acronyms.comp revision 1.288
1$NetBSD: acronyms.comp,v 1.288 2019/09/02 10:35:15 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 120BA byte align 121BAL basic assembly language 122BAR base address register 123BBS bulletin board system 124BCC blind carbon copy 125BCD binary coded decimal 126BCH boot console handler 127BCR byte count register 128BCS base configuration space 129BD baud 130BDD binary decision diagram 131BDI bit deinterleave 132BDUF big design up front 133BEDO burst extended data output 134BER basic encoding rules 135BER bit error {rate,ratio} 136BERT boot error record table 137BFD bidirectional forwarding detection 138BFD binary {file,format} descriptor 139BFKL big fscking kernel lock 140BFS breadth-first search 141BFT binary file transfer 142BGA ball grid array 143BGP Border Gateway Protocol 144BGPSEC BGP Security 145BIND Berkeley Internet Name Daemon 146BIOS Basic Input/Output System 147BIOS built-in operating system 148BIST built-in self-test 149BIU bus interface unit 150BKDG BIOS and kernel developer's guide 151BLAS basic linear algebra subprograms 152BLC back light control 153BLOB binary large object 154BM bus master 155BMC baseboard management controller 156BMIC bus master interface controller 157BN boundary neutral 158BNF Backus-Naur form 159BO binary output 160BOF beginning of file 161BOM beginning of message 162BOM byte order mark 163BP base pointer 164BP boot processor 165BPB BIOS parameter block 166BPDU bridge protocol data unit 167BPF Berkeley Packet Filter 168BPI bits per inch 169BPM business process modelling 170BPS bits per second 171BPSK binary phase shift keying 172BQS Berkeley quality software 173BRE basic regular expression 174BS backspace 175BS binary sequence 176BSA basic service area 177BSD Berkeley Software Distribution 178BSDP Boot Service Discovery Protocol 179BSF bit scan forward 180BSOD blue screen of death 181BSP binary space partition 182BSP board support package 183BSP bootstrap processor 184BSR bit scan reverse 185BSS basic service set 186BSS block started by symbol 187BSSID basic service set identifier 188BT BitTorrent 189BT Bluetooth 190BT bit test 191BTC bit test [and] complement 192BTM bus transport mechanism 193BTR bit test [and] reset 194BTS bit test [and] set 195BTS bug tracking system 196BW bandwidth 197BWM block-write mode 198BUAG big ugly ASCII graphic 199CA certificate authority 200CACLS change access control lists 201CAD computer-aided design 202CAM computer assisted manufacturing 203CAM conditional access module 204CAM content addressable memory 205CARP Common Address Redundancy Protocol 206CAS column address strobe 207CAS compare and swap 208CAS computer algebra system 209CASE computer aided software engineering 210CAU control access unit 211CAV constant angular velocity 212CBC cipher block chaining 213CBR constant bit rate 214CC carbon copy 215CCD charge coupled device 216CCI co-channel interferer 217CCNUMA cache-coherent non-uniform memory access 218CCTL command completion time limit 219CD cache disable 220CD compact disc 221CDDA compact disc digital audio 222CDL compiler description language 223CDMA code division multiple access 224CDP Cisco Discovery Protocol 225CDRAM cache dynamic random access memory 226CER canonical encoding rules 227CE customer edge 228CF compact flash 229CFB cipher feedback 230CFG context-free grammar 231CFG control-flow graph 232CFI control-flow integrity sanitizer 233CG control gate 234CGA Color Graphics Adapter 235CGI common gateway interface 236CGN Carrier-Grade NAT 237CHAP Challenge-Handshake Authentication Protocol 238CHFS chip file system 239CHS cylinder/head/sector 240CI continuous integration 241CI {common,component} interface 242CIDR Classless Inter-Domain Routing 243CIF common intermediate format 244CIFS Common Internet File System 245CIL common intermediate language 246CIR carrier-to-interference ratio 247CIS contact image sensor 248CISC complex instruction set {computer,computing} 249CJK Chinese, Japanese, [and] Korean 250CLF common log format 251CLI command line interface 252CLI common language infrastructure 253CLR common language runtime 254CLS common language specification 255CLTT closed loop thermal throttling 256CLUT color look-up table 257CLV constant linear velocity 258CM configuration management 259CMA concert multithread architecture 260CMC chassis management controller 261CMC corrected machine check 262CMS {configuration,content,course} management system 263CMI control {management,method} interface 264CMOS complementary metal-oxide-semiconductor 265CMP chip multi-processing 266CMS content management system 267CMYK cyan magenta yellow black 268CN {common,canonical} name 269CNC computer numerical control 270CNR carrier-to-noise ratio 271COA change of authority 272COF current operating frequency 273COFDM coded orthogonal frequency division multiplexing 274COFF common object file format 275COM component object model 276COM computer on module 277COMA cache-only memory architecture 278CORBA common object request broker architecture 279COS class of service 280COW copy-on-write 281CP continuous pilot 282CPB core performance boost 283CPC central processor complex 284CPC cpu performance counters 285CPE common phase error 286CPE common platform enumeration 287CPER common platform error record 288CPG clock pulse generator 289CPI cycles per instruction 290CPL current privilege level 291CPLD complex programmable logic device 292CPP C preprocessor 293CPS characters per second 294CPS continuation-passing style 295CPT command pass through 296CPU central processing unit 297CR carriage return 298CRC cyclic redundancy check 299CRL carrier recovery loop 300CRLF carriage return line feed 301CRT cathode ray tube 302CRUD create, read, update, and delete 303CS cable select 304CS chip select 305CS code segment 306CS computer science 307CSDL {common,conceptual} schema definition language 308CSI channel state information 309CSI common system interface 310CSMA carrier sense multiple access 311CSMA/CA carrier sense multiple access with collision avoidance 312CSMA/CD carrier sense multiple access with collision detection 313CSP communicating sequential processes 314CSP content security policy 315CSP constrain satisfaction problems 316CSP cryptographic service provider 317CSR control [and] status registers 318CSRG Computer Systems Research Group 319CSS cascading style sheets 320CST common spanning tree 321CSV comma-separated values 322CTF compact c type format 323CTM close to metal 324CTR counter [mode] 325CTS clear to send 326CTS common type system 327CUA common user access 328CUT coordinated universal time 329CV control voltage 330CVE common vulnerabilities and exposures 331CVS Concurrent Versions System 332DA destination address 333DAA distributed application architecture 334DAB digital audio broadcasting 335DAC digital [to] analog converter 336DAC discretionary access control 337DAD duplicate address detection 338DANE DNS-based Authentication of Named Entities 339DAO disk at once 340DAP Directory Access Protocol 341DAT digital audio tape 342DAT dynamic acceleration technology 343DB database 344DBA database administrator 345DBA dynamic bandwidth allocation 346DBB data bus buffer 347DBC design by contract 348DBL dynamic buffer limiting 349DBMS database management system 350DBS database server 351DC direct current 352DCC Direct Client-to-Client 353DCC direct cable connect 354DCD data carrier detect 355DCE data control equipment 356DCE distributed computing environment 357DCIM data center infrastructure management 358DCIM digital camera images 359DCL Digital Command Language 360DCOM distributed component object model 361DCOP Desktop COmmunication Protocol 362DCS data collection systems 363DCT discrete cosine transform 364DCU data cache unit 365DDC display data channel 366DDE dynamic data exchange 367DDI device drivers interface 368DDK device driver kit 369DDL data description language 370DDR double data rate 371DDS direct digital sound 372DDWG Digital Display Working Group 373DE debugging extensions 374DE desktop environment 375DEA data encryption algorithm 376DEC Digital Equipment Corporation 377DEK data encryption key 378DEP data execution prevention 379DER distinguished encoding rules 380DES Data Encryption Standard 381DF don't fragment 382DFA deterministic finite automaton 383DFC data flow control 384DFS depth first search 385DFS distributed file system 386DFSAN Data Flow Sanitizer 387DFT diagnostic function test 388DFT discrete Fourier transform 389DGL data generation language 390DH Diffie-Hellman 391DHCP Dynamic Host Configuration Protocol 392DIA dedicated Internet access 393DIFS distributed inter-frame space 394DIMM dual inline memory module 395DIRT design in real time 396DKI driver/kernel interface 397DL diode logic 398DL discrete logarithm 399DL download 400DLCI data link connection identifier 401DLE data link escape 402DLL dynamic link library 403DLP discrete logarithm problem 404DMA direct memory access 405DMI desktop management interface 406DMS document management system 407DMT discrete multitone modulation 408DMU data management layer 409DNARD Digital network appliance reference design 410DND drag and drop 411DNLC directory name lookup cache 412DNS Domain Name System 413DNSSEC DNS Security Extensions 414DOE distributed object environment 415DOF data over fibre 416DOM document object model 417DOS denial of service 418DOS disk operating system 419DP DisplayPort 420DPC deferred procedure call 421DPCM differential pulse code modulation 422DPD dead peer detection 423DPI deep packet inspection 424DPI dots per inch 425DPL descriptor privilege level 426DPS Display PostScript 427DPST display power savings technology 428DRAAS disaster recovery as a service 429DRAM dynamic random access memory 430DRBG deterministic random bit generator 431DRI direct rendering infrastructure 432DRM digital rights management 433DRRS display refresh rate switching 434DS debug store 435DS differentiated services 436DSA digital signature algorithm 437DSAP destination service access point 438DSB double-sideband modulation 439DSCP differentiated services code point 440DSDT differentiated system descriptor table 441DSF device special file 442DSL dataset and snapshot layer 443DSL digital subscriber line 444DSL domain specific language 445DSLAM digital subscriber line access multiplexer 446DSN delivery status notification 447DSO dynamic shared object 448DSP digital signal processor 449DSSS direct sequence spread spectrum 450DTB device tree blob 451DTC device tree compiler 452DTD document type definition 453DTE data terminal equipment 454DTE dumb terminal emulator 455DTL diode-transistor logic 456DTLS datagram transport layer security 457DTS device tree source 458DTS digital thermal sensor 459DUT device under test 460DVB digital video broadcasting 461DVCS distributed version control system 462DVD digital versatile disc 463DVFS dynamic voltage and frequency scaling 464DVI device independent 465DVI Digital Visual Interface 466DVR digital video recorder 467E-XER extended XML encoding rules 468EABI embedded-application binary interface 469EAI Email Address Internationalization 470EAI Enterprise Application Integration 471EAP Extensible Authentication Protocol 472EAPOL EAP over Lan 473EAV entity-attribute-value model 474EAV ethernet audio/video bridging 475EBCDIC Extended Binary Coded Decimal Interchange Code 476EBDA Extended BIOS Data Area 477EBNF extended backus-naur form 478EBR extended boot record 479EC elliptic curve 480ECC elliptic curve cryptography 481ECC error correction code 482ECDH elliptic curve Diffie-Hellman 483ECDL elliptic curve discrete logarithm 484ECDLP elliptic curve discrete logarithm problem 485ECDSA elliptic curve digital signature algorithm 486ECL emitter-coupled logic 487ECN explicit congestion notification 488ECP enhanced capability port 489ECS enhanced chip set 490ECS extended configuration space 491EDAC error detection and correction 492EDAT enhanced dynamic acceleration technology 493EdDSA Edwards curve digital signature algorithm 494EDGE explicit data graph execution 495EDID extended display identification data 496EDO extended data out 497EDS electronical data sheet 498EDSAC electronic delay storage automatic calculator 499EDVAC electronic discrete variable automatic computer 500EEE energy efficient ethernet 501EEPROM electrically erasable programmable read only memory 502EFI extensible firmware interface 503EFL emitter follower logic 504EFM eight to fourteen modulation 505EFS extent file system 506EGA Enhanced Graphics Adapter 507EGP exterior gateway protocol 508EH extension header 509EIDE enhanced IDE 510EISA extended industry standard architecture 511EINJ error injection table 512ELF executable and linking format 513ELS entry level system 514EMI electro-magnetic interference 515EMP electro-magnetic pulse 516EMR electro-magnetic radiation 517EMACS Editor MACroS 518ENIAC electronic numerical integrator and computer 519EOF end of file 520EOI end of interrupt 521EOIS end of interactive support 522EOL end of life 523EOL end of line 524EOT end of transmission 525EPIC explicitly parallel instruction computing 526EPP enhanced parallel port 527EPRML extended partial response, maximum likelihood 528EPROM erasable programmable read only memory 529ERC error recovery control 530ERD emergency recovery disk 531ERD entity relationship diagram 532ERE extended regular expression 533ERST error record serialization table 534ESAN Efficiency Sanitizer 535ESB enterprise service bus 536ESDI enhanced small disk interface 537ESDRAM enhanced synchronous dynamic random access memory 538ESI enclosure services interface 539ESS electronic switching system 540ESS extended service set 541ESSID extended service set identifier 542EST enhanced speedstep 543ETL extract, transform, load 544EU execution unit 545EULA end user license agreement 546FAT file allocation table 547FBRAM frame buffer random access memory 548FCIF full common intermediate format 549FCL fiber channel loop 550FCS frame check sequence 551FDC floppy disk controller 552FDD floppy disk drive 553FDDI fiber distributed data interface 554FDE full disk encryption 555FDT flattened device tree 556FEA finite element analysis 557FEC forward error correction 558FET field-effect transistor 559FF finite field 560FF form feed 561FFDH finite-field Diffie-Hellman 562FFH functional fixed hardware 563FFI foreign function interface 564FFM focus follows mouse 565FFS Fast File System 566FFS find first set 567FFT fast Fourier transform 568FG floating gate 569FHSS frequency hop spread spectrum 570FID frequency identifier 571FIFO first in, first out 572FILO first in, last out 573FIPS Federal Information Processing Standards 574FIR fast infrared 575FLOPS floating [point] operations per second 576FLOSS free/libre/open source software 577FM frequency modulation 578FMR false match rate 579FOSS free/open source software 580FPGA field programmable gate array 581FPM fast page mode 582FPR floating point register 583FPU floating point unit 584FQDN fully qualified domain name 585FRR false rejection rate 586FRU field replaceable unit 587FS file system 588FSB front side bus 589FSCK file system check 590FSF Free Software Foundation 591FSK frequency shift keying 592FSM finite-state machine 593FTA fault tree analysis 594FTL flash translation layer 595FTP File Transfer Protocol 596FTPS File Transfer Protocol Secure 597FUS fast user switching 598FWH firmware hub 599FWS folding white space 600GAL generic array logic 601GARP generic attribute registration protocol 602GAS generic address structure 603GC garbage collector 604GCM Galois counter mode 605GCR group-coded recording 606GDI Graphics Device Interface 607GDT global descriptor table 608GECOS general comprehensive operating supervisor 609GEM graphics environment manager 610GEM graphics execution manager 611GENA general event notification architecture 612GHC Glasgow Haskell compiler 613GHES generic hardware error source 614GIC generic interrupt controller 615GID group identifier 616GIF graphics interchange format 617GMCH graphics and memory controller hub 618GNU GNU's Not Unix 619GOP graphics output protocol 620GOT global offset table 621GPE general purpose event 622GPF general protection fault 623GPG GNU Privacy Guard 624GPL [GNU] General Public License 625GPR general purpose register 626GPS generalized processor sharing 627GPT GUID partition table 628GPU graphics processing unit 629GR golden ratio 630GRE generic routing encapsulation 631GSI global system interrupt 632GUI graphical user interface 633GUID globally unique identifier 634GVFS git virtual file system 635HA high availability 636HAL hardware abstraction layer 637HAT hashed array tree 638HATEOAS hypermedia as the engine of application state 639HBA host bus adapter 640HCF halt and catch fire 641HCI host controller interface 642HCI human-computer interaction 643HCL hardware compatibility list 644HDCP High-bandwidth Digital Content Protection 645HDD hard disk drive 646HDL hardware description language 647HDMI High-Definition Multimedia Interface 648HDTV high-definition television 649HECI host embedded controller interface 650HEST hardware error source table 651HEVC high efficiency video coding 652HF high frequency 653HFM highest frequency mode 654HFS hierarchical file system 655HID human interface device 656HKP HTTP Keyserver Protocol 657HLL high-level language 658HMA high memory area 659HMI human-machine interface 660HOOD hierarchical object oriented design 661HP Hewlett-Packard 662HPC high performance computing 663HPET high precision event timer 664HSM hardware security module 665HSM hierarchical storage management 666HT hyper-threading 667HTC hardware thermal control 668HTCC high temperature co-fired ceramic 669HTML HyperText Markup Language 670HTT hyper-threading technology 671HTTP Hypertext Transfer Protocol 672HTTPS Hypertext Transfer Protocol Secure 673HVM hardware virtual machine 674HVDS High-Voltage Differential Signaling 675HWASAN Hardware-assisted Address Sanitizer 676HZ Hertz 677I2O intelligent input/output 678IA information assurance 679IAAS infrastructure as a service 680IANA Internet Assigned Numbers Authority 681IBC iterated block cipher 682IBM International Business Machines 683IBPI international blinking pattern interpretation 684IBS instruction based sampling 685IBSS independent basic service set 686IC integrated circuit 687ICA independent computer architecture 688ICACLS integrity control access control lists 689ICB Internet Citizen's Band 690ICE in-circuit emulator 691ICE internal compiler error 692ICH I/O controller hub 693ICMP Internet Control Message Protocol 694ICT information and communications technology 695ICW initialization command word 696IDA Intel dynamic acceleration 697IDCMP Intuition direct communication message port 698IDCT inverse discrete cosine transform 699IDE integrated development environment 700IDE integrated drive electronics 701IDPS intrusion detection [and] prevention system 702IDRP inter-domain routing protocol 703IDS intrusion detection system 704IDT interrupt descriptor table 705IE Internet Explorer 706IEC International Electrotechnical Commission 707IEEE Institute of Electrical and Electronics Engineers 708IESG Internet Engineering Steering Group 709IETF Internet Engineering Task Force 710IF intermediate frequency 711IFCM isochronous flow control mode 712IFF Interchange File Format 713IFS internal field separator 714IGD Internet gateway device 715IGMP Internet Group Management Protocol 716IGP interior gateway protocol 717IHV independent hardware vendor 718IKE Internet key exchange 719ILM internal loopback mode 720ILOM integrated lights-out management 721ILP instruction level parallelism 722IM instant messaging 723IMAP Internet Message Access Protocol 724IMC integrated memory controller 725IMCR interrupt mode configuration register 726IMR interrupt mask register 727IMS information management system 728IMSI international mobile subscriber identity 729INCITS InterNational Committee for Information Technology Standards 730IO input/output 731IOCTL input/output control 732IOM input/output managers 733IOMMU input/output memory management unit 734IOT Internet of Things 735IP Internet Protocol 736IP intellectual property 737IPC instructions per cycle 738IPC interprocess communication 739IPCF interprocess communication facility 740IPE integrated programming environment 741IPI intelligent peripheral interface 742IPI interprocessor interrupt 743IPL Initial Program Load 744IPL Interrupt Priority Level 745IPMB Intelligent Platform Management Bus 746IPMI Intelligent Platform Management Interface 747IPNG Internet Protocol, Next Generation 748IPS in-plane switching 749IPS intrusion prevention system 750IPSEC Internet Protocol Security 751IRC Internet Relay Chat 752IRDA infrared data association 753IRDP ICMP Router Discovery Protocol 754IRQ interrupt request 755IRQL interrupt request level 756IRR interrupt request register 757IRTF Internet Research Task Force 758IS information system 759ISA industry standard architecture 760ISA instruction set architecture 761ISE instant secure erase 762ISDN integrated services digital network 763ISI inter-symbol interference 764ISL initial system load 765ISM industrial, scientific, [and] medical 766ISN initial serial number 767ISO International Standards Organization 768ISOC Internet Society 769ISP Internet service provider 770ISR in-service register 771ISR interrupt service routine 772IST internal spanning tree 773IST interrupt stack table 774ISV independent software vendor 775IT information technology 776ITB Intel Turbo Boost 777ITIL information technology infrastructure library 778ITP in-target probe 779ITSM IT service management 780IV initialization vector 781IVT interrupt vector table 782JBOD just a bunch of disks 783JCL Job Control Language 784JFET junction [gate] field-effect transistor 785JIT just in time 786JPEG Joint Photographic Experts Group 787JRE Java Runtime Environment 788JSON JavaScript Object Notation 789JTAG joint test action group 790KASLR kernel address space layout randomization 791KB keyboard 792KB kilobyte 793KBD keyboard 794KBD kilobaud 795KCS keyboard controller style 796KLOC thousand lines of code 797KMS kernel-mode setting 798KPI kernel programming interface 799KVA kernel virtual address 800KVM kernel virtual machine 801KVM kernel virtual memory 802KVM keyboard, video, [and] mouse 803L2CAP link layer control and adaptation protocol 804LAMP Linux Apache MySQL {Perl,PHP,Python} 805LAN local area network 806LAPIC local advanced programmable interrupt controller 807LAR load access rights 808LBA logical block addressing 809LBNF labeled backus-naur form 810LBS location-based service 811LCD liquid crystal display 812LCP link control protocol 813LDA local delivery agent 814LDAP Lightweight Directory Access Protocol 815LDR light-dependent resistor 816LDT local descriptor table 817LE logical extent 818LED light emitting diode 819LELL low energy link layer 820LER label edge router 821LF line feed 822LF low frequency 823LFM lowest frequency mode 824LFN long file names 825LFO low-frequency oscillation 826LFS log-structured file system 827LFU least frequently used 828LHP loop heat pipe 829LIF logical interchange format 830LIFO last in, first out 831LILO LInux LOader 832LILO last in, last out 833LINT local interrupt 834LIR local Internet registry 835LISP LISt Processor 836LISP Locator/ID Separation Protocol 837LKM {Linux,loadable} kernel module 838LKML Linux kernel mailing list 839LL load linked 840LL/SC load linked/store conditional 841LLC logical link control 842LLD low-level design 843LLDD low-level design document 844LLDP link layer discovery protocol 845LLF low level format 846LLMNR link-local multicast name resolution 847LLVM Low Level Virtual Machine 848LM long mode 849LMCE local machine check exception 850LMI local management interface 851LMM link management mode 852LMP link management protocol 853LNO loop nest optimization 854LOC lines of code 855LOM lights-out management 856LPE Linux performance events 857LPC low pin count 858LPS local positioning system 859LRC longitudinal redundancy check 860LRM left-to-right mark 861LRO left-to-right override 862LRU least recently used 863LS link state 864LSAN Leak Sanitizer 865LSB Linux standards base 866LSB least significant {bit,byte} 867LSI large scale integration 868LSL load segment limit 869LSM log structured merge 870LSN Large Scale NAT 871LSN log sequence number 872LSR label switch router 873LTCC low temperature co-fired ceramic 874LTO linear tape-open 875LTO link time optimization 876LTR left to right 877LTR load task register 878LTR letter(-sized paper) 879LTS long term support 880LUA Lua Uppercase Accident 881LUN logical unit number 882LV logical volume 883LVM logical volume management 884LVT local vector table 885LVDS Low-Voltage Differential Signaling 886LWP light-weight process 887LZSS Lempel Ziv Storer Szymanski 888LZW Lempel Ziv Welch 889MAB MAC authentication bypass 890MAC mandatory access control 891MAC {media,medium} access control 892MAC message authentication {check,code} 893MADT multiple APIC descriptor table 894MAMR microwave-assisted magnetic recording 895MB megabyte 896MBA multi-boot agent 897MBR master boot record 898MBS megabits per second 899MC memory controller 900MCA machine check architecture 901MCA MicroChannel architecture 902MCC multiversion concurrency control 903MCE machine check exception 904MCGA Multi-Color Graphics Array 905MCH memory controller hub 906MCLAG multi-chassis link aggregation 907MCM multi-chip module 908MCQ memory controlled queue 909MD machine-dependent 910MD-SAL model-driven service abstraction layer 911MDA mail delivery agent 912MDA Monochrome Display Adapter 913MDC Management Data Clock 914MDI Medium Dependent Interface 915MDI-X Medium Dependent Interface Crossover 916MDIO Management Data Input/Output 917MDMX MIPS Digital Media eXtension 918MDRAM multibank dynamic random access memory 919MESI modified, exclusive, shared, invalid 920MFC merge from current 921MFC Microsoft Foundation Classes 922MFM modified frequency modulation 923MFU most frequently used 924MGCP media gateway control protocol 925MHU message handling unit 926MI machine-independent 927MI machine interface 928MIB management information base 929MIC message integrity {check,code} 930MID mobile Internet device 931MIDI musical instrument digital interface 932MIF management information format 933MII media independent interface 934MIM man in the middle 935MIMD multiple instruction, multiple data 936MIME Multipurpose Internet Mail Extensions 937MIMO multiple input multiple output 938MIPS million instructions per second 939MIPS Microprocessor without Interlocked Pipeline Stages 940MISD multiple instruction, single data 941MIT Massachusetts Institute of Technology 942MITM man in the middle 943ML machine language 944ML machine learning 945ML mailing list 946ML markup language 947ML maximum likelihood 948MLC multi-level cell 949MLD multicast listener discovery 950MLHP micro loop heat pipe 951MMF multi-mode fiber 952MMIC monolithic microwave integrated circuit 953MMIO memory mapped input/output 954MMORPG massive multiplayer online role playing game 955MMRP multiple MAC registration protocol 956MMU memory management unit 957MMX matrix math extension 958MMX multimedia extension 959MMX multiple math extension 960MO magneto-optical 961MOESI modified, owned, exclusive, shared, invalid 962MOF maximum operating frequency 963MOSFET metal-oxide-semiconductor field-effect transistor 964MOSI modified, owned, shared, invalid 965MP multi-platform 966MP multiplayer 967MP {multiprocessing,multiprocessor} 968MPEG moving picture experts group 969MPI message passing interface 970MPLS Multiprotocol Label Switching 971MPP massively parallel processor 972MPS memory pool system 973MPS multiprocessor specification 974MQTT Message Queuing Telemetry Transport 975MR modem ready 976MRO method resolution order 977MRP multiple registration protocol 978MRU most recently used 979MS Microsoft 980MSAN Memory Sanitizer 981MSB most significant {bit,byte} 982MSC message sequence chart 983MSE mean square error 984MSF minutes seconds frames 985MSI message signaled interrupt 986MSI modified, shared, invalid 987MSR {machine state,model-specific} register 988MSS maximum segment size 989MSTP Multiple Spanning Tree Protocol 990MT machine translation 991MTA mail transfer agent 992MTBF mean time between failures 993MTP media transfer protocol 994MTRR memory type range register 995MTTF mean time to failure 996MTU maximum transmission unit 997MUA mail user agent 998MUD multi-user domain 999MVCC multiversion concurrency control 1000MVR multicast VLAN registration 1001MVRP multiple VLAN registration protocol 1002MWE module width encoding 1003MX mail exchange 1004NACK negative acknowledgement 1005NAK negative acknowledgement 1006NAN not a number 1007NAPT Network Address Port Translation 1008NAS network attached storage 1009NAT network address translation 1010NAV network allocation vector 1011NC numerical control 1012NC-SI network controller sideband interface 1013NCO numerically-controlled oscillator 1014NCP Network Control Protocol 1015NCSI network connectivity status indicator 1016NCQ native command queuing 1017ND neighbor discovery 1018NDFA nondeterministic finite automaton 1019NDIS network driver interface specification 1020NE numeric error 1021NEWS Network extensible Window System 1022NFA nondeterministic finite automaton 1023NFC near-field communication 1024NFCI no functional change intended 1025NFS network file system 1026NFV network function virtualization 1027NIA next instruction address 1028NIC network information center 1029NIC network interface card 1030NIDS network intrusion detection system 1031NIP network interface protocol 1032NIPS network intrusion prevention system 1033NIS network information service 1034NIST National Institute of Standards and Technology 1035NLS native language support 1036NMI non-maskable interrupt 1037NNTP Network News Transfer Protocol 1038NOC network operations center 1039NOP no operation 1040NOS network operating system 1041NP nondeterministic polynomial time 1042NRND not recommended for new designs 1043NRZ non-return to zero 1044NSA nation-state adversary 1045NSA no such agency 1046NSA National Security Agency 1047NTM non-deterministic Turing machine 1048NTP Network Time Protocol 1049NUMA non-uniform memory access 1050NURBS non-uniform rational basis spline 1051NVMM NetBSD Virtual Machine Monitor 1052NVMM non-volatile main memory 1053NVRAM non-volatile random access memory 1054NW not write-through 1055NX no execute 1056OAEP optimal asymmetric encryption padding 1057OAM operations, administration, and {management,maintenance} 1058OBO off by one 1059OBOE off by one error 1060OCL object constraint language 1061OCR optical character recognition 1062ODE offline device environment 1063ODI open data-link interface 1064ODM object data manager 1065ODCM on-demand clock modulation 1066ODT on-die termination 1067OEM original equipment manufacturer 1068OFB output feedback 1069OFDM orthogonal frequency division multiplexing 1070OFET organic field-effect transistor 1071OLAP online analytical processing 1072OLE object linking and embedding 1073OLTP online transaction processing 1074ONFI open nand flash interface 1075OO OpenOffice 1076OO object oriented 1077OOB out of band 1078OOE out of order execution 1079OOM out of memory 1080OOO OpenOffice.org 1081OOP object oriented programming 1082OOPS object oriented programming systems 1083OOSE object oriented software engineering 1084OPM operations per minute 1085OPS operations per second 1086OQL Object Query Language 1087ORB object request broker 1088ORM object-relational mapping 1089OS operating system 1090OSD open source definition 1091OSF open software foundation 1092OSI Open Source Initiative 1093OSI open systems interconnection 1094OSPF open shortest path first 1095OSPM OS power management 1096OSS open sound system 1097OSS open source software 1098OSVW operating system visible workarounds 1099OTP one time password 1100OTP open telecom platform 1101OU organizational unit 1102OUI organizationally unique identifier 1103OWL Web Ontology Language 1104P2P PCI to PCI 1105P2P peer to peer 1106PA phase accumulator 1107PA physical address 1108PAAS platform as a service 1109PAC phase-amplitude converter 1110PAE physical address extension 1111PAGP port aggregation protocol 1112PAL phase alternating line 1113PAL programmable array logic 1114PAM pluggable authentication modules 1115PAM pulse amplitude modulation 1116PAP password authentication protocol 1117PAT page attribute table 1118PAT port address translation 1119PATA parallel ATA 1120PAX portable archive exchange 1121PBE pending break encoding 1122PBE programming by example 1123PC personal computer 1124PC program counter 1125PCB printed circuit board 1126PCB process control block 1127PCB Protocol Control Block 1128PCC Portable C Compiler 1129PCD page-level cache disable 1130PCE path computation element 1131PCE performance-monitor counter enable 1132PCEP Path Computation Element Protocol 1133PCH platform controller hub 1134PCI peripheral component interconnect 1135PCM phase change memory 1136PCM pulse code modulation 1137PCMCIA Personal Computer Memory Card International Association 1138PCP Port Control Protocol 1139PD public domain 1140PDA personal digital assistant 1141PDA pushdown automaton 1142PDAG propositional directed acyclic graph 1143PDB power distribution board 1144PDF portable document format 1145PDM pulse-duration modulation 1146PDN pull-down network 1147PDP page {descriptor,directory} page 1148PDS product data sheet 1149PDU protocol data unit 1150PE protection enable 1151PE provider edge 1152PEAP Protected EAP 1153PECI platform environment control interface 1154PEP protocol extension protocol 1155PER packed encoding rules 1156PFS perfect forward secrecy 1157PGAS partitioned global address space 1158PGE page global enable 1159PGP Pretty Good Privacy 1160PHB PCI host bridge 1161PHP PHP: Hypertext Preprocessor 1162PIC performance instrumentation counters 1163PIC position independent code 1164PIC programmable interrupt controller 1165PICNIC problem in chair, not in computer 1166PID process id 1167PIE position independent executable 1168PIL Priority Interrupt Level 1169PIM personal information manager 1170PIM platform-independent model 1171PIO programmed input/output 1172PIPT physically indexed, physically tagged 1173PIQ prefetch input queue 1174PIT programmable interrupt timer 1175PIV personal identity verification 1176PIX Private Internet eXchange 1177PKCS public-key cryptography standards 1178PKI public key infrastructure 1179PLC programmable logic controller 1180PLD programmable logic device 1181PLL phase locked loop 1182PLRU pseudo LRU 1183PLTM package level thermal management 1184PM power management 1185PM {phase,pulse} modulation 1186PMC performance monitoring counters 1187PME power management event 1188PMEG page map entry group 1189PMI performance monitoring infrastructure 1190PMI platform management interrupt 1191PMIC power management integrated circut 1192PMIO port-mapped input/output 1193PMT photo-multiplier tube 1194PMU performance monitoring units 1195PMU power management unit 1196PNG portable network graphics 1197PNP plug and play 1198POE power over ethernet 1199POF probability of failure 1200POP Post Office Protocol 1201POP power on password 1202POR plan of record 1203POSIX Portable Operating System Interface [for Unix] 1204POST power on self test 1205POTS plain old telephone system 1206POWER Performance Optimization With Enhanced RISC 1207POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1208PP pair programming 1209PPB PCI [to] PCI bridge 1210PPC PowerPC 1211PPC Power Performance Computing 1212PPI pixels per inch 1213PPM pages per minute 1214PPP Point-to-Point Protocol 1215PPPOA Point-to-Point Protocol over ATM 1216PPPOE Point-to-Point Protocol over Ethernet 1217PPR processor programming reference 1218PPT powerpoint 1219PPT punched paper tape 1220PPU physics processing unit 1221PRAM Parameter RAM 1222PRBS pseudorandom bit sequence 1223PRG pseudorandom generator 1224PRF pseudorandom function [family] 1225PRML partial response, maximum likelihood 1226PRN pseudorandom {noise,number} 1227PRNG pseudorandom number generator 1228PROM programmable read only memory 1229PRP pseudorandom permutation 1230PRU Programmable Realtime Unit 1231PS PostScript 1232PSD power spectral density 1233PSE page size extensions 1234PSK phase shift keying 1235PSK pre-shared key 1236PSTN public switched telephone network 1237PSW program status word 1238PTE page table entry 1239PTLA pseudo top level aggregator 1240PTP page table page 1241PTV perceived target value 1242PU processing unit 1243PUC personal unblocking code 1244PUN physical unit number 1245PV physical volume 1246PVC permanent virtual circuit 1247PVG physical volume group 1248PVI protected-mode virtual interrupt 1249PVRST Per-VLAN rapid spanning tree 1250PVST Per-VLAN Spanning Tree 1251PWM pulse width modulation 1252PXE preboot execution environment 1253QA quality assurance 1254QAM quadrature amplitude modulation 1255QAM quality assurance management 1256QBE query by example 1257QC quality control 1258QDI quasi delay insensitive 1259QCIF quarter common intermediate format 1260QOS quality of service 1261QVL qualified vendor list 1262R/O read only 1263R/W read/write 1264RA receiver address 1265RA remote assistance 1266RA resource affinity 1267RA router advertisement 1268RAD rapid application development 1269RADIUS remote authentication dial-in user service 1270RAID redundant array of {independent,inexpensive} disks 1271RAM random access memory 1272RAS reliability, availability and serviceability 1273RAS remote access service 1274RAS restartable atomic sequence 1275RAS row address strobe 1276RBF radial basis function 1277RBNF routing backus-naur form 1278RBT red-black tree 1279RC release candidate 1280RC remote control 1281RC run commands 1282RCS Revision Control System 1283RCS revision control system 1284RCU read, copy, update 1285RDB Rigid Disk Block 1286RDBMS relational database management system 1287RDF Resource Description Framework 1288RDM relational data model 1289RDMA remote direct memory access 1290RDP remote desktop protocol 1291RDRAM Rambus DRAM 1292RE regular expression 1293REPL read, evaluate, print, loop 1294REST representational state transfer 1295RF radio frequency 1296RFB remote frame buffer 1297RFI radio frequency interference 1298RFO request for ownership 1299RFU reserved for future use 1300RGB red green blue 1301RGBA red green blue alpha 1302RGMII reduced gigabit media independent interface 1303RH read hit 1304RHEL Red Hat Enterprise Linux 1305RHL Red Hat Linux 1306RIB routing information base 1307RIFF Resource Interchange File Format 1308RIP Raster Image Processor 1309RIP Routing Information Protocol 1310RIR regional Internet registry 1311RISC reduced instruction set {computer,computing} 1312RKM ROM Kernel Manual 1313RLE run length encoding 1314RLL run length limited 1315RLO right-to-left override 1316RM read miss 1317RMCP Remote Management Control Protocol 1318RMI remote method invocation 1319RMO Relaxed Memory Ordering 1320RMPM rapid memory power management 1321RMS root mean square 1322RMW read, modify, write 1323RNG random number generator 1324ROM read only memory 1325RPC remote procedure call 1326RPKI resource PKI 1327RPL requested privilege level 1328RPM revolutions per minute 1329RPN reverse Polish notation 1330RPVST Rapid Per-VLAN Spanning Tree 1331RR random replacement 1332RR round robin 1333RS relay station 1334RSA Rivest, Shamir, [and] Adleman 1335RSIP Realm Specific IP 1336RSN Robust Secure Network 1337RSS really simple syndication 1338RSS residual sum of squares 1339RSTP Rapid Spanning Tree Protocol 1340RT real time 1341RTC real time clock 1342RTC real time computing 1343RTF rich text format 1344RTL register transfer language 1345RTL resistor-transistor logic 1346RTL right to left 1347RTOS real time operating system 1348RTS request to send 1349RTT round trip time 1350RUP rational unified process 1351RW Rabin-Williams 1352RWM read-write memory 1353RX {receive,receiver} 1354S/PDIF Sony/Philips Digital Interface Format 1355SA security advisory 1356SA security association 1357SA source address 1358SA structured analysis 1359SAAS software as a service 1360SABRE Semi-automated business research environment 1361SACD super audio compact disc 1362SAD security association database 1363SAF-TE SCSI accessed fault-tolerant enclosure 1364SAGE Semi-automated ground environment 1365SAL {service,system} abstraction layer 1366SAM serial access memory 1367SAM sum addressed memory 1368SAML security assertion markup language 1369SAN storage area network 1370SAP service access point 1371SAPIC streamlined advanced programmable interrupt controller 1372SASD structured analysis, structured design 1373SASI Shugart Associates System Interface 1374SASL simple authentication [and] security layer 1375SATA serial advanced technology attachment 1376SAX simple API for XML 1377SB sound blaster 1378SBSA server base system architecture 1379SBU standard build unit 1380SC store conditional 1381SCA source code analyzer 1382SCADA supervisory control and data acquisition 1383SCC single chip cloud 1384SCC source code control 1385SCCP skinny call control protocol 1386SCCS Source Code Control System 1387SCI scalable coherent interface 1388SCI system control interrupt 1389SCM software configuration management 1390SCM source code management 1391SCM storage-class memory 1392SCO synchronous connection orientated 1393SCP secure copy 1394SCP system control processor 1395SCPI system control and power interface 1396SCSI Small Computer System Interface 1397SCTP Stream Control Transmission Protocol 1398SDDC software defined data center 1399SDEI software delegated exception interface 1400SDI symbol deinterleave 1401SDK software development kit 1402SDL Simple Declarative Language 1403SDL Simple Direct-media Layer 1404SDLC {software,system,systems} development life cycle 1405SDN software defined networking 1406SDP Session Description Protocol 1407SDRAM synchronous dynamic random access memory 1408SDS software defined storage 1409SDT syntax-directed translation 1410SEA synchronous external abort 1411SEGV segmentation violation 1412SED self-encrypting drive 1413SED stream editor 1414SEMB serial ATA enclosure management bridge 1415SEO search engine optimization 1416SES SCSI enclosure services 1417SFC sequential function chart 1418SFI simple firmware interface 1419SFI software fault isolation 1420SFTP SSH File Transfer Protocol 1421SFTP Serial File Transfer Protocol 1422SFTP Simple File Transfer Protocol 1423SGI Silicon Graphics, Inc 1424SGI software generated interrupt 1425SGMII serial gigabit media independent interface 1426SGPIO serial general purpose input/output 1427SGRAM synchronous graphics random access memory 1428SHA secure hash algorithm 1429SICP structure and interpretation of computer programs 1430SIDH supersingular isogeny Diffie-Hellman 1431SIEM security information and event management 1432SIF source input format 1433SIFS short inter-frame space 1434SIM subscriber identity module 1435SIMD single instruction, multiple data 1436SIMM single inline memory module 1437SIP Session Initiation Protocol 1438SIR signal-to-interference ratio 1439SIR slow infrared 1440SISD single instruction, single data 1441SLAAC stateless address auto-configuration 1442SLC single-level cell 1443SLDRAM synchronous-link dynamic random access memory 1444SLED single large expensive disk 1445SLI scalable link interface 1446SLI scan-line interleave 1447SLIC system license internal code 1448SLOC source lines of code 1449SLRU segmented LRU 1450SMA smart memory access 1451SMAF system management action field 1452SMAP Simple Mail Access Protocol 1453SMAP supervisor mode access prevention 1454SMART self-monitoring analysis and reporting technology 1455SMB Server Message Block 1456SMB system management bus 1457SMBIOS System Management BIOS 1458SMC system management controller 1459SMD storage module device 1460SMEP supervisor mode execution protection 1461SMF single mode fiber 1462SMI structure of management information 1463SMI system management interrupt 1464SMM system management mode 1465SMP serial management protocol 1466SMP symmetric multiprocessing 1467SMT simultaneous multithreading 1468SMTP Simple Mail Transfer Protocol 1469SMU system management unit 1470SNA systems network architecture 1471SNAP Sub-Network Access Protocol 1472SNIA Storage Networking Industry Association 1473SNMP Simple Network Management Protocol 1474SNR signal-to-noise ratio 1475SOA service oriented architecture 1476SOAP Simple Object Access Protocol 1477SOC system on chip 1478SOF start of frame 1479SOH start of header 1480SOHO small office/home office 1481SOL serial over LAN 1482SOM system on module 1483SP service pack 1484SP stack pointer 1485SPA storage pool allocator 1486SPAN switched port analyzer 1487SPARC scalable processor architecture 1488SPARQL SPARQL Protocol and RDF Query Language 1489SPD security policy database 1490SPD serial presence detect 1491SPDIF Sony/Philips digital interface format 1492SPI serial peripheral interface 1493SPI stateful packet inspection 1494SPL system interrupt priority level 1495SPL spinlock 1496SPMD single process, multiple data 1497SPR special purpose register 1498SPT sectors per track 1499SQA software quality assurance 1500SQCIF sub quarter common intermediate format 1501SQL Structured Query Language 1502SRAM static random access memory 1503SRC sample rate conversion 1504SRP SCSI RDMA protocol 1505SRR shaped round robin 1506SS self-snoop 1507SS stack segment 1508SSA static single assignment 1509SSAP source service access point 1510SSB single-sideband modulation 1511SSC spread spectrum clock 1512SSD solid state drive 1513SSE streaming SIMD extensions 1514SSFDC solid state floppy disc card 1515SSH secure shell 1516SSI server side includes 1517SSID service set identifier 1518SSL secure sockets layer 1519SSP stack smashing protection 1520STC software thermal control 1521STD state transition diagram 1522STOMP Streaming Text Oriented Messaging Protocol 1523STP Spanning Tree Protocol 1524STP shielded twisted pair 1525STRG spanning tree root guard 1526SUN Stanford University Network 1527SUS Single Unix Specification 1528SUT system under test 1529SVC switched virtual circuit 1530SVG scalable vector graphics 1531SVGA Super Video Graphics Array 1532SVI {switch,switched} virtual interface 1533SVM secure virtual machine 1534SVM support vector machine 1535SVR System V Release 1536SVS Separate Virtual Space 1537SWF Shockwave Flash 1538SWIG simplified wrapper [and] interface generator 1539SYR symbol timing recovery 1540TA test assertion 1541TA transmitter address 1542TACACS terminal access controller access-control system 1543TAI international atomic time 1544TAO track at once 1545TAOCP The Art of Computer Programming 1546TAP Test Anything Protocol 1547TAS test and set 1548TB terabyte 1549TBNF transitional backus-naur form 1550TCB trace capture buffer 1551TCB trusted computing base 1552TCC thermal control circuit 1553TCL tool command language 1554TCP Transmission Control Protocol 1555TCQ tagged command queueing 1556TDC time [to] digital converter 1557TDD test-driven development 1558TDD time division duplex 1559TDM time division multiplexing 1560TDMA time division multiple access 1561TDOA time difference of arrival 1562TDP thermal design {point,power} 1563TDR time-domain reflectometry 1564TECO Text Editor and Corrector 1565TFT thin film transistor 1566TFTP Trivial File Transfer Protocol 1567TIAS try it and see 1568TIFF tagged image file format 1569TITS try it to see 1570TK temporal key 1571TKIP Temporal Key Integrity Protocol 1572TLA top level aggregator 1573TLB translation lookaside buffer 1574TLD top level domain 1575TLER time-limited error recovery 1576TLI transport layer interface 1577TLS thread local storage 1578TLS transport layer security 1579TM Turing machine 1580TM thermal monitor 1581TMG transmogrifier 1582TMDS transition minimized differential signaling 1583TMO timeout 1584TOD time of day 1585TOS terms of service 1586TOS trusted operating system 1587TOS type of service 1588TP transaction processing 1589TPI tracks per inch 1590TPM transactions per minute 1591TPM trusted platform module 1592TPR task priority register 1593TPS transactions per second 1594TPS transmission parameters signaling 1595TR task register 1596TR token ring 1597TRL timing recovery loop 1598TRNG true random number generator 1599TS terminal services 1600TS time series 1601TS time stamp 1602TS transport stream 1603TSAN Thread Sanitizer 1604TSC time stamp counter 1605TSD time stamp disable 1606TSDB time series database 1607TSL test, set, lock 1608TSO time sharing option 1609TSO Total Store Ordering 1610TSP Time-Stamp Protocol 1611TSP Tunnel Setup Protocol 1612TSP time synchronization protocol 1613TSP traveling salesman problem 1614TSS task state segment 1615TTL time to live 1616TTL transistor-transistor logic 1617TTM translation table maps 1618TTY teletype 1619TUI {terminal,text-based,textual} user interface 1620TX {transmit out,transmitter} 1621TXG transaction group 1622TZ time zone 1623UAC user {access,account} control 1624UAF use-after-free 1625UART universal asynchronous receiver/transmitter 1626UAT user acceptance testing 1627UB undefined behavior 1628UBSAN Undefined Behavior Sanitizer 1629UC uncacheable 1630UCS uniform-cost search 1631UCS unified computing system 1632UCS universal coded character set 1633UDI uniform driver interface 1634UDMA ultra DMA 1635UDO ultra density optical 1636UDP User Datagram Protocol 1637UEFI unified extensible firmware interface 1638UFS Unix File System 1639UGA universal graphics adapter 1640UI unit interval 1641UI user interface 1642UICC universal integrated circuit card 1643UID unique identifier 1644UID user identifier 1645UL upload 1646UMA uniform memory access 1647UMA upper memory area 1648UMB upper memory block 1649UML unified modeling language 1650UMPC ultra-mobile PC 1651UPNP universal plug and play 1652UPS uninterruptible power supply 1653URI uniform resource identifier 1654URL uniform resource locator 1655URN uniform resource name 1656USART universal synchronous/asynchronous receiver/transmitter 1657USB universal serial bus 1658USWC uncacheable speculative write combining 1659UT unit test 1660UTC coordinated universal time 1661UTF unicode transformation formats 1662UTP unshielded twisted pair 1663UUCP Unix-to-Unix Copy Protocol 1664UUID universally unique identifier 1665UUOC useless use of cat 1666UUT unit under test 1667UX user experience 1668VA vertical alignment 1669VA virtual address 1670VA volt-ampere 1671VAX virtual address extension 1672VB Visual Basic 1673VCA variable-gain amplifier 1674VCC common collector voltage 1675VCCP virtual chassis control protocol 1676VCF voltage-controlled filter 1677VCM virtual channel memory 1678VCO voltage-controlled oscillator 1679VCP virtual chassis port 1680VCS version control system 1681VDPAU Video Decode and Presentation API for Unix 1682VES virtual execution system 1683VESA Video Electronics Standards Association 1684VFO variable-frequency oscillator 1685VFS virtual file system 1686VG volume group 1687VGA Video Graphics Array 1688VHDCI very high density cable interconnect 1689VID {VLAN,voltage level} identifier 1690VIM Vi IMproved 1691VIPT virtually indexed, physically tagged 1692VIVT virtually indexed, virtually tagged 1693VLAN virtual local area network 1694VLD variable-length decoding 1695VLIW very long instruction word 1696VLSI very large scale integration 1697VLSM variable length subnet mask 1698VM virtual {machine,memory} 1699VME virtual mode extension 1700VMX vector multimedia extensions 1701VMX virtual machine extensions 1702VNC virtual network computing 1703VOD video on demand 1704VPD vital product data 1705VPN virtual private network 1706VPWS virtual private wire service 1707VR virtual reality 1708VRAM video random access memory 1709VRF virtual routing and forwarding 1710VRM voltage regulator module 1711VROC Virtual RAID On CPU 1712VRRP Virtual Router Redundancy Protocol 1713VSTP VLAN Spanning Tree Protocol 1714VTP VLAN Trunking Protocol 1715VXFS Veritas file sytem 1716VXVM Veritas volume manager 1717W watt 1718W3C World Wide Web Consortium 1719WAFL write anywhere file layout 1720WAMP Web Application Messaging Protocol 1721WAN wide area network 1722WAP Wireless Application Protocol 1723WAP wireless access point 1724WDM Windows Driver Model 1725WDDM Windows Display Driver Model 1726WDT watchdog timer 1727WEP Wired Equivalent Privacy 1728WFI wait for interrupt 1729WFQ weighted fair queuing 1730WH write hit 1731WHEA Windows hardware error architecture 1732WIFI wireless fidelity 1733WLAN wireless local area network 1734WM write miss 1735WMI Windows Management Instrumentation 1736WOL Wake-on-LAN 1737WOM Wake-on-Modem 1738WOR Wake-on-Ring 1739WORM write once read many 1740WP WordPerfect 1741WP word processor 1742WP write protect 1743WPA Wi-Fi Protected Access 1744WPA2 Wi-Fi Protected Access II 1745WPAD web proxy auto-discovery protocol 1746WPS Wi-Fi Protected Setup 1747WRAM window random access memory 1748WS web services 1749WTC write through caching 1750WTD weighted tail drop 1751WWAN wireless wide area network 1752WWW world wide web 1753WYSIAYG what you see is all you get 1754WYSIWYG what you see is what you get 1755XBAR crossbar 1756XDMCP X Display Manager control protocol 1757XER XML encoding rules 1758XGA Extended Graphics Array 1759XHR XMLHttpRequest 1760XIP execute in place 1761XML Extensible Markup Language 1762XNA XNA's not acronymed 1763XNS Xerox network systems 1764XOR exclusive or 1765XP extreme programming 1766XSI X/Open System Interface 1767XSL extensible stylesheet language 1768XSLT extensible stylesheet language transformations 1769XSS cross site scripting 1770XT extended technology 1771XTACACS extended terminal access controller access-control system 1772XTI X/Open transport interface 1773XUL XML user interface language 1774YACC yet another compiler compiler 1775YAML YAML ain't markup language 1776YANG yet another next generation 1777YAWPFAPR you are welcome; please file a problem report 1778YP Yellow Pages 1779YTD year to date 1780ZAP ZFS attribute processor 1781ZBR zone bit recording 1782ZFOD zero-filled on demand 1783ZFS zettabyte file system 1784ZIF zero insertion force 1785ZIFS zero insertion force socket 1786ZIL ZFS intent log 1787ZMA zone multicast address 1788ZOI zero one infinity 1789ZOI zone of influence 1790ZPL ZFS Posix layer 1791ZVOL ZFS Volume 1792