1813ZVOL ZFS Volume 1814