acronyms.comp revision 1.299
1$NetBSD: acronyms.comp,v 1.299 2020/02/26 23:38:08 sevan 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 671HPET high precision event timer 672HSM hardware security module 673HSM hierarchical storage management 674HT hyper-threading 675HTC hardware thermal control 676HTCC high temperature co-fired ceramic 677HTML HyperText Markup Language 678HTT hyper-threading technology 679HTTP Hypertext Transfer Protocol 680HTTPS Hypertext Transfer Protocol Secure 681HVM hardware virtual machine 682HVDS High-Voltage Differential Signaling 683HWASAN Hardware-assisted Address Sanitizer 684HZ Hertz 685I2O intelligent input/output 686IA information assurance 687IAAS infrastructure as a service 688IANA Internet Assigned Numbers Authority 689IBC iterated block cipher 690IBM International Business Machines 691IBPI international blinking pattern interpretation 692IBS instruction based sampling 693IBSS independent basic service set 694IC integrated circuit 695ICA independent computer architecture 696ICACLS integrity control access control lists 697ICB Internet Citizen's Band 698ICE in-circuit emulator 699ICE internal compiler error 700ICH I/O controller hub 701ICMP Internet Control Message Protocol 702ICT information and communications technology 703ICW initialization command word 704IDA Intel dynamic acceleration 705IDCMP Intuition direct communication message port 706IDCT inverse discrete cosine transform 707IDE integrated development environment 708IDE integrated drive electronics 709IDPS intrusion detection [and] prevention system 710IDRP inter-domain routing protocol 711IDS intrusion detection system 712IDT interrupt descriptor table 713IE Internet Explorer 714IEC International Electrotechnical Commission 715IEEE Institute of Electrical and Electronics Engineers 716IESG Internet Engineering Steering Group 717IETF Internet Engineering Task Force 718IF intermediate frequency 719IFCM isochronous flow control mode 720IFF Interchange File Format 721IFS internal field separator 722IGD Internet gateway device 723IGMP Internet Group Management Protocol 724IGP interior gateway protocol 725IHV independent hardware vendor 726IKE Internet key exchange 727ILM internal loopback mode 728ILOM integrated lights-out management 729ILP instruction level parallelism 730IM instant messaging 731IMAP Internet Message Access Protocol 732IMC integrated memory controller 733IMCR interrupt mode configuration register 734IMR interrupt mask register 735IMS information management system 736IMSI international mobile subscriber identity 737INCITS InterNational Committee for Information Technology Standards 738INODE index node 739IO input/output 740IOCTL input/output control 741IOM input/output managers 742IOMMU input/output memory management unit 743IOT Internet of Things 744IP Internet Protocol 745IP intellectual property 746IPC instructions per cycle 747IPC interprocess communication 748IPCF interprocess communication facility 749IPE integrated programming environment 750IPI intelligent peripheral interface 751IPI interprocessor interrupt 752IPL Initial Program Load 753IPL Interrupt Priority Level 754IPMB Intelligent Platform Management Bus 755IPMI Intelligent Platform Management Interface 756IPNG Internet Protocol, Next Generation 757IPS in-plane switching 758IPS intrusion prevention system 759IPSEC Internet Protocol Security 760IRC Internet Relay Chat 761IRDA infrared data association 762IRDP ICMP Router Discovery Protocol 763IRQ interrupt request 764IRQL interrupt request level 765IRR interrupt request register 766IRTF Internet Research Task Force 767IS information system 768ISA industry standard architecture 769ISA instruction set architecture 770ISE instant secure erase 771ISDN integrated services digital network 772ISI inter-symbol interference 773ISL initial system load 774ISM industrial, scientific, [and] medical 775ISMS information system management system 776ISN initial serial number 777ISO International Standards Organization 778ISOC Internet Society 779ISP Internet service provider 780ISR in-service register 781ISR interrupt service routine 782IST internal spanning tree 783IST interrupt stack table 784ISV independent software vendor 785IT information technology 786ITB Intel Turbo Boost 787ITIL information technology infrastructure library 788ITP in-target probe 789ITSM IT service management 790IV initialization vector 791IVT interrupt vector table 792JBOD just a bunch of disks 793JCL Job Control Language 794JFET junction [gate] field-effect transistor 795JIT just in time 796JPEG Joint Photographic Experts Group 797JRE Java Runtime Environment 798JSON JavaScript Object Notation 799JTAG joint test action group 800KASLR kernel address space layout randomization 801KB keyboard 802KB kilobyte 803KBD keyboard 804KBD kilobaud 805KCS keyboard controller style 806KLOC thousand lines of code 807KMS kernel-mode setting 808KPI kernel programming interface 809KVA kernel virtual address 810KVM kernel virtual machine 811KVM kernel virtual memory 812KVM keyboard, video, [and] mouse 813L2CAP link layer control and adaptation protocol 814LAG link aggregation group 815LAMP Linux Apache MySQL {Perl,PHP,Python} 816LAN local area network 817LAPIC local advanced programmable interrupt controller 818LAR load access rights 819LBA logical block addressing 820LBNF labeled backus-naur form 821LBS location-based service 822LCD liquid crystal display 823LCP link control protocol 824LDA local delivery agent 825LDAP Lightweight Directory Access Protocol 826LDR light-dependent resistor 827LDT local descriptor table 828LE logical extent 829LED light emitting diode 830LELL low energy link layer 831LER label edge router 832LF line feed 833LF low frequency 834LFM lowest frequency mode 835LFN long file names 836LFO low-frequency oscillation 837LFS log-structured file system 838LFU least frequently used 839LHP loop heat pipe 840LIF logical interchange format 841LIFO last in, first out 842LILO LInux LOader 843LILO last in, last out 844LINT local interrupt 845LIR local Internet registry 846LISP LISt Processor 847LISP Locator/ID Separation Protocol 848LKM {Linux,loadable} kernel module 849LKML Linux kernel mailing list 850LL load linked 851LL/SC load linked/store conditional 852LLC logical link control 853LLD low-level design 854LLDD low-level design document 855LLDP link layer discovery protocol 856LLF low level format 857LLMNR link-local multicast name resolution 858LLVM Low Level Virtual Machine 859LM long mode 860LMCE local machine check exception 861LMI local management interface 862LMM link management mode 863LMP link management protocol 864LNO loop nest optimization 865LOC lines of code 866LOM lights-out management 867LPE Linux performance events 868LPC low pin count 869LPS local positioning system 870LRC longitudinal redundancy check 871LRM left-to-right mark 872LRO left-to-right override 873LRU least recently used 874LS link state 875LSAN Leak Sanitizer 876LSB Linux standards base 877LSB least significant {bit,byte} 878LSI large scale integration 879LSL load segment limit 880LSM log structured merge 881LSN Large Scale NAT 882LSN log sequence number 883LSR label switch router 884LTCC low temperature co-fired ceramic 885LTO linear tape-open 886LTO link time optimization 887LTR left to right 888LTR load task register 889LTR letter(-sized paper) 890LTS long term support 891LUA Lua Uppercase Accident 892LUN logical unit number 893LV logical volume 894LVM logical volume management 895LVT local vector table 896LVDS Low-Voltage Differential Signaling 897LWP light-weight process 898LZSS Lempel Ziv Storer Szymanski 899LZW Lempel Ziv Welch 900MAB MAC authentication bypass 901MAC mandatory access control 902MAC {media,medium} access control 903MAC message authentication {check,code} 904MADT multiple APIC descriptor table 905MAMR microwave-assisted magnetic recording 906MB megabyte 907MBA multi-boot agent 908MBR master boot record 909MBS megabits per second 910MC memory controller 911MCA machine check architecture 912MCA MicroChannel architecture 913MCC multiversion concurrency control 914MCE machine check exception 915MCGA Multi-Color Graphics Array 916MCH memory controller hub 917MCLAG multi-chassis link aggregation group 918MCM multi-chip module 919MCQ memory controlled queue 920MD machine-dependent 921MD-SAL model-driven service abstraction layer 922MDA mail delivery agent 923MDA Monochrome Display Adapter 924MDC Management Data Clock 925MDI Medium Dependent Interface 926MDI-X Medium Dependent Interface Crossover 927MDIO Management Data Input/Output 928MDMX MIPS Digital Media eXtension 929MDRAM multibank dynamic random access memory 930MESI modified, exclusive, shared, invalid 931MFC merge from current 932MFC Microsoft Foundation Classes 933MFM modified frequency modulation 934MFU most frequently used 935MGCP media gateway control protocol 936MHU message handling unit 937MI machine-independent 938MI machine interface 939MIB management information base 940MIC message integrity {check,code} 941MID mobile Internet device 942MIDI musical instrument digital interface 943MIF management information format 944MII media independent interface 945MIM man in the middle 946MIMD multiple instruction, multiple data 947MIME Multipurpose Internet Mail Extensions 948MIMO multiple input multiple output 949MIPS million instructions per second 950MIPS Microprocessor without Interlocked Pipeline Stages 951MISD multiple instruction, single data 952MIT Massachusetts Institute of Technology 953MITM man in the middle 954ML machine language 955ML machine learning 956ML mailing list 957ML markup language 958ML maximum likelihood 959MLAG multi-chassis link aggregation group 960MLC multi-level cell 961MLD multicast listener discovery 962MLHP micro loop heat pipe 963MMF multi-mode fiber 964MMIC monolithic microwave integrated circuit 965MMIO memory mapped input/output 966MMORPG massive multiplayer online role playing game 967MMRP multiple MAC registration protocol 968MMU memory management unit 969MMX matrix math extension 970MMX multimedia extension 971MMX multiple math extension 972MO magneto-optical 973MOESI modified, owned, exclusive, shared, invalid 974MOF maximum operating frequency 975MOSFET metal-oxide-semiconductor field-effect transistor 976MOSI modified, owned, shared, invalid 977MP multi-platform 978MP multiplayer 979MP {multiprocessing,multiprocessor} 980MPEG moving picture experts group 981MPI message passing interface 982MPLS Multiprotocol Label Switching 983MPP massively parallel processor 984MPS memory pool system 985MPS multiprocessor specification 986MQTT Message Queuing Telemetry Transport 987MR modem ready 988MRO method resolution order 989MRP multiple registration protocol 990MRU most recently used 991MS Microsoft 992MSAN Memory Sanitizer 993MSB most significant {bit,byte} 994MSC message sequence chart 995MSE mean square error 996MSF minutes seconds frames 997MSI message signaled interrupt 998MSI modified, shared, invalid 999MSR {machine state,model-specific} register 1000MSS maximum segment size 1001MSTP Multiple Spanning Tree Protocol 1002MT machine translation 1003MTA mail transfer agent 1004MTBF mean time between failures 1005MTP media transfer protocol 1006MTRR memory type range register 1007MTTF mean time to failure 1008MTU maximum transmission unit 1009MUA mail user agent 1010MUD multi-user domain 1011MVCC multiversion concurrency control 1012MVR multicast VLAN registration 1013MVRP multiple VLAN registration protocol 1014MWE module width encoding 1015MX mail exchange 1016NACK negative acknowledgement 1017NAK negative acknowledgement 1018NAN neighbor awareness networking 1019NAN not a number 1020NAPT Network Address Port Translation 1021NAS network attached storage 1022NAT network address translation 1023NAV network allocation vector 1024NC numerical control 1025NC-SI network controller sideband interface 1026NCO numerically-controlled oscillator 1027NCP Network Control Protocol 1028NCSI network connectivity status indicator 1029NCQ native command queuing 1030ND neighbor discovery 1031NDFA nondeterministic finite automaton 1032NDIS network driver interface specification 1033NE numeric error 1034NEWS Network extensible Window System 1035NFA nondeterministic finite automaton 1036NFC near-field communication 1037NFCI no functional change intended 1038NFS network file system 1039NFV network function virtualization 1040NIA next instruction address 1041NIC network information center 1042NIC network interface card 1043NIDS network intrusion detection system 1044NIP network interface protocol 1045NIPS network intrusion prevention system 1046NIS network information service 1047NIST National Institute of Standards and Technology 1048NLS native language support 1049NMI non-maskable interrupt 1050NNTP Network News Transfer Protocol 1051NOC network operations center 1052NOP no operation 1053NOS network operating system 1054NP nondeterministic polynomial time 1055NRND not recommended for new designs 1056NRZ non-return to zero 1057NSA nation-state adversary 1058NSA no such agency 1059NSA National Security Agency 1060NTM non-deterministic Turing machine 1061NTP Network Time Protocol 1062NUMA non-uniform memory access 1063NURBS non-uniform rational basis spline 1064NVMM NetBSD Virtual Machine Monitor 1065NVMM non-volatile main memory 1066NVRAM non-volatile random access memory 1067NW not write-through 1068NX no execute 1069OAEP optimal asymmetric encryption padding 1070OAM operations, administration, and {management,maintenance} 1071OBO off by one 1072OBOE off by one error 1073OCL object constraint language 1074OCR optical character recognition 1075ODE offline device environment 1076ODI open data-link interface 1077ODM object data manager 1078ODCM on-demand clock modulation 1079ODT on-die termination 1080OEM original equipment manufacturer 1081OFB output feedback 1082OFDM orthogonal frequency division multiplexing 1083OFET organic field-effect transistor 1084OLAP online analytical processing 1085OLE object linking and embedding 1086OLTP online transaction processing 1087ONFI open nand flash interface 1088OO OpenOffice 1089OO object oriented 1090OOB out of band 1091OOE out of order execution 1092OOM out of memory 1093OOO OpenOffice.org 1094OOP object oriented programming 1095OOPS object oriented programming systems 1096OOSE object oriented software engineering 1097OPM operations per minute 1098OPS operations per second 1099OQL Object Query Language 1100ORB object request broker 1101ORM object-relational mapping 1102OS operating system 1103OSD object-based storage device 1104OSD open source definition 1105OSF open software foundation 1106OSI Open Source Initiative 1107OSI open systems interconnection 1108OSPF open shortest path first 1109OSPM OS power management 1110OSS open sound system 1111OSS open source software 1112OSVW operating system visible workarounds 1113OTP one time password 1114OTP open telecom platform 1115OU organizational unit 1116OUI organizationally unique identifier 1117OWL Web Ontology Language 1118P2P PCI to PCI 1119P2P peer to peer 1120PA phase accumulator 1121PA physical address 1122PAAS platform as a service 1123PAC phase-amplitude converter 1124PAE physical address extension 1125PAGP port aggregation protocol 1126PAL phase alternating line 1127PAL programmable array logic 1128PAM pluggable authentication modules 1129PAM pulse amplitude modulation 1130PAP password authentication protocol 1131PAT page attribute table 1132PAT port address translation 1133PATA parallel ATA 1134PAX portable archive exchange 1135PBE pending break encoding 1136PBE programming by example 1137PC personal computer 1138PC program counter 1139PCB printed circuit board 1140PCB process control block 1141PCB Protocol Control Block 1142PCBC propagating cipher block chaining 1143PCC Portable C Compiler 1144PCD page-level cache disable 1145PCE path computation element 1146PCE performance-monitor counter enable 1147PCEP Path Computation Element Protocol 1148PCH platform controller hub 1149PCI peripheral component interconnect 1150PCM phase change memory 1151PCM pulse code modulation 1152PCMCIA Personal Computer Memory Card International Association 1153PCP Port Control Protocol 1154PD public domain 1155PDA personal digital assistant 1156PDA pushdown automaton 1157PDAG propositional directed acyclic graph 1158PDB power distribution board 1159PDF portable document format 1160PDM pulse-duration modulation 1161PDN pull-down network 1162PDP page {descriptor,directory} page 1163PDS product data sheet 1164PDU protocol data unit 1165PE protection enable 1166PE provider edge 1167PEAP Protected EAP 1168PECI platform environment control interface 1169PEP protocol extension protocol 1170PER packed encoding rules 1171PFS perfect forward secrecy 1172PGAS partitioned global address space 1173PGE page global enable 1174PGP Pretty Good Privacy 1175PHB PCI host bridge 1176PHP PHP: Hypertext Preprocessor 1177PIC performance instrumentation counters 1178PIC position independent code 1179PIC programmable interrupt controller 1180PICNIC problem in chair, not in computer 1181PID process id 1182PIE position independent executable 1183PIL Priority Interrupt Level 1184PIM personal information manager 1185PIM platform-independent model 1186PIO programmed input/output 1187PIPT physically indexed, physically tagged 1188PIQ prefetch input queue 1189PIT programmable interrupt timer 1190PIV personal identity verification 1191PIX Private Internet eXchange 1192PKCS public-key cryptography standards 1193PKI public key infrastructure 1194PLC programmable logic controller 1195PLD programmable logic device 1196PLL phase locked loop 1197PLRU pseudo LRU 1198PLTM package level thermal management 1199PM power management 1200PM {phase,pulse} modulation 1201PMC performance monitoring counters 1202PME power management event 1203PMEG page map entry group 1204PMI performance monitoring infrastructure 1205PMI platform management interrupt 1206PMIC power management integrated circut 1207PMIO port-mapped input/output 1208PMT photo-multiplier tube 1209PMU performance monitoring units 1210PMU power management unit 1211PNG portable network graphics 1212PNP plug and play 1213POE power over ethernet 1214POF probability of failure 1215POP Post Office Protocol 1216POP power on password 1217POR plan of record 1218POSIX Portable Operating System Interface [for Unix] 1219POST power on self test 1220POTS plain old telephone system 1221POWER Performance Optimization With Enhanced RISC 1222POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1223PP pair programming 1224PPB PCI [to] PCI bridge 1225PPC PowerPC 1226PPC Power Performance Computing 1227PPI pixels per inch 1228PPM pages per minute 1229PPP Point-to-Point Protocol 1230PPPOA Point-to-Point Protocol over ATM 1231PPPOE Point-to-Point Protocol over Ethernet 1232PPR processor programming reference 1233PPT powerpoint 1234PPT punched paper tape 1235PPU physics processing unit 1236PRAM Parameter RAM 1237PRBS pseudorandom bit sequence 1238PRG pseudorandom generator 1239PRF pseudorandom function [family] 1240PRML partial response, maximum likelihood 1241PRN pseudorandom {noise,number} 1242PRNG pseudorandom number generator 1243PROM programmable read only memory 1244PRP pseudorandom permutation 1245PRU Programmable Realtime Unit 1246PS PostScript 1247PSD power spectral density 1248PSE page size extensions 1249PSK phase shift keying 1250PSK pre-shared key 1251PSTN public switched telephone network 1252PSW program status word 1253PTE page table entry 1254PTLA pseudo top level aggregator 1255PTP page table page 1256PTV perceived target value 1257PU processing unit 1258PUC personal unblocking code 1259PUN physical unit number 1260PV physical volume 1261PVC permanent virtual circuit 1262PVG physical volume group 1263PVI protected-mode virtual interrupt 1264PVRST Per-VLAN rapid spanning tree 1265PVST Per-VLAN Spanning Tree 1266PWM pulse width modulation 1267PXE preboot execution environment 1268QA quality assurance 1269QAM quadrature amplitude modulation 1270QAM quality assurance management 1271QBE query by example 1272QC quality control 1273QDI quasi delay insensitive 1274QCIF quarter common intermediate format 1275QOS quality of service 1276QVL qualified vendor list 1277R/O read only 1278R/W read/write 1279RA receiver address 1280RA remote assistance 1281RA resource affinity 1282RA router advertisement 1283RAD rapid application development 1284RADIUS remote authentication dial-in user service 1285RAID redundant array of {independent,inexpensive} disks 1286RAM random access memory 1287RAS reliability, availability and serviceability 1288RAS remote access service 1289RAS restartable atomic sequence 1290RAS row address strobe 1291RBF radial basis function 1292RBNF routing backus-naur form 1293RBT red-black tree 1294RC release candidate 1295RC remote control 1296RC run commands 1297RCS Revision Control System 1298RCS revision control system 1299RCU read, copy, update 1300RDB Rigid Disk Block 1301RDBMS relational database management system 1302RDF Resource Description Framework 1303RDM relational data model 1304RDMA remote direct memory access 1305RDP remote desktop protocol 1306RDRAM Rambus DRAM 1307RE regular expression 1308REPL read, evaluate, print, loop 1309REST representational state transfer 1310RF radio frequency 1311RFB remote frame buffer 1312RFI radio frequency interference 1313RFO request for ownership 1314RFU reserved for future use 1315RGB red green blue 1316RGBA red green blue alpha 1317RGMII reduced gigabit media independent interface 1318RH read hit 1319RHEL Red Hat Enterprise Linux 1320RHL Red Hat Linux 1321RIB routing information base 1322RIFF Resource Interchange File Format 1323RIP Raster Image Processor 1324RIP Routing Information Protocol 1325RIR regional Internet registry 1326RISC reduced instruction set {computer,computing} 1327RKM ROM Kernel Manual 1328RLE run length encoding 1329RLL run length limited 1330RLO right-to-left override 1331RM read miss 1332RMCP Remote Management Control Protocol 1333RMI remote method invocation 1334RMO Relaxed Memory Ordering 1335RMPM rapid memory power management 1336RMS root mean square 1337RMW read, modify, write 1338RNG random number generator 1339ROM read only memory 1340RPC remote procedure call 1341RPKI resource PKI 1342RPL requested privilege level 1343RPM revolutions per minute 1344RPN reverse Polish notation 1345RPVST Rapid Per-VLAN Spanning Tree 1346RR random replacement 1347RR round robin 1348RS relay station 1349RSA Rivest, Shamir, [and] Adleman 1350RSIP Realm Specific IP 1351RSN Robust Secure Network 1352RSS really simple syndication 1353RSS residual sum of squares 1354RSTP Rapid Spanning Tree Protocol 1355RT real time 1356RTC real time clock 1357RTC real time computing 1358RTF rich text format 1359RTL register transfer language 1360RTL resistor-transistor logic 1361RTL right to left 1362RTOS real time operating system 1363RTS request to send 1364RTT round trip time 1365RUP rational unified process 1366RW Rabin-Williams 1367RWM read-write memory 1368RX {receive,receiver} 1369S/PDIF Sony/Philips Digital Interface Format 1370SA security advisory 1371SA security association 1372SA source address 1373SA structured analysis 1374SAAS software as a service 1375SABRE Semi-automated business research environment 1376SACD super audio compact disc 1377SAD security association database 1378SAF-TE SCSI accessed fault-tolerant enclosure 1379SAGE Semi-automated ground environment 1380SAL {service,system} abstraction layer 1381SAM serial access memory 1382SAM sum addressed memory 1383SAML security assertion markup language 1384SAN storage area network 1385SAP service access point 1386SAPIC streamlined advanced programmable interrupt controller 1387SASD structured analysis, structured design 1388SASI Shugart Associates System Interface 1389SASL simple authentication [and] security layer 1390SATA serial advanced technology attachment 1391SAX simple API for XML 1392SB sound blaster 1393SBSA server base system architecture 1394SBU standard build unit 1395SC store conditional 1396SCA source code analyzer 1397SCADA supervisory control and data acquisition 1398SCC single chip cloud 1399SCC source code control 1400SCCP skinny call control protocol 1401SCCS Source Code Control System 1402SCI scalable coherent interface 1403SCI system control interrupt 1404SCM software configuration management 1405SCM source code management 1406SCM storage-class memory 1407SCO synchronous connection orientated 1408SCP secure copy 1409SCP system control processor 1410SCPI system control and power interface 1411SCSI Small Computer System Interface 1412SCTP Stream Control Transmission Protocol 1413SDDC software defined data center 1414SDEI software delegated exception interface 1415SDI symbol deinterleave 1416SDK software development kit 1417SDL Simple Declarative Language 1418SDL Simple Direct-media Layer 1419SDLC {software,system,systems} development life cycle 1420SDN software defined networking 1421SDP Session Description Protocol 1422SDR software defined radio 1423SDRAM synchronous dynamic random access memory 1424SDS software defined storage 1425SDT syntax-directed translation 1426SEA synchronous external abort 1427SEGV segmentation violation 1428SED self-encrypting drive 1429SED stream editor 1430SEMB serial ATA enclosure management bridge 1431SEO search engine optimization 1432SES SCSI enclosure services 1433SFC sequential function chart 1434SFI simple firmware interface 1435SFI software fault isolation 1436SFTP SSH File Transfer Protocol 1437SFTP Serial File Transfer Protocol 1438SFTP Simple File Transfer Protocol 1439SGI Silicon Graphics, Inc 1440SGI software generated interrupt 1441SGMII serial gigabit media independent interface 1442SGPIO serial general purpose input/output 1443SGRAM synchronous graphics random access memory 1444SHA secure hash algorithm 1445SICP structure and interpretation of computer programs 1446SIDH supersingular isogeny Diffie-Hellman 1447SIEM security information and event management 1448SIF source input format 1449SIFS short inter-frame space 1450SIM subscriber identity module 1451SIMD single instruction, multiple data 1452SIMM single inline memory module 1453SIP Session Initiation Protocol 1454SIR signal-to-interference ratio 1455SIR slow infrared 1456SISD single instruction, single data 1457SLAAC stateless address auto-configuration 1458SLC single-level cell 1459SLDRAM synchronous-link dynamic random access memory 1460SLED single large expensive disk 1461SLI scalable link interface 1462SLI scan-line interleave 1463SLIC system license internal code 1464SLOC source lines of code 1465SLRU segmented LRU 1466SMA smart memory access 1467SMAF system management action field 1468SMAP Simple Mail Access Protocol 1469SMAP supervisor mode access prevention 1470SMART self-monitoring analysis and reporting technology 1471SMB Server Message Block 1472SMB system management bus 1473SMBIOS System Management BIOS 1474SMC system management controller 1475SMD storage module device 1476SMEP supervisor mode execution protection 1477SMF single mode fiber 1478SMI structure of management information 1479SMI system management interrupt 1480SMM system management mode 1481SMP serial management protocol 1482SMP symmetric multiprocessing 1483SMT simultaneous multithreading 1484SMTP Simple Mail Transfer Protocol 1485SMU system management unit 1486SNA systems network architecture 1487SNAP Sub-Network Access Protocol 1488SNIA Storage Networking Industry Association 1489SNMP Simple Network Management Protocol 1490SNR signal-to-noise ratio 1491SOA service oriented architecture 1492SOAP Simple Object Access Protocol 1493SOC system on chip 1494SOF start of frame 1495SOH start of header 1496SOHO small office/home office 1497SOL serial over LAN 1498SOM system on module 1499SP service pack 1500SP stack pointer 1501SPA storage pool allocator 1502SPAN switched port analyzer 1503SPARC scalable processor architecture 1504SPARQL SPARQL Protocol and RDF Query Language 1505SPD security policy database 1506SPD serial presence detect 1507SPDIF Sony/Philips digital interface format 1508SPI serial peripheral interface 1509SPI stateful packet inspection 1510SPL system interrupt priority level 1511SPL spinlock 1512SPMD single process, multiple data 1513SPR special purpose register 1514SPT sectors per track 1515SQA software quality assurance 1516SQCIF sub quarter common intermediate format 1517SQL Structured Query Language 1518SRAM static random access memory 1519SRC sample rate conversion 1520SRP SCSI RDMA protocol 1521SRR shaped round robin 1522SS self-snoop 1523SS stack segment 1524SSA static single assignment 1525SSAP source service access point 1526SSB single-sideband modulation 1527SSC spread spectrum clock 1528SSD solid state drive 1529SSE streaming SIMD extensions 1530SSFDC solid state floppy disc card 1531SSH secure shell 1532SSI server side includes 1533SSID service set identifier 1534SSTP secure socket tunneling protocol 1535SSL secure sockets layer 1536SSP stack smashing protection 1537STC software thermal control 1538STD state transition diagram 1539STM software transactional memory 1540STOMP Streaming Text Oriented Messaging Protocol 1541STP Spanning Tree Protocol 1542STP shielded twisted pair 1543STRG spanning tree root guard 1544SUN Stanford University Network 1545SUS Single Unix Specification 1546SUT system under test 1547SVC switched virtual circuit 1548SVG scalable vector graphics 1549SVGA Super Video Graphics Array 1550SVI {switch,switched} virtual interface 1551SVM secure virtual machine 1552SVM support vector machine 1553SVR System V Release 1554SVS Separate Virtual Space 1555SWF Shockwave Flash 1556SWIG simplified wrapper [and] interface generator 1557SYR symbol timing recovery 1558TA test assertion 1559TA transmitter address 1560TACACS terminal access controller access-control system 1561TAI international atomic time 1562TAO track at once 1563TAOCP The Art of Computer Programming 1564TAP Test Anything Protocol 1565TAS test and set 1566TB terabyte 1567TBNF transitional backus-naur form 1568TCB trace capture buffer 1569TCB trusted computing base 1570TCC thermal control circuit 1571TCL tool command language 1572TCP Transmission Control Protocol 1573TCQ tagged command queueing 1574TDC time [to] digital converter 1575TDD test-driven development 1576TDD time division duplex 1577TDM time division multiplexing 1578TDMA time division multiple access 1579TDOA time difference of arrival 1580TDP thermal design {point,power} 1581TDR time-domain reflectometry 1582TECO Text Editor and Corrector 1583TFT thin film transistor 1584TFTP Trivial File Transfer Protocol 1585TIAS try it and see 1586TIFF tagged image file format 1587TITS try it to see 1588TK temporal key 1589TKIP Temporal Key Integrity Protocol 1590TLA top level aggregator 1591TLB translation lookaside buffer 1592TLD top level domain 1593TLER time-limited error recovery 1594TLI transport layer interface 1595TLS thread local storage 1596TLS transport layer security 1597TM Turing machine 1598TM thermal monitor 1599TMG transmogrifier 1600TMDS transition minimized differential signaling 1601TMO timeout 1602TOD time of day 1603TOS terms of service 1604TOS trusted operating system 1605TOS type of service 1606TP transaction processing 1607TPI tracks per inch 1608TPM transactions per minute 1609TPM trusted platform module 1610TPR task priority register 1611TPS transactions per second 1612TPS transmission parameters signaling 1613TR task register 1614TR token ring 1615TRL timing recovery loop 1616TRNG true random number generator 1617TS terminal services 1618TS time series 1619TS time stamp 1620TS transport stream 1621TSAN Thread Sanitizer 1622TSC time stamp counter 1623TSD time stamp disable 1624TSDB time series database 1625TSL test, set, lock 1626TSO time sharing option 1627TSO Total Store Ordering 1628TSP Time-Stamp Protocol 1629TSP Tunnel Setup Protocol 1630TSP time synchronization protocol 1631TSP traveling salesman problem 1632TSS task state segment 1633TTL time to live 1634TTL transistor-transistor logic 1635TTM translation table maps 1636TTY teletype 1637TUI {terminal,text-based,textual} user interface 1638TX {transmit out,transmitter} 1639TXG transaction group 1640TZ time zone 1641UAC user {access,account} control 1642UAF use-after-free 1643UART universal asynchronous receiver/transmitter 1644UAT user acceptance testing 1645UB undefined behavior 1646UBSAN Undefined Behavior Sanitizer 1647UC uncacheable 1648UCS uniform-cost search 1649UCS unified computing system 1650UCS universal coded character set 1651UDI uniform driver interface 1652UDMA ultra DMA 1653UDO ultra density optical 1654UDP User Datagram Protocol 1655UEFI unified extensible firmware interface 1656UFS Unix File System 1657UGA universal graphics adapter 1658UI unit interval 1659UI user interface 1660UICC universal integrated circuit card 1661UID unique identifier 1662UID user identifier 1663UL upload 1664UMA uniform memory access 1665UMA upper memory area 1666UMB upper memory block 1667UML unified modeling language 1668UMPC ultra-mobile PC 1669UPNP universal plug and play 1670UPS uninterruptible power supply 1671URI uniform resource identifier 1672URL uniform resource locator 1673URN uniform resource name 1674USART universal synchronous/asynchronous receiver/transmitter 1675USB universal serial bus 1676USWC uncacheable speculative write combining 1677UT unit test 1678UTC coordinated universal time 1679UTF unicode transformation formats 1680UTP unshielded twisted pair 1681UTS UNIX time-sharing 1682UUCP Unix-to-Unix Copy Protocol 1683UUID universally unique identifier 1684UUOC useless use of cat 1685UUT unit under test 1686UX user experience 1687VA vertical alignment 1688VA virtual address 1689VA volt-ampere 1690VAX virtual address extension 1691VB Visual Basic 1692VCA variable-gain amplifier 1693VCC common collector voltage 1694VCCP virtual chassis control protocol 1695VCF voltage-controlled filter 1696VCM virtual channel memory 1697VCO voltage-controlled oscillator 1698VCP virtual chassis port 1699VCS version control system 1700VDPAU Video Decode and Presentation API for Unix 1701VES virtual execution system 1702VESA Video Electronics Standards Association 1703VFO variable-frequency oscillator 1704VFS virtual file system 1705VG volume group 1706VGA Video Graphics Array 1707VHDCI very high density cable interconnect 1708VID {VLAN,voltage level} identifier 1709VIM Vi IMproved 1710VIPT virtually indexed, physically tagged 1711VIVT virtually indexed, virtually tagged 1712VLAN virtual local area network 1713VLD variable-length decoding 1714VLIW very long instruction word 1715VLSI very large scale integration 1716VLSM variable length subnet mask 1717VM virtual {machine,memory} 1718VME virtual mode extension 1719VMX vector multimedia extensions 1720VMX virtual machine extensions 1721VNC virtual network computing 1722VOD video on demand 1723VPD vital product data 1724VPN virtual private network 1725VPWS virtual private wire service 1726VR virtual reality 1727VRAM video random access memory 1728VRF virtual routing and forwarding 1729VRM voltage regulator module 1730VROC Virtual RAID On CPU 1731VRRP Virtual Router Redundancy Protocol 1732VSTP VLAN Spanning Tree Protocol 1733VTP VLAN Trunking Protocol 1734VXFS Veritas file sytem 1735VXVM Veritas volume manager 1736W watt 1737W3C World Wide Web Consortium 1738WAFL write anywhere file layout 1739WAMP Web Application Messaging Protocol 1740WAN wide area network 1741WAP Wireless Application Protocol 1742WAP wireless access point 1743WDM Windows Driver Model 1744WDDM Windows Display Driver Model 1745WDT watchdog timer 1746WEP Wired Equivalent Privacy 1747WFI wait for interrupt 1748WFQ weighted fair queuing 1749WH write hit 1750WHEA Windows hardware error architecture 1751WIFI wireless fidelity 1752WLAN wireless local area network 1753WM write miss 1754WMI Windows Management Instrumentation 1755WOL Wake-on-LAN 1756WOM Wake-on-Modem 1757WOR Wake-on-Ring 1758WORM write once read many 1759WP WordPerfect 1760WP word processor 1761WP write protect 1762WPA Wi-Fi Protected Access 1763WPA2 Wi-Fi Protected Access II 1764WPAD web proxy auto-discovery protocol 1765WPS Wi-Fi Protected Setup 1766WRAM window random access memory 1767WS web services 1768WTC write through caching 1769WTD weighted tail drop 1770WWAN wireless wide area network 1771WWW world wide web 1772WYSIAYG what you see is all you get 1773WYSIWYG what you see is what you get 1774XBAR crossbar 1775XDMCP X Display Manager control protocol 1776XER XML encoding rules 1777XGA Extended Graphics Array 1778XHR XMLHttpRequest 1779XIP execute in place 1780XML Extensible Markup Language 1781XNA XNA's not acronymed 1782XNS Xerox network systems 1783XOR exclusive or 1784XP extreme programming 1785XSI X/Open System Interface 1786XSL extensible stylesheet language 1787XSLT extensible stylesheet language transformations 1788XSS cross site scripting 1789XT extended technology 1790XTACACS extended terminal access controller access-control system 1791XTI X/Open transport interface 1792XUL XML user interface language 1793YACC yet another compiler compiler 1794YAML YAML ain't markup language 1795YANG yet another next generation 1796YAWPFAPR you are welcome; please file a problem report 1797YP Yellow Pages 1798YTD year to date 1799ZAP ZFS attribute processor 1800ZBR zone bit recording 1801ZFOD zero-filled on demand 1802ZFS zettabyte file system 1803ZIF zero insertion force 1804ZIFS zero insertion force socket 1805ZIL ZFS intent log 1806ZMA zone multicast address 1807ZOI zero one infinity 1808ZOI zone of influence 1809ZPL ZFS Posix layer 1810ZVOL ZFS Volume 1811