acronyms.comp revision 1.300
1$NetBSD: acronyms.comp,v 1.300 2020/03/26 18:28:09 leot 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 537ERC error recovery control 538ERD emergency recovery disk 539ERD entity relationship diagram 540ERE extended regular expression 541ERST error record serialization table 542ESAN Efficiency Sanitizer 543ESB enterprise service bus 544ESDI enhanced small disk interface 545ESDRAM enhanced synchronous dynamic random access memory 546ESI enclosure services interface 547ESS electronic switching system 548ESS extended service set 549ESSID extended service set identifier 550EST enhanced speedstep 551ETL extract, transform, load 552EU execution unit 553EULA end user license agreement 554FAT file allocation table 555FBRAM frame buffer random access memory 556FCIF full common intermediate format 557FCL fiber channel loop 558FCS frame check sequence 559FDC floppy disk controller 560FDD floppy disk drive 561FDDI fiber distributed data interface 562FDE full disk encryption 563FDT flattened device tree 564FEA finite element analysis 565FEC forward error correction 566FET field-effect transistor 567FF finite field 568FF form feed 569FFDH finite-field Diffie-Hellman 570FFH functional fixed hardware 571FFI foreign function interface 572FFM focus follows mouse 573FFS Fast File System 574FFS find first set 575FFT fast Fourier transform 576FG floating gate 577FHSS frequency hop spread spectrum 578FID frequency identifier 579FIFO first in, first out 580FILO first in, last out 581FIPS Federal Information Processing Standards 582FIR fast infrared 583FLOPS floating [point] operations per second 584FLOSS free/libre/open source software 585FM frequency modulation 586FMR false match rate 587FOSS free/open source software 588FPGA field programmable gate array 589FPM fast page mode 590FPR floating point register 591FPU floating point unit 592FQDN fully qualified domain name 593FRR false rejection rate 594FRU field replaceable unit 595FS file system 596FSB front side bus 597FSCK file system check 598FSF Free Software Foundation 599FSK frequency shift keying 600FSM finite-state machine 601FTA fault tree analysis 602FTL flash translation layer 603FTP File Transfer Protocol 604FTPS File Transfer Protocol Secure 605FUS fast user switching 606FWH firmware hub 607FWS folding white space 608GAL generic array logic 609GARP generic attribute registration protocol 610GAS generic address structure 611GC garbage collector 612GCM Galois counter mode 613GCR group-coded recording 614GDI Graphics Device Interface 615GDT global descriptor table 616GECOS general comprehensive operating supervisor 617GEM graphics environment manager 618GEM graphics execution manager 619GENA general event notification architecture 620GHC Glasgow Haskell compiler 621GHES generic hardware error source 622GIC generic interrupt controller 623GID group identifier 624GIF graphics interchange format 625GMCH graphics and memory controller hub 626GNU GNU's Not Unix 627GOP graphics output protocol 628GOT global offset table 629GPE general purpose event 630GPF general protection fault 631GPG GNU Privacy Guard 632GPL [GNU] General Public License 633GPR general purpose register 634GPS generalized processor sharing 635GPT GUID partition table 636GPU graphics processing unit 637GR golden ratio 638GRE generic routing encapsulation 639GSI global system interrupt 640GUI graphical user interface 641GUID globally unique identifier 642GVFS git virtual file system 643HA high availability 644HAL hardware abstraction layer 645HAT hashed array tree 646HATEOAS hypermedia as the engine of application state 647HBA host bus adapter 648HCF halt and catch fire 649HCI host controller interface 650HCI human-computer interaction 651HCL hardware compatibility list 652HDCP High-bandwidth Digital Content Protection 653HDD hard disk drive 654HDL hardware description language 655HDMI High-Definition Multimedia Interface 656HDTV high-definition television 657HECI host embedded controller interface 658HEST hardware error source table 659HEVC high efficiency video coding 660HF high frequency 661HFM highest frequency mode 662HFS hierarchical file system 663HID human interface device 664HKP HTTP Keyserver Protocol 665HLL high-level language 666HMA high memory area 667HMI human-machine interface 668HOOD hierarchical object oriented design 669HP Hewlett-Packard 670HPC high performance computing 671HPD hot plug detection 672HPET high precision event timer 673HSM hardware security module 674HSM hierarchical storage management 675HT hyper-threading 676HTC hardware thermal control 677HTCC high temperature co-fired ceramic 678HTML HyperText Markup Language 679HTT hyper-threading technology 680HTTP Hypertext Transfer Protocol 681HTTPS Hypertext Transfer Protocol Secure 682HVM hardware virtual machine 683HVDS High-Voltage Differential Signaling 684HWASAN Hardware-assisted Address Sanitizer 685HZ Hertz 686I2O intelligent input/output 687IA information assurance 688IAAS infrastructure as a service 689IANA Internet Assigned Numbers Authority 690IBC iterated block cipher 691IBM International Business Machines 692IBPI international blinking pattern interpretation 693IBS instruction based sampling 694IBSS independent basic service set 695IC integrated circuit 696ICA independent computer architecture 697ICACLS integrity control access control lists 698ICB Internet Citizen's Band 699ICE in-circuit emulator 700ICE internal compiler error 701ICH I/O controller hub 702ICMP Internet Control Message Protocol 703ICT information and communications technology 704ICW initialization command word 705IDA Intel dynamic acceleration 706IDCMP Intuition direct communication message port 707IDCT inverse discrete cosine transform 708IDE integrated development environment 709IDE integrated drive electronics 710IDPS intrusion detection [and] prevention system 711IDRP inter-domain routing protocol 712IDS intrusion detection system 713IDT interrupt descriptor table 714IE Internet Explorer 715IEC International Electrotechnical Commission 716IEEE Institute of Electrical and Electronics Engineers 717IESG Internet Engineering Steering Group 718IETF Internet Engineering Task Force 719IF intermediate frequency 720IFCM isochronous flow control mode 721IFF Interchange File Format 722IFS internal field separator 723IGD Internet gateway device 724IGMP Internet Group Management Protocol 725IGP interior gateway protocol 726IHV independent hardware vendor 727IKE Internet key exchange 728ILM internal loopback mode 729ILOM integrated lights-out management 730ILP instruction level parallelism 731IM instant messaging 732IMAP Internet Message Access Protocol 733IMC integrated memory controller 734IMCR interrupt mode configuration register 735IMR interrupt mask register 736IMS information management system 737IMSI international mobile subscriber identity 738INCITS InterNational Committee for Information Technology Standards 739INODE index node 740IO input/output 741IOCTL input/output control 742IOM input/output managers 743IOMMU input/output memory management unit 744IOT Internet of Things 745IP Internet Protocol 746IP intellectual property 747IPC instructions per cycle 748IPC interprocess communication 749IPCF interprocess communication facility 750IPE integrated programming environment 751IPI intelligent peripheral interface 752IPI interprocessor interrupt 753IPL Initial Program Load 754IPL Interrupt Priority Level 755IPMB Intelligent Platform Management Bus 756IPMI Intelligent Platform Management Interface 757IPNG Internet Protocol, Next Generation 758IPS in-plane switching 759IPS intrusion prevention system 760IPSEC Internet Protocol Security 761IRC Internet Relay Chat 762IRDA infrared data association 763IRDP ICMP Router Discovery Protocol 764IRQ interrupt request 765IRQL interrupt request level 766IRR interrupt request register 767IRTF Internet Research Task Force 768IS information system 769ISA industry standard architecture 770ISA instruction set architecture 771ISE instant secure erase 772ISDN integrated services digital network 773ISI inter-symbol interference 774ISL initial system load 775ISM industrial, scientific, [and] medical 776ISMS information system management system 777ISN initial serial number 778ISO International Standards Organization 779ISOC Internet Society 780ISP Internet service provider 781ISR in-service register 782ISR interrupt service routine 783IST internal spanning tree 784IST interrupt stack table 785ISV independent software vendor 786IT information technology 787ITB Intel Turbo Boost 788ITIL information technology infrastructure library 789ITP in-target probe 790ITSM IT service management 791IV initialization vector 792IVT interrupt vector table 793JBOD just a bunch of disks 794JCL Job Control Language 795JFET junction [gate] field-effect transistor 796JIT just in time 797JPEG Joint Photographic Experts Group 798JRE Java Runtime Environment 799JSON JavaScript Object Notation 800JTAG joint test action group 801KASLR kernel address space layout randomization 802KB keyboard 803KB kilobyte 804KBD keyboard 805KBD kilobaud 806KCS keyboard controller style 807KLOC thousand lines of code 808KMS kernel-mode setting 809KPI kernel programming interface 810KVA kernel virtual address 811KVM kernel virtual machine 812KVM kernel virtual memory 813KVM keyboard, video, [and] mouse 814L2CAP link layer control and adaptation protocol 815LAG link aggregation group 816LAMP Linux Apache MySQL {Perl,PHP,Python} 817LAN local area network 818LAPIC local advanced programmable interrupt controller 819LAR load access rights 820LBA logical block addressing 821LBNF labeled backus-naur form 822LBS location-based service 823LCD liquid crystal display 824LCP link control protocol 825LDA local delivery agent 826LDAP Lightweight Directory Access Protocol 827LDR light-dependent resistor 828LDT local descriptor table 829LE logical extent 830LED light emitting diode 831LELL low energy link layer 832LER label edge router 833LF line feed 834LF low frequency 835LFM lowest frequency mode 836LFN long file names 837LFO low-frequency oscillation 838LFS log-structured file system 839LFU least frequently used 840LHP loop heat pipe 841LIF logical interchange format 842LIFO last in, first out 843LILO LInux LOader 844LILO last in, last out 845LINT local interrupt 846LIR local Internet registry 847LISP LISt Processor 848LISP Locator/ID Separation Protocol 849LKM {Linux,loadable} kernel module 850LKML Linux kernel mailing list 851LL load linked 852LL/SC load linked/store conditional 853LLC logical link control 854LLD low-level design 855LLDD low-level design document 856LLDP link layer discovery protocol 857LLF low level format 858LLMNR link-local multicast name resolution 859LLVM Low Level Virtual Machine 860LM long mode 861LMCE local machine check exception 862LMI local management interface 863LMM link management mode 864LMP link management protocol 865LNO loop nest optimization 866LOC lines of code 867LOM lights-out management 868LPE Linux performance events 869LPC low pin count 870LPS local positioning system 871LRC longitudinal redundancy check 872LRM left-to-right mark 873LRO left-to-right override 874LRU least recently used 875LS link state 876LSAN Leak Sanitizer 877LSB Linux standards base 878LSB least significant {bit,byte} 879LSI large scale integration 880LSL load segment limit 881LSM log structured merge 882LSN Large Scale NAT 883LSN log sequence number 884LSR label switch router 885LTCC low temperature co-fired ceramic 886LTO linear tape-open 887LTO link time optimization 888LTR left to right 889LTR load task register 890LTR letter(-sized paper) 891LTS long term support 892LUA Lua Uppercase Accident 893LUN logical unit number 894LV logical volume 895LVM logical volume management 896LVT local vector table 897LVDS Low-Voltage Differential Signaling 898LWP light-weight process 899LZSS Lempel Ziv Storer Szymanski 900LZW Lempel Ziv Welch 901MAB MAC authentication bypass 902MAC mandatory access control 903MAC {media,medium} access control 904MAC message authentication {check,code} 905MADT multiple APIC descriptor table 906MAMR microwave-assisted magnetic recording 907MB megabyte 908MBA multi-boot agent 909MBR master boot record 910MBS megabits per second 911MC memory controller 912MCA machine check architecture 913MCA MicroChannel architecture 914MCC multiversion concurrency control 915MCE machine check exception 916MCGA Multi-Color Graphics Array 917MCH memory controller hub 918MCLAG multi-chassis link aggregation group 919MCM multi-chip module 920MCQ memory controlled queue 921MD machine-dependent 922MD-SAL model-driven service abstraction layer 923MDA mail delivery agent 924MDA Monochrome Display Adapter 925MDC Management Data Clock 926MDI Medium Dependent Interface 927MDI-X Medium Dependent Interface Crossover 928MDIO Management Data Input/Output 929MDMX MIPS Digital Media eXtension 930MDRAM multibank dynamic random access memory 931MESI modified, exclusive, shared, invalid 932MFC merge from current 933MFC Microsoft Foundation Classes 934MFM modified frequency modulation 935MFU most frequently used 936MGCP media gateway control protocol 937MHU message handling unit 938MI machine-independent 939MI machine interface 940MIB management information base 941MIC message integrity {check,code} 942MID mobile Internet device 943MIDI musical instrument digital interface 944MIF management information format 945MII media independent interface 946MIM man in the middle 947MIMD multiple instruction, multiple data 948MIME Multipurpose Internet Mail Extensions 949MIMO multiple input multiple output 950MIPS million instructions per second 951MIPS Microprocessor without Interlocked Pipeline Stages 952MISD multiple instruction, single data 953MIT Massachusetts Institute of Technology 954MITM man in the middle 955ML machine language 956ML machine learning 957ML mailing list 958ML markup language 959ML maximum likelihood 960MLAG multi-chassis link aggregation group 961MLC multi-level cell 962MLD multicast listener discovery 963MLHP micro loop heat pipe 964MMF multi-mode fiber 965MMIC monolithic microwave integrated circuit 966MMIO memory mapped input/output 967MMORPG massive multiplayer online role playing game 968MMRP multiple MAC registration protocol 969MMU memory management unit 970MMX matrix math extension 971MMX multimedia extension 972MMX multiple math extension 973MO magneto-optical 974MOESI modified, owned, exclusive, shared, invalid 975MOF maximum operating frequency 976MOSFET metal-oxide-semiconductor field-effect transistor 977MOSI modified, owned, shared, invalid 978MP multi-platform 979MP multiplayer 980MP {multiprocessing,multiprocessor} 981MPEG moving picture experts group 982MPI message passing interface 983MPLS Multiprotocol Label Switching 984MPP massively parallel processor 985MPS memory pool system 986MPS multiprocessor specification 987MQTT Message Queuing Telemetry Transport 988MR modem ready 989MRO method resolution order 990MRP multiple registration protocol 991MRU most recently used 992MS Microsoft 993MSAN Memory Sanitizer 994MSB most significant {bit,byte} 995MSC message sequence chart 996MSE mean square error 997MSF minutes seconds frames 998MSI message signaled interrupt 999MSI modified, shared, invalid 1000MSR {machine state,model-specific} register 1001MSS maximum segment size 1002MSTP Multiple Spanning Tree Protocol 1003MT machine translation 1004MTA mail transfer agent 1005MTBF mean time between failures 1006MTP media transfer protocol 1007MTRR memory type range register 1008MTTF mean time to failure 1009MTU maximum transmission unit 1010MUA mail user agent 1011MUD multi-user domain 1012MVCC multiversion concurrency control 1013MVR multicast VLAN registration 1014MVRP multiple VLAN registration protocol 1015MWE module width encoding 1016MX mail exchange 1017NACK negative acknowledgement 1018NAK negative acknowledgement 1019NAN neighbor awareness networking 1020NAN not a number 1021NAPT Network Address Port Translation 1022NAS network attached storage 1023NAT network address translation 1024NAV network allocation vector 1025NC numerical control 1026NC-SI network controller sideband interface 1027NCO numerically-controlled oscillator 1028NCP Network Control Protocol 1029NCSI network connectivity status indicator 1030NCQ native command queuing 1031ND neighbor discovery 1032NDFA nondeterministic finite automaton 1033NDIS network driver interface specification 1034NE numeric error 1035NEWS Network extensible Window System 1036NFA nondeterministic finite automaton 1037NFC near-field communication 1038NFCI no functional change intended 1039NFS network file system 1040NFV network function virtualization 1041NIA next instruction address 1042NIC network information center 1043NIC network interface card 1044NIDS network intrusion detection system 1045NIP network interface protocol 1046NIPS network intrusion prevention system 1047NIS network information service 1048NIST National Institute of Standards and Technology 1049NLS native language support 1050NMI non-maskable interrupt 1051NNTP Network News Transfer Protocol 1052NOC network operations center 1053NOP no operation 1054NOS network operating system 1055NP nondeterministic polynomial time 1056NRND not recommended for new designs 1057NRZ non-return to zero 1058NSA nation-state adversary 1059NSA no such agency 1060NSA National Security Agency 1061NTM non-deterministic Turing machine 1062NTP Network Time Protocol 1063NUMA non-uniform memory access 1064NURBS non-uniform rational basis spline 1065NVMM NetBSD Virtual Machine Monitor 1066NVMM non-volatile main memory 1067NVRAM non-volatile random access memory 1068NW not write-through 1069NX no execute 1070OAEP optimal asymmetric encryption padding 1071OAM operations, administration, and {management,maintenance} 1072OBO off by one 1073OBOE off by one error 1074OCL object constraint language 1075OCR optical character recognition 1076ODE offline device environment 1077ODI open data-link interface 1078ODM object data manager 1079ODCM on-demand clock modulation 1080ODT on-die termination 1081OEM original equipment manufacturer 1082OFB output feedback 1083OFDM orthogonal frequency division multiplexing 1084OFET organic field-effect transistor 1085OLAP online analytical processing 1086OLE object linking and embedding 1087OLTP online transaction processing 1088ONFI open nand flash interface 1089OO OpenOffice 1090OO object oriented 1091OOB out of band 1092OOE out of order execution 1093OOM out of memory 1094OOO OpenOffice.org 1095OOP object oriented programming 1096OOPS object oriented programming systems 1097OOSE object oriented software engineering 1098OPM operations per minute 1099OPS operations per second 1100OQL Object Query Language 1101ORB object request broker 1102ORM object-relational mapping 1103OS operating system 1104OSD object-based storage device 1105OSD open source definition 1106OSF open software foundation 1107OSI Open Source Initiative 1108OSI open systems interconnection 1109OSPF open shortest path first 1110OSPM OS power management 1111OSS open sound system 1112OSS open source software 1113OSVW operating system visible workarounds 1114OTP one time password 1115OTP open telecom platform 1116OU organizational unit 1117OUI organizationally unique identifier 1118OWL Web Ontology Language 1119P2P PCI to PCI 1120P2P peer to peer 1121PA phase accumulator 1122PA physical address 1123PAAS platform as a service 1124PAC phase-amplitude converter 1125PAE physical address extension 1126PAGP port aggregation protocol 1127PAL phase alternating line 1128PAL programmable array logic 1129PAM pluggable authentication modules 1130PAM pulse amplitude modulation 1131PAP password authentication protocol 1132PAT page attribute table 1133PAT port address translation 1134PATA parallel ATA 1135PAX portable archive exchange 1136PBE pending break encoding 1137PBE programming by example 1138PC personal computer 1139PC program counter 1140PCB printed circuit board 1141PCB process control block 1142PCB Protocol Control Block 1143PCBC propagating cipher block chaining 1144PCC Portable C Compiler 1145PCD page-level cache disable 1146PCE path computation element 1147PCE performance-monitor counter enable 1148PCEP Path Computation Element Protocol 1149PCH platform controller hub 1150PCI peripheral component interconnect 1151PCM phase change memory 1152PCM pulse code modulation 1153PCMCIA Personal Computer Memory Card International Association 1154PCP Port Control Protocol 1155PD public domain 1156PDA personal digital assistant 1157PDA pushdown automaton 1158PDAG propositional directed acyclic graph 1159PDB power distribution board 1160PDF portable document format 1161PDM pulse-duration modulation 1162PDN pull-down network 1163PDP page {descriptor,directory} page 1164PDS product data sheet 1165PDU protocol data unit 1166PE protection enable 1167PE provider edge 1168PEAP Protected EAP 1169PECI platform environment control interface 1170PEP protocol extension protocol 1171PER packed encoding rules 1172PFS perfect forward secrecy 1173PGAS partitioned global address space 1174PGE page global enable 1175PGP Pretty Good Privacy 1176PHB PCI host bridge 1177PHP PHP: Hypertext Preprocessor 1178PIC performance instrumentation counters 1179PIC position independent code 1180PIC programmable interrupt controller 1181PICNIC problem in chair, not in computer 1182PID process id 1183PIE position independent executable 1184PIL Priority Interrupt Level 1185PIM personal information manager 1186PIM platform-independent model 1187PIO programmed input/output 1188PIPT physically indexed, physically tagged 1189PIQ prefetch input queue 1190PIT programmable interrupt timer 1191PIV personal identity verification 1192PIX Private Internet eXchange 1193PKCS public-key cryptography standards 1194PKI public key infrastructure 1195PLC programmable logic controller 1196PLD programmable logic device 1197PLL phase locked loop 1198PLRU pseudo LRU 1199PLTM package level thermal management 1200PM power management 1201PM {phase,pulse} modulation 1202PMC performance monitoring counters 1203PME power management event 1204PMEG page map entry group 1205PMI performance monitoring infrastructure 1206PMI platform management interrupt 1207PMIC power management integrated circut 1208PMIO port-mapped input/output 1209PMT photo-multiplier tube 1210PMU performance monitoring units 1211PMU power management unit 1212PNG portable network graphics 1213PNP plug and play 1214POE power over ethernet 1215POF probability of failure 1216POP Post Office Protocol 1217POP power on password 1218POR plan of record 1219POSIX Portable Operating System Interface [for Unix] 1220POST power on self test 1221POTS plain old telephone system 1222POWER Performance Optimization With Enhanced RISC 1223POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1224PP pair programming 1225PPB PCI [to] PCI bridge 1226PPC PowerPC 1227PPC Power Performance Computing 1228PPI pixels per inch 1229PPM pages per minute 1230PPP Point-to-Point Protocol 1231PPPOA Point-to-Point Protocol over ATM 1232PPPOE Point-to-Point Protocol over Ethernet 1233PPR processor programming reference 1234PPT powerpoint 1235PPT punched paper tape 1236PPU physics processing unit 1237PRAM Parameter RAM 1238PRBS pseudorandom bit sequence 1239PRG pseudorandom generator 1240PRF pseudorandom function [family] 1241PRML partial response, maximum likelihood 1242PRN pseudorandom {noise,number} 1243PRNG pseudorandom number generator 1244PROM programmable read only memory 1245PRP pseudorandom permutation 1246PRU Programmable Realtime Unit 1247PS PostScript 1248PSD power spectral density 1249PSE page size extensions 1250PSK phase shift keying 1251PSK pre-shared key 1252PSTN public switched telephone network 1253PSW program status word 1254PTE page table entry 1255PTLA pseudo top level aggregator 1256PTP page table page 1257PTV perceived target value 1258PU processing unit 1259PUC personal unblocking code 1260PUN physical unit number 1261PV physical volume 1262PVC permanent virtual circuit 1263PVG physical volume group 1264PVI protected-mode virtual interrupt 1265PVRST Per-VLAN rapid spanning tree 1266PVST Per-VLAN Spanning Tree 1267PWM pulse width modulation 1268PXE preboot execution environment 1269QA quality assurance 1270QAM quadrature amplitude modulation 1271QAM quality assurance management 1272QBE query by example 1273QC quality control 1274QDI quasi delay insensitive 1275QCIF quarter common intermediate format 1276QOS quality of service 1277QVL qualified vendor list 1278R/O read only 1279R/W read/write 1280RA receiver address 1281RA remote assistance 1282RA resource affinity 1283RA router advertisement 1284RAD rapid application development 1285RADIUS remote authentication dial-in user service 1286RAID redundant array of {independent,inexpensive} disks 1287RAM random access memory 1288RAS reliability, availability and serviceability 1289RAS remote access service 1290RAS restartable atomic sequence 1291RAS row address strobe 1292RBF radial basis function 1293RBNF routing backus-naur form 1294RBT red-black tree 1295RC release candidate 1296RC remote control 1297RC run commands 1298RCS Revision Control System 1299RCS revision control system 1300RCU read, copy, update 1301RDB Rigid Disk Block 1302RDBMS relational database management system 1303RDF Resource Description Framework 1304RDM relational data model 1305RDMA remote direct memory access 1306RDP remote desktop protocol 1307RDRAM Rambus DRAM 1308RE regular expression 1309REPL read, evaluate, print, loop 1310REST representational state transfer 1311RF radio frequency 1312RFB remote frame buffer 1313RFI radio frequency interference 1314RFO request for ownership 1315RFU reserved for future use 1316RGB red green blue 1317RGBA red green blue alpha 1318RGMII reduced gigabit media independent interface 1319RH read hit 1320RHEL Red Hat Enterprise Linux 1321RHL Red Hat Linux 1322RIB routing information base 1323RIFF Resource Interchange File Format 1324RIP Raster Image Processor 1325RIP Routing Information Protocol 1326RIR regional Internet registry 1327RISC reduced instruction set {computer,computing} 1328RKM ROM Kernel Manual 1329RLE run length encoding 1330RLL run length limited 1331RLO right-to-left override 1332RM read miss 1333RMCP Remote Management Control Protocol 1334RMI remote method invocation 1335RMO Relaxed Memory Ordering 1336RMPM rapid memory power management 1337RMS root mean square 1338RMW read, modify, write 1339RNG random number generator 1340ROM read only memory 1341RPC remote procedure call 1342RPKI resource PKI 1343RPL requested privilege level 1344RPM revolutions per minute 1345RPN reverse Polish notation 1346RPVST Rapid Per-VLAN Spanning Tree 1347RR random replacement 1348RR round robin 1349RS relay station 1350RSA Rivest, Shamir, [and] Adleman 1351RSIP Realm Specific IP 1352RSN Robust Secure Network 1353RSS really simple syndication 1354RSS residual sum of squares 1355RSTP Rapid Spanning Tree Protocol 1356RT real time 1357RTC real time clock 1358RTC real time computing 1359RTF rich text format 1360RTL register transfer language 1361RTL resistor-transistor logic 1362RTL right to left 1363RTOS real time operating system 1364RTS request to send 1365RTT round trip time 1366RUP rational unified process 1367RW Rabin-Williams 1368RWM read-write memory 1369RX {receive,receiver} 1370S/PDIF Sony/Philips Digital Interface Format 1371SA security advisory 1372SA security association 1373SA source address 1374SA structured analysis 1375SAAS software as a service 1376SABRE Semi-automated business research environment 1377SACD super audio compact disc 1378SAD security association database 1379SAF-TE SCSI accessed fault-tolerant enclosure 1380SAGE Semi-automated ground environment 1381SAL {service,system} abstraction layer 1382SAM serial access memory 1383SAM sum addressed memory 1384SAML security assertion markup language 1385SAN storage area network 1386SAP service access point 1387SAPIC streamlined advanced programmable interrupt controller 1388SASD structured analysis, structured design 1389SASI Shugart Associates System Interface 1390SASL simple authentication [and] security layer 1391SATA serial advanced technology attachment 1392SAX simple API for XML 1393SB sound blaster 1394SBSA server base system architecture 1395SBU standard build unit 1396SC store conditional 1397SCA source code analyzer 1398SCADA supervisory control and data acquisition 1399SCC single chip cloud 1400SCC source code control 1401SCCP skinny call control protocol 1402SCCS Source Code Control System 1403SCI scalable coherent interface 1404SCI system control interrupt 1405SCM software configuration management 1406SCM source code management 1407SCM storage-class memory 1408SCO synchronous connection orientated 1409SCP secure copy 1410SCP system control processor 1411SCPI system control and power interface 1412SCSI Small Computer System Interface 1413SCTP Stream Control Transmission Protocol 1414SDDC software defined data center 1415SDEI software delegated exception interface 1416SDI symbol deinterleave 1417SDK software development kit 1418SDL Simple Declarative Language 1419SDL Simple Direct-media Layer 1420SDLC {software,system,systems} development life cycle 1421SDN software defined networking 1422SDP Session Description Protocol 1423SDR software defined radio 1424SDRAM synchronous dynamic random access memory 1425SDS software defined storage 1426SDT syntax-directed translation 1427SEA synchronous external abort 1428SEGV segmentation violation 1429SED self-encrypting drive 1430SED stream editor 1431SEMB serial ATA enclosure management bridge 1432SEO search engine optimization 1433SES SCSI enclosure services 1434SFC sequential function chart 1435SFI simple firmware interface 1436SFI software fault isolation 1437SFTP SSH File Transfer Protocol 1438SFTP Serial File Transfer Protocol 1439SFTP Simple File Transfer Protocol 1440SGI Silicon Graphics, Inc 1441SGI software generated interrupt 1442SGMII serial gigabit media independent interface 1443SGPIO serial general purpose input/output 1444SGRAM synchronous graphics random access memory 1445SHA secure hash algorithm 1446SICP structure and interpretation of computer programs 1447SIDH supersingular isogeny Diffie-Hellman 1448SIEM security information and event management 1449SIF source input format 1450SIFS short inter-frame space 1451SIM subscriber identity module 1452SIMD single instruction, multiple data 1453SIMM single inline memory module 1454SIP Session Initiation Protocol 1455SIR signal-to-interference ratio 1456SIR slow infrared 1457SISD single instruction, single data 1458SLAAC stateless address auto-configuration 1459SLC single-level cell 1460SLDRAM synchronous-link dynamic random access memory 1461SLED single large expensive disk 1462SLI scalable link interface 1463SLI scan-line interleave 1464SLIC system license internal code 1465SLOC source lines of code 1466SLRU segmented LRU 1467SMA smart memory access 1468SMAF system management action field 1469SMAP Simple Mail Access Protocol 1470SMAP supervisor mode access prevention 1471SMART self-monitoring analysis and reporting technology 1472SMB Server Message Block 1473SMB system management bus 1474SMBIOS System Management BIOS 1475SMC system management controller 1476SMD storage module device 1477SMEP supervisor mode execution protection 1478SMF single mode fiber 1479SMI structure of management information 1480SMI system management interrupt 1481SMM system management mode 1482SMP serial management protocol 1483SMP symmetric multiprocessing 1484SMT simultaneous multithreading 1485SMTP Simple Mail Transfer Protocol 1486SMU system management unit 1487SNA systems network architecture 1488SNAP Sub-Network Access Protocol 1489SNIA Storage Networking Industry Association 1490SNMP Simple Network Management Protocol 1491SNR signal-to-noise ratio 1492SOA service oriented architecture 1493SOAP Simple Object Access Protocol 1494SOC system on chip 1495SOF start of frame 1496SOH start of header 1497SOHO small office/home office 1498SOL serial over LAN 1499SOM system on module 1500SP service pack 1501SP stack pointer 1502SPA storage pool allocator 1503SPAN switched port analyzer 1504SPARC scalable processor architecture 1505SPARQL SPARQL Protocol and RDF Query Language 1506SPD security policy database 1507SPD serial presence detect 1508SPDIF Sony/Philips digital interface format 1509SPI serial peripheral interface 1510SPI stateful packet inspection 1511SPL system interrupt priority level 1512SPL spinlock 1513SPMD single process, multiple data 1514SPR special purpose register 1515SPT sectors per track 1516SQA software quality assurance 1517SQCIF sub quarter common intermediate format 1518SQL Structured Query Language 1519SRAM static random access memory 1520SRC sample rate conversion 1521SRP SCSI RDMA protocol 1522SRR shaped round robin 1523SS self-snoop 1524SS stack segment 1525SSA static single assignment 1526SSAP source service access point 1527SSB single-sideband modulation 1528SSC spread spectrum clock 1529SSD solid state drive 1530SSE streaming SIMD extensions 1531SSFDC solid state floppy disc card 1532SSH secure shell 1533SSI server side includes 1534SSID service set identifier 1535SSTP secure socket tunneling protocol 1536SSL secure sockets layer 1537SSP stack smashing protection 1538STC software thermal control 1539STD state transition diagram 1540STM software transactional memory 1541STOMP Streaming Text Oriented Messaging Protocol 1542STP Spanning Tree Protocol 1543STP shielded twisted pair 1544STRG spanning tree root guard 1545SUN Stanford University Network 1546SUS Single Unix Specification 1547SUT system under test 1548SVC switched virtual circuit 1549SVG scalable vector graphics 1550SVGA Super Video Graphics Array 1551SVI {switch,switched} virtual interface 1552SVM secure virtual machine 1553SVM support vector machine 1554SVR System V Release 1555SVS Separate Virtual Space 1556SWF Shockwave Flash 1557SWIG simplified wrapper [and] interface generator 1558SYR symbol timing recovery 1559TA test assertion 1560TA transmitter address 1561TACACS terminal access controller access-control system 1562TAI international atomic time 1563TAO track at once 1564TAOCP The Art of Computer Programming 1565TAP Test Anything Protocol 1566TAS test and set 1567TB terabyte 1568TBNF transitional backus-naur form 1569TCB trace capture buffer 1570TCB trusted computing base 1571TCC thermal control circuit 1572TCL tool command language 1573TCP Transmission Control Protocol 1574TCQ tagged command queueing 1575TDC time [to] digital converter 1576TDD test-driven development 1577TDD time division duplex 1578TDM time division multiplexing 1579TDMA time division multiple access 1580TDOA time difference of arrival 1581TDP thermal design {point,power} 1582TDR time-domain reflectometry 1583TECO Text Editor and Corrector 1584TFT thin film transistor 1585TFTP Trivial File Transfer Protocol 1586TIAS try it and see 1587TIFF tagged image file format 1588TITS try it to see 1589TK temporal key 1590TKIP Temporal Key Integrity Protocol 1591TLA top level aggregator 1592TLB translation lookaside buffer 1593TLD top level domain 1594TLER time-limited error recovery 1595TLI transport layer interface 1596TLS thread local storage 1597TLS transport layer security 1598TM Turing machine 1599TM thermal monitor 1600TMG transmogrifier 1601TMDS transition minimized differential signaling 1602TMO timeout 1603TOD time of day 1604TOS terms of service 1605TOS trusted operating system 1606TOS type of service 1607TP transaction processing 1608TPI tracks per inch 1609TPM transactions per minute 1610TPM trusted platform module 1611TPR task priority register 1612TPS transactions per second 1613TPS transmission parameters signaling 1614TR task register 1615TR token ring 1616TRL timing recovery loop 1617TRNG true random number generator 1618TS terminal services 1619TS time series 1620TS time stamp 1621TS transport stream 1622TSAN Thread Sanitizer 1623TSC time stamp counter 1624TSD time stamp disable 1625TSDB time series database 1626TSL test, set, lock 1627TSO time sharing option 1628TSO Total Store Ordering 1629TSP Time-Stamp Protocol 1630TSP Tunnel Setup Protocol 1631TSP time synchronization protocol 1632TSP traveling salesman problem 1633TSS task state segment 1634TTL time to live 1635TTL transistor-transistor logic 1636TTM translation table maps 1637TTY teletype 1638TUI {terminal,text-based,textual} user interface 1639TX {transmit out,transmitter} 1640TXG transaction group 1641TZ time zone 1642UAC user {access,account} control 1643UAF use-after-free 1644UART universal asynchronous receiver/transmitter 1645UAT user acceptance testing 1646UB undefined behavior 1647UBSAN Undefined Behavior Sanitizer 1648UC uncacheable 1649UCS uniform-cost search 1650UCS unified computing system 1651UCS universal coded character set 1652UDI uniform driver interface 1653UDMA ultra DMA 1654UDO ultra density optical 1655UDP User Datagram Protocol 1656UEFI unified extensible firmware interface 1657UFS Unix File System 1658UGA universal graphics adapter 1659UI unit interval 1660UI user interface 1661UICC universal integrated circuit card 1662UID unique identifier 1663UID user identifier 1664UL upload 1665UMA uniform memory access 1666UMA upper memory area 1667UMB upper memory block 1668UML unified modeling language 1669UMPC ultra-mobile PC 1670UPNP universal plug and play 1671UPS uninterruptible power supply 1672URI uniform resource identifier 1673URL uniform resource locator 1674URN uniform resource name 1675USART universal synchronous/asynchronous receiver/transmitter 1676USB universal serial bus 1677USWC uncacheable speculative write combining 1678UT unit test 1679UTC coordinated universal time 1680UTF unicode transformation formats 1681UTP unshielded twisted pair 1682UTS UNIX time-sharing 1683UUCP Unix-to-Unix Copy Protocol 1684UUID universally unique identifier 1685UUOC useless use of cat 1686UUT unit under test 1687UX user experience 1688VA vertical alignment 1689VA virtual address 1690VA volt-ampere 1691VAX virtual address extension 1692VB Visual Basic 1693VCA variable-gain amplifier 1694VCC common collector voltage 1695VCCP virtual chassis control protocol 1696VCF voltage-controlled filter 1697VCM virtual channel memory 1698VCO voltage-controlled oscillator 1699VCP virtual chassis port 1700VCS version control system 1701VDPAU Video Decode and Presentation API for Unix 1702VES virtual execution system 1703VESA Video Electronics Standards Association 1704VFO variable-frequency oscillator 1705VFS virtual file system 1706VG volume group 1707VGA Video Graphics Array 1708VHDCI very high density cable interconnect 1709VID {VLAN,voltage level} identifier 1710VIM Vi IMproved 1711VIPT virtually indexed, physically tagged 1712VIVT virtually indexed, virtually tagged 1713VLAN virtual local area network 1714VLD variable-length decoding 1715VLIW very long instruction word 1716VLSI very large scale integration 1717VLSM variable length subnet mask 1718VM virtual {machine,memory} 1719VME virtual mode extension 1720VMX vector multimedia extensions 1721VMX virtual machine extensions 1722VNC virtual network computing 1723VOD video on demand 1724VPD vital product data 1725VPN virtual private network 1726VPWS virtual private wire service 1727VR virtual reality 1728VRAM video random access memory 1729VRF virtual routing and forwarding 1730VRM voltage regulator module 1731VROC Virtual RAID On CPU 1732VRRP Virtual Router Redundancy Protocol 1733VSTP VLAN Spanning Tree Protocol 1734VTP VLAN Trunking Protocol 1735VXFS Veritas file sytem 1736VXVM Veritas volume manager 1737W watt 1738W3C World Wide Web Consortium 1739WAFL write anywhere file layout 1740WAMP Web Application Messaging Protocol 1741WAN wide area network 1742WAP Wireless Application Protocol 1743WAP wireless access point 1744WDM Windows Driver Model 1745WDDM Windows Display Driver Model 1746WDT watchdog timer 1747WEP Wired Equivalent Privacy 1748WFI wait for interrupt 1749WFQ weighted fair queuing 1750WH write hit 1751WHEA Windows hardware error architecture 1752WIFI wireless fidelity 1753WLAN wireless local area network 1754WM write miss 1755WMI Windows Management Instrumentation 1756WOL Wake-on-LAN 1757WOM Wake-on-Modem 1758WOR Wake-on-Ring 1759WORM write once read many 1760WP WordPerfect 1761WP word processor 1762WP write protect 1763WPA Wi-Fi Protected Access 1764WPA2 Wi-Fi Protected Access II 1765WPAD web proxy auto-discovery protocol 1766WPS Wi-Fi Protected Setup 1767WRAM window random access memory 1768WS web services 1769WTC write through caching 1770WTD weighted tail drop 1771WWAN wireless wide area network 1772WWW world wide web 1773WYSIAYG what you see is all you get 1774WYSIWYG what you see is what you get 1775XBAR crossbar 1776XDMCP X Display Manager control protocol 1777XER XML encoding rules 1778XGA Extended Graphics Array 1779XHR XMLHttpRequest 1780XIP execute in place 1781XML Extensible Markup Language 1782XNA XNA's not acronymed 1783XNS Xerox network systems 1784XOR exclusive or 1785XP extreme programming 1786XSI X/Open System Interface 1787XSL extensible stylesheet language 1788XSLT extensible stylesheet language transformations 1789XSS cross site scripting 1790XT extended technology 1791XTACACS extended terminal access controller access-control system 1792XTI X/Open transport interface 1793XUL XML user interface language 1794YACC yet another compiler compiler 1795YAML YAML ain't markup language 1796YANG yet another next generation 1797YAWPFAPR you are welcome; please file a problem report 1798YP Yellow Pages 1799YTD year to date 1800ZAP ZFS attribute processor 1801ZBR zone bit recording 1802ZFOD zero-filled on demand 1803ZFS zettabyte file system 1804ZIF zero insertion force 1805ZIFS zero insertion force socket 1806ZIL ZFS intent log 1807ZMA zone multicast address 1808ZOI zero one infinity 1809ZOI zone of influence 1810ZPL ZFS Posix layer 1811ZVOL ZFS Volume 1812