acronyms.comp revision 1.291
1$NetBSD: acronyms.comp,v 1.291 2019/09/25 20:17:59 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 301CSU C start up 302CRT cathode ray tube 303CRUD create, read, update, and delete 304CS cable select 305CS chip select 306CS code segment 307CS computer science 308CSDL {common,conceptual} schema definition language 309CSI channel state information 310CSI common system interface 311CSMA carrier sense multiple access 312CSMA/CA carrier sense multiple access with collision avoidance 313CSMA/CD carrier sense multiple access with collision detection 314CSP communicating sequential processes 315CSP content security policy 316CSP constrain satisfaction problems 317CSP cryptographic service provider 318CSR control [and] status registers 319CSRG Computer Systems Research Group 320CSS cascading style sheets 321CST common spanning tree 322CSV comma-separated values 323CTF compact c type format 324CTM close to metal 325CTR counter [mode] 326CTS clear to send 327CTS common type system 328CUA common user access 329CUT coordinated universal time 330CV control voltage 331CVE common vulnerabilities and exposures 332CVS Concurrent Versions System 333DA destination address 334DAA distributed application architecture 335DAB digital audio broadcasting 336DAC digital [to] analog converter 337DAC discretionary access control 338DAD duplicate address detection 339DANE DNS-based Authentication of Named Entities 340DAO disk at once 341DAP Directory Access Protocol 342DAT digital audio tape 343DAT dynamic acceleration technology 344DB database 345DBA database administrator 346DBA dynamic bandwidth allocation 347DBB data bus buffer 348DBC design by contract 349DBL dynamic buffer limiting 350DBMS database management system 351DBS database server 352DC direct current 353DCC Direct Client-to-Client 354DCC direct cable connect 355DCD data carrier detect 356DCE data control equipment 357DCE distributed computing environment 358DCIM data center infrastructure management 359DCIM digital camera images 360DCL Digital Command Language 361DCOM distributed component object model 362DCOP Desktop COmmunication Protocol 363DCS data collection systems 364DCT discrete cosine transform 365DCU data cache unit 366DDC display data channel 367DDE dynamic data exchange 368DDI device drivers interface 369DDK device driver kit 370DDL data description language 371DDR double data rate 372DDS direct digital sound 373DDWG Digital Display Working Group 374DE debugging extensions 375DE desktop environment 376DEA data encryption algorithm 377DEC Digital Equipment Corporation 378DEK data encryption key 379DEP data execution prevention 380DER distinguished encoding rules 381DES Data Encryption Standard 382DF don't fragment 383DFA deterministic finite automaton 384DFC data flow control 385DFS depth first search 386DFS distributed file system 387DFSAN Data Flow Sanitizer 388DFT diagnostic function test 389DFT discrete Fourier transform 390DGL data generation language 391DH Diffie-Hellman 392DHCP Dynamic Host Configuration Protocol 393DIA dedicated Internet access 394DIFS distributed inter-frame space 395DIMM dual inline memory module 396DIRT design in real time 397DKI driver/kernel interface 398DL diode logic 399DL discrete logarithm 400DL download 401DLCI data link connection identifier 402DLE data link escape 403DLL dynamic link library 404DLP discrete logarithm problem 405DMA direct memory access 406DMI desktop management interface 407DMS document management system 408DMT discrete multitone modulation 409DMU data management layer 410DNARD Digital network appliance reference design 411DND drag and drop 412DNLC directory name lookup cache 413DNS Domain Name System 414DNSSEC DNS Security Extensions 415DOE distributed object environment 416DOF data over fibre 417DOM document object model 418DOS denial of service 419DOS disk operating system 420DP DisplayPort 421DPC deferred procedure call 422DPCM differential pulse code modulation 423DPD dead peer detection 424DPI deep packet inspection 425DPI dots per inch 426DPL descriptor privilege level 427DPS Display PostScript 428DPST display power savings technology 429DRAAS disaster recovery as a service 430DRAM dynamic random access memory 431DRBG deterministic random bit generator 432DRI direct rendering infrastructure 433DRM digital rights management 434DRRS display refresh rate switching 435DS debug store 436DS differentiated services 437DSA digital signature algorithm 438DSAP destination service access point 439DSB double-sideband modulation 440DSCP differentiated services code point 441DSDT differentiated system descriptor table 442DSF device special file 443DSL dataset and snapshot layer 444DSL digital subscriber line 445DSL domain specific language 446DSLAM digital subscriber line access multiplexer 447DSN delivery status notification 448DSO dynamic shared object 449DSP digital signal processor 450DSSS direct sequence spread spectrum 451DTB device tree blob 452DTC device tree compiler 453DTD document type definition 454DTE data terminal equipment 455DTE dumb terminal emulator 456DTL diode-transistor logic 457DTLS datagram transport layer security 458DTS device tree source 459DTS digital thermal sensor 460DUT device under test 461DVB digital video broadcasting 462DVCS distributed version control system 463DVD digital versatile disc 464DVFS dynamic voltage and frequency scaling 465DVI device independent 466DVI Digital Visual Interface 467DVR digital video recorder 468E-XER extended XML encoding rules 469EABI embedded-application binary interface 470EAI Email Address Internationalization 471EAI Enterprise Application Integration 472EAP Extensible Authentication Protocol 473EAPOL EAP over Lan 474EAV entity-attribute-value model 475EAV ethernet audio/video bridging 476EBCDIC Extended Binary Coded Decimal Interchange Code 477EBDA Extended BIOS Data Area 478EBNF extended backus-naur form 479EBR extended boot record 480EC elliptic curve 481ECC elliptic curve cryptography 482ECC error correction code 483ECDH elliptic curve Diffie-Hellman 484ECDL elliptic curve discrete logarithm 485ECDLP elliptic curve discrete logarithm problem 486ECDSA elliptic curve digital signature algorithm 487ECL emitter-coupled logic 488ECN explicit congestion notification 489ECP enhanced capability port 490ECS enhanced chip set 491ECS extended configuration space 492EDAC error detection and correction 493EDAT enhanced dynamic acceleration technology 494EdDSA Edwards curve digital signature algorithm 495EDGE explicit data graph execution 496EDID extended display identification data 497EDO extended data out 498EDS electronical data sheet 499EDSAC electronic delay storage automatic calculator 500EDVAC electronic discrete variable automatic computer 501EEE energy efficient ethernet 502EEPROM electrically erasable programmable read only memory 503EFI extensible firmware interface 504EFL emitter follower logic 505EFM eight to fourteen modulation 506EFS extent file system 507EGA Enhanced Graphics Adapter 508EGP exterior gateway protocol 509EH extension header 510EIDE enhanced IDE 511EISA extended industry standard architecture 512EINJ error injection table 513ELF executable and linking format 514ELS entry level system 515EMI electro-magnetic interference 516EMP electro-magnetic pulse 517EMR electro-magnetic radiation 518EMACS Editor MACroS 519ENIAC electronic numerical integrator and computer 520EOF end of file 521EOI end of interrupt 522EOIS end of interactive support 523EOL end of life 524EOL end of line 525EOT end of transmission 526EPIC explicitly parallel instruction computing 527EPP enhanced parallel port 528EPRML extended partial response, maximum likelihood 529EPROM erasable programmable read only memory 530ERC error recovery control 531ERD emergency recovery disk 532ERD entity relationship diagram 533ERE extended regular expression 534ERST error record serialization table 535ESAN Efficiency Sanitizer 536ESB enterprise service bus 537ESDI enhanced small disk interface 538ESDRAM enhanced synchronous dynamic random access memory 539ESI enclosure services interface 540ESS electronic switching system 541ESS extended service set 542ESSID extended service set identifier 543EST enhanced speedstep 544ETL extract, transform, load 545EU execution unit 546EULA end user license agreement 547FAT file allocation table 548FBRAM frame buffer random access memory 549FCIF full common intermediate format 550FCL fiber channel loop 551FCS frame check sequence 552FDC floppy disk controller 553FDD floppy disk drive 554FDDI fiber distributed data interface 555FDE full disk encryption 556FDT flattened device tree 557FEA finite element analysis 558FEC forward error correction 559FET field-effect transistor 560FF finite field 561FF form feed 562FFDH finite-field Diffie-Hellman 563FFH functional fixed hardware 564FFI foreign function interface 565FFM focus follows mouse 566FFS Fast File System 567FFS find first set 568FFT fast Fourier transform 569FG floating gate 570FHSS frequency hop spread spectrum 571FID frequency identifier 572FIFO first in, first out 573FILO first in, last out 574FIPS Federal Information Processing Standards 575FIR fast infrared 576FLOPS floating [point] operations per second 577FLOSS free/libre/open source software 578FM frequency modulation 579FMR false match rate 580FOSS free/open source software 581FPGA field programmable gate array 582FPM fast page mode 583FPR floating point register 584FPU floating point unit 585FQDN fully qualified domain name 586FRR false rejection rate 587FRU field replaceable unit 588FS file system 589FSB front side bus 590FSCK file system check 591FSF Free Software Foundation 592FSK frequency shift keying 593FSM finite-state machine 594FTA fault tree analysis 595FTL flash translation layer 596FTP File Transfer Protocol 597FTPS File Transfer Protocol Secure 598FUS fast user switching 599FWH firmware hub 600FWS folding white space 601GAL generic array logic 602GARP generic attribute registration protocol 603GAS generic address structure 604GC garbage collector 605GCM Galois counter mode 606GCR group-coded recording 607GDI Graphics Device Interface 608GDT global descriptor table 609GECOS general comprehensive operating supervisor 610GEM graphics environment manager 611GEM graphics execution manager 612GENA general event notification architecture 613GHC Glasgow Haskell compiler 614GHES generic hardware error source 615GIC generic interrupt controller 616GID group identifier 617GIF graphics interchange format 618GMCH graphics and memory controller hub 619GNU GNU's Not Unix 620GOP graphics output protocol 621GOT global offset table 622GPE general purpose event 623GPF general protection fault 624GPG GNU Privacy Guard 625GPL [GNU] General Public License 626GPR general purpose register 627GPS generalized processor sharing 628GPT GUID partition table 629GPU graphics processing unit 630GR golden ratio 631GRE generic routing encapsulation 632GSI global system interrupt 633GUI graphical user interface 634GUID globally unique identifier 635GVFS git virtual file system 636HA high availability 637HAL hardware abstraction layer 638HAT hashed array tree 639HATEOAS hypermedia as the engine of application state 640HBA host bus adapter 641HCF halt and catch fire 642HCI host controller interface 643HCI human-computer interaction 644HCL hardware compatibility list 645HDCP High-bandwidth Digital Content Protection 646HDD hard disk drive 647HDL hardware description language 648HDMI High-Definition Multimedia Interface 649HDTV high-definition television 650HECI host embedded controller interface 651HEST hardware error source table 652HEVC high efficiency video coding 653HF high frequency 654HFM highest frequency mode 655HFS hierarchical file system 656HID human interface device 657HKP HTTP Keyserver Protocol 658HLL high-level language 659HMA high memory area 660HMI human-machine interface 661HOOD hierarchical object oriented design 662HP Hewlett-Packard 663HPC high performance computing 664HPET high precision event timer 665HSM hardware security module 666HSM hierarchical storage management 667HT hyper-threading 668HTC hardware thermal control 669HTCC high temperature co-fired ceramic 670HTML HyperText Markup Language 671HTT hyper-threading technology 672HTTP Hypertext Transfer Protocol 673HTTPS Hypertext Transfer Protocol Secure 674HVM hardware virtual machine 675HVDS High-Voltage Differential Signaling 676HWASAN Hardware-assisted Address Sanitizer 677HZ Hertz 678I2O intelligent input/output 679IA information assurance 680IAAS infrastructure as a service 681IANA Internet Assigned Numbers Authority 682IBC iterated block cipher 683IBM International Business Machines 684IBPI international blinking pattern interpretation 685IBS instruction based sampling 686IBSS independent basic service set 687IC integrated circuit 688ICA independent computer architecture 689ICACLS integrity control access control lists 690ICB Internet Citizen's Band 691ICE in-circuit emulator 692ICE internal compiler error 693ICH I/O controller hub 694ICMP Internet Control Message Protocol 695ICT information and communications technology 696ICW initialization command word 697IDA Intel dynamic acceleration 698IDCMP Intuition direct communication message port 699IDCT inverse discrete cosine transform 700IDE integrated development environment 701IDE integrated drive electronics 702IDPS intrusion detection [and] prevention system 703IDRP inter-domain routing protocol 704IDS intrusion detection system 705IDT interrupt descriptor table 706IE Internet Explorer 707IEC International Electrotechnical Commission 708IEEE Institute of Electrical and Electronics Engineers 709IESG Internet Engineering Steering Group 710IETF Internet Engineering Task Force 711IF intermediate frequency 712IFCM isochronous flow control mode 713IFF Interchange File Format 714IFS internal field separator 715IGD Internet gateway device 716IGMP Internet Group Management Protocol 717IGP interior gateway protocol 718IHV independent hardware vendor 719IKE Internet key exchange 720ILM internal loopback mode 721ILOM integrated lights-out management 722ILP instruction level parallelism 723IM instant messaging 724IMAP Internet Message Access Protocol 725IMC integrated memory controller 726IMCR interrupt mode configuration register 727IMR interrupt mask register 728IMS information management system 729IMSI international mobile subscriber identity 730INCITS InterNational Committee for Information Technology Standards 731INODE index node 732IO input/output 733IOCTL input/output control 734IOM input/output managers 735IOMMU input/output memory management unit 736IOT Internet of Things 737IP Internet Protocol 738IP intellectual property 739IPC instructions per cycle 740IPC interprocess communication 741IPCF interprocess communication facility 742IPE integrated programming environment 743IPI intelligent peripheral interface 744IPI interprocessor interrupt 745IPL Initial Program Load 746IPL Interrupt Priority Level 747IPMB Intelligent Platform Management Bus 748IPMI Intelligent Platform Management Interface 749IPNG Internet Protocol, Next Generation 750IPS in-plane switching 751IPS intrusion prevention system 752IPSEC Internet Protocol Security 753IRC Internet Relay Chat 754IRDA infrared data association 755IRDP ICMP Router Discovery Protocol 756IRQ interrupt request 757IRQL interrupt request level 758IRR interrupt request register 759IRTF Internet Research Task Force 760IS information system 761ISA industry standard architecture 762ISA instruction set architecture 763ISE instant secure erase 764ISDN integrated services digital network 765ISI inter-symbol interference 766ISL initial system load 767ISM industrial, scientific, [and] medical 768ISN initial serial number 769ISO International Standards Organization 770ISOC Internet Society 771ISP Internet service provider 772ISR in-service register 773ISR interrupt service routine 774IST internal spanning tree 775IST interrupt stack table 776ISV independent software vendor 777IT information technology 778ITB Intel Turbo Boost 779ITIL information technology infrastructure library 780ITP in-target probe 781ITSM IT service management 782IV initialization vector 783IVT interrupt vector table 784JBOD just a bunch of disks 785JCL Job Control Language 786JFET junction [gate] field-effect transistor 787JIT just in time 788JPEG Joint Photographic Experts Group 789JRE Java Runtime Environment 790JSON JavaScript Object Notation 791JTAG joint test action group 792KASLR kernel address space layout randomization 793KB keyboard 794KB kilobyte 795KBD keyboard 796KBD kilobaud 797KCS keyboard controller style 798KLOC thousand lines of code 799KMS kernel-mode setting 800KPI kernel programming interface 801KVA kernel virtual address 802KVM kernel virtual machine 803KVM kernel virtual memory 804KVM keyboard, video, [and] mouse 805L2CAP link layer control and adaptation protocol 806LAMP Linux Apache MySQL {Perl,PHP,Python} 807LAN local area network 808LAPIC local advanced programmable interrupt controller 809LAR load access rights 810LBA logical block addressing 811LBNF labeled backus-naur form 812LBS location-based service 813LCD liquid crystal display 814LCP link control protocol 815LDA local delivery agent 816LDAP Lightweight Directory Access Protocol 817LDR light-dependent resistor 818LDT local descriptor table 819LE logical extent 820LED light emitting diode 821LELL low energy link layer 822LER label edge router 823LF line feed 824LF low frequency 825LFM lowest frequency mode 826LFN long file names 827LFO low-frequency oscillation 828LFS log-structured file system 829LFU least frequently used 830LHP loop heat pipe 831LIF logical interchange format 832LIFO last in, first out 833LILO LInux LOader 834LILO last in, last out 835LINT local interrupt 836LIR local Internet registry 837LISP LISt Processor 838LISP Locator/ID Separation Protocol 839LKM {Linux,loadable} kernel module 840LKML Linux kernel mailing list 841LL load linked 842LL/SC load linked/store conditional 843LLC logical link control 844LLD low-level design 845LLDD low-level design document 846LLDP link layer discovery protocol 847LLF low level format 848LLMNR link-local multicast name resolution 849LLVM Low Level Virtual Machine 850LM long mode 851LMCE local machine check exception 852LMI local management interface 853LMM link management mode 854LMP link management protocol 855LNO loop nest optimization 856LOC lines of code 857LOM lights-out management 858LPE Linux performance events 859LPC low pin count 860LPS local positioning system 861LRC longitudinal redundancy check 862LRM left-to-right mark 863LRO left-to-right override 864LRU least recently used 865LS link state 866LSAN Leak Sanitizer 867LSB Linux standards base 868LSB least significant {bit,byte} 869LSI large scale integration 870LSL load segment limit 871LSM log structured merge 872LSN Large Scale NAT 873LSN log sequence number 874LSR label switch router 875LTCC low temperature co-fired ceramic 876LTO linear tape-open 877LTO link time optimization 878LTR left to right 879LTR load task register 880LTR letter(-sized paper) 881LTS long term support 882LUA Lua Uppercase Accident 883LUN logical unit number 884LV logical volume 885LVM logical volume management 886LVT local vector table 887LVDS Low-Voltage Differential Signaling 888LWP light-weight process 889LZSS Lempel Ziv Storer Szymanski 890LZW Lempel Ziv Welch 891MAB MAC authentication bypass 892MAC mandatory access control 893MAC {media,medium} access control 894MAC message authentication {check,code} 895MADT multiple APIC descriptor table 896MAMR microwave-assisted magnetic recording 897MB megabyte 898MBA multi-boot agent 899MBR master boot record 900MBS megabits per second 901MC memory controller 902MCA machine check architecture 903MCA MicroChannel architecture 904MCC multiversion concurrency control 905MCE machine check exception 906MCGA Multi-Color Graphics Array 907MCH memory controller hub 908MCLAG multi-chassis link aggregation 909MCM multi-chip module 910MCQ memory controlled queue 911MD machine-dependent 912MD-SAL model-driven service abstraction layer 913MDA mail delivery agent 914MDA Monochrome Display Adapter 915MDC Management Data Clock 916MDI Medium Dependent Interface 917MDI-X Medium Dependent Interface Crossover 918MDIO Management Data Input/Output 919MDMX MIPS Digital Media eXtension 920MDRAM multibank dynamic random access memory 921MESI modified, exclusive, shared, invalid 922MFC merge from current 923MFC Microsoft Foundation Classes 924MFM modified frequency modulation 925MFU most frequently used 926MGCP media gateway control protocol 927MHU message handling unit 928MI machine-independent 929MI machine interface 930MIB management information base 931MIC message integrity {check,code} 932MID mobile Internet device 933MIDI musical instrument digital interface 934MIF management information format 935MII media independent interface 936MIM man in the middle 937MIMD multiple instruction, multiple data 938MIME Multipurpose Internet Mail Extensions 939MIMO multiple input multiple output 940MIPS million instructions per second 941MIPS Microprocessor without Interlocked Pipeline Stages 942MISD multiple instruction, single data 943MIT Massachusetts Institute of Technology 944MITM man in the middle 945ML machine language 946ML machine learning 947ML mailing list 948ML markup language 949ML maximum likelihood 950MLC multi-level cell 951MLD multicast listener discovery 952MLHP micro loop heat pipe 953MMF multi-mode fiber 954MMIC monolithic microwave integrated circuit 955MMIO memory mapped input/output 956MMORPG massive multiplayer online role playing game 957MMRP multiple MAC registration protocol 958MMU memory management unit 959MMX matrix math extension 960MMX multimedia extension 961MMX multiple math extension 962MO magneto-optical 963MOESI modified, owned, exclusive, shared, invalid 964MOF maximum operating frequency 965MOSFET metal-oxide-semiconductor field-effect transistor 966MOSI modified, owned, shared, invalid 967MP multi-platform 968MP multiplayer 969MP {multiprocessing,multiprocessor} 970MPEG moving picture experts group 971MPI message passing interface 972MPLS Multiprotocol Label Switching 973MPP massively parallel processor 974MPS memory pool system 975MPS multiprocessor specification 976MQTT Message Queuing Telemetry Transport 977MR modem ready 978MRO method resolution order 979MRP multiple registration protocol 980MRU most recently used 981MS Microsoft 982MSAN Memory Sanitizer 983MSB most significant {bit,byte} 984MSC message sequence chart 985MSE mean square error 986MSF minutes seconds frames 987MSI message signaled interrupt 988MSI modified, shared, invalid 989MSR {machine state,model-specific} register 990MSS maximum segment size 991MSTP Multiple Spanning Tree Protocol 992MT machine translation 993MTA mail transfer agent 994MTBF mean time between failures 995MTP media transfer protocol 996MTRR memory type range register 997MTTF mean time to failure 998MTU maximum transmission unit 999MUA mail user agent 1000MUD multi-user domain 1001MVCC multiversion concurrency control 1002MVR multicast VLAN registration 1003MVRP multiple VLAN registration protocol 1004MWE module width encoding 1005MX mail exchange 1006NACK negative acknowledgement 1007NAK negative acknowledgement 1008NAN not a number 1009NAPT Network Address Port Translation 1010NAS network attached storage 1011NAT network address translation 1012NAV network allocation vector 1013NC numerical control 1014NC-SI network controller sideband interface 1015NCO numerically-controlled oscillator 1016NCP Network Control Protocol 1017NCSI network connectivity status indicator 1018NCQ native command queuing 1019ND neighbor discovery 1020NDFA nondeterministic finite automaton 1021NDIS network driver interface specification 1022NE numeric error 1023NEWS Network extensible Window System 1024NFA nondeterministic finite automaton 1025NFC near-field communication 1026NFCI no functional change intended 1027NFS network file system 1028NFV network function virtualization 1029NIA next instruction address 1030NIC network information center 1031NIC network interface card 1032NIDS network intrusion detection system 1033NIP network interface protocol 1034NIPS network intrusion prevention system 1035NIS network information service 1036NIST National Institute of Standards and Technology 1037NLS native language support 1038NMI non-maskable interrupt 1039NNTP Network News Transfer Protocol 1040NOC network operations center 1041NOP no operation 1042NOS network operating system 1043NP nondeterministic polynomial time 1044NRND not recommended for new designs 1045NRZ non-return to zero 1046NSA nation-state adversary 1047NSA no such agency 1048NSA National Security Agency 1049NTM non-deterministic Turing machine 1050NTP Network Time Protocol 1051NUMA non-uniform memory access 1052NURBS non-uniform rational basis spline 1053NVMM NetBSD Virtual Machine Monitor 1054NVMM non-volatile main memory 1055NVRAM non-volatile random access memory 1056NW not write-through 1057NX no execute 1058OAEP optimal asymmetric encryption padding 1059OAM operations, administration, and {management,maintenance} 1060OBO off by one 1061OBOE off by one error 1062OCL object constraint language 1063OCR optical character recognition 1064ODE offline device environment 1065ODI open data-link interface 1066ODM object data manager 1067ODCM on-demand clock modulation 1068ODT on-die termination 1069OEM original equipment manufacturer 1070OFB output feedback 1071OFDM orthogonal frequency division multiplexing 1072OFET organic field-effect transistor 1073OLAP online analytical processing 1074OLE object linking and embedding 1075OLTP online transaction processing 1076ONFI open nand flash interface 1077OO OpenOffice 1078OO object oriented 1079OOB out of band 1080OOE out of order execution 1081OOM out of memory 1082OOO OpenOffice.org 1083OOP object oriented programming 1084OOPS object oriented programming systems 1085OOSE object oriented software engineering 1086OPM operations per minute 1087OPS operations per second 1088OQL Object Query Language 1089ORB object request broker 1090ORM object-relational mapping 1091OS operating system 1092OSD open source definition 1093OSF open software foundation 1094OSI Open Source Initiative 1095OSI open systems interconnection 1096OSPF open shortest path first 1097OSPM OS power management 1098OSS open sound system 1099OSS open source software 1100OSVW operating system visible workarounds 1101OTP one time password 1102OTP open telecom platform 1103OU organizational unit 1104OUI organizationally unique identifier 1105OWL Web Ontology Language 1106P2P PCI to PCI 1107P2P peer to peer 1108PA phase accumulator 1109PA physical address 1110PAAS platform as a service 1111PAC phase-amplitude converter 1112PAE physical address extension 1113PAGP port aggregation protocol 1114PAL phase alternating line 1115PAL programmable array logic 1116PAM pluggable authentication modules 1117PAM pulse amplitude modulation 1118PAP password authentication protocol 1119PAT page attribute table 1120PAT port address translation 1121PATA parallel ATA 1122PAX portable archive exchange 1123PBE pending break encoding 1124PBE programming by example 1125PC personal computer 1126PC program counter 1127PCB printed circuit board 1128PCB process control block 1129PCB Protocol Control Block 1130PCC Portable C Compiler 1131PCD page-level cache disable 1132PCE path computation element 1133PCE performance-monitor counter enable 1134PCEP Path Computation Element Protocol 1135PCH platform controller hub 1136PCI peripheral component interconnect 1137PCM phase change memory 1138PCM pulse code modulation 1139PCMCIA Personal Computer Memory Card International Association 1140PCP Port Control Protocol 1141PD public domain 1142PDA personal digital assistant 1143PDA pushdown automaton 1144PDAG propositional directed acyclic graph 1145PDB power distribution board 1146PDF portable document format 1147PDM pulse-duration modulation 1148PDN pull-down network 1149PDP page {descriptor,directory} page 1150PDS product data sheet 1151PDU protocol data unit 1152PE protection enable 1153PE provider edge 1154PEAP Protected EAP 1155PECI platform environment control interface 1156PEP protocol extension protocol 1157PER packed encoding rules 1158PFS perfect forward secrecy 1159PGAS partitioned global address space 1160PGE page global enable 1161PGP Pretty Good Privacy 1162PHB PCI host bridge 1163PHP PHP: Hypertext Preprocessor 1164PIC performance instrumentation counters 1165PIC position independent code 1166PIC programmable interrupt controller 1167PICNIC problem in chair, not in computer 1168PID process id 1169PIE position independent executable 1170PIL Priority Interrupt Level 1171PIM personal information manager 1172PIM platform-independent model 1173PIO programmed input/output 1174PIPT physically indexed, physically tagged 1175PIQ prefetch input queue 1176PIT programmable interrupt timer 1177PIV personal identity verification 1178PIX Private Internet eXchange 1179PKCS public-key cryptography standards 1180PKI public key infrastructure 1181PLC programmable logic controller 1182PLD programmable logic device 1183PLL phase locked loop 1184PLRU pseudo LRU 1185PLTM package level thermal management 1186PM power management 1187PM {phase,pulse} modulation 1188PMC performance monitoring counters 1189PME power management event 1190PMEG page map entry group 1191PMI performance monitoring infrastructure 1192PMI platform management interrupt 1193PMIC power management integrated circut 1194PMIO port-mapped input/output 1195PMT photo-multiplier tube 1196PMU performance monitoring units 1197PMU power management unit 1198PNG portable network graphics 1199PNP plug and play 1200POE power over ethernet 1201POF probability of failure 1202POP Post Office Protocol 1203POP power on password 1204POR plan of record 1205POSIX Portable Operating System Interface [for Unix] 1206POST power on self test 1207POTS plain old telephone system 1208POWER Performance Optimization With Enhanced RISC 1209POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1210PP pair programming 1211PPB PCI [to] PCI bridge 1212PPC PowerPC 1213PPC Power Performance Computing 1214PPI pixels per inch 1215PPM pages per minute 1216PPP Point-to-Point Protocol 1217PPPOA Point-to-Point Protocol over ATM 1218PPPOE Point-to-Point Protocol over Ethernet 1219PPR processor programming reference 1220PPT powerpoint 1221PPT punched paper tape 1222PPU physics processing unit 1223PRAM Parameter RAM 1224PRBS pseudorandom bit sequence 1225PRG pseudorandom generator 1226PRF pseudorandom function [family] 1227PRML partial response, maximum likelihood 1228PRN pseudorandom {noise,number} 1229PRNG pseudorandom number generator 1230PROM programmable read only memory 1231PRP pseudorandom permutation 1232PRU Programmable Realtime Unit 1233PS PostScript 1234PSD power spectral density 1235PSE page size extensions 1236PSK phase shift keying 1237PSK pre-shared key 1238PSTN public switched telephone network 1239PSW program status word 1240PTE page table entry 1241PTLA pseudo top level aggregator 1242PTP page table page 1243PTV perceived target value 1244PU processing unit 1245PUC personal unblocking code 1246PUN physical unit number 1247PV physical volume 1248PVC permanent virtual circuit 1249PVG physical volume group 1250PVI protected-mode virtual interrupt 1251PVRST Per-VLAN rapid spanning tree 1252PVST Per-VLAN Spanning Tree 1253PWM pulse width modulation 1254PXE preboot execution environment 1255QA quality assurance 1256QAM quadrature amplitude modulation 1257QAM quality assurance management 1258QBE query by example 1259QC quality control 1260QDI quasi delay insensitive 1261QCIF quarter common intermediate format 1262QOS quality of service 1263QVL qualified vendor list 1264R/O read only 1265R/W read/write 1266RA receiver address 1267RA remote assistance 1268RA resource affinity 1269RA router advertisement 1270RAD rapid application development 1271RADIUS remote authentication dial-in user service 1272RAID redundant array of {independent,inexpensive} disks 1273RAM random access memory 1274RAS reliability, availability and serviceability 1275RAS remote access service 1276RAS restartable atomic sequence 1277RAS row address strobe 1278RBF radial basis function 1279RBNF routing backus-naur form 1280RBT red-black tree 1281RC release candidate 1282RC remote control 1283RC run commands 1284RCS Revision Control System 1285RCS revision control system 1286RCU read, copy, update 1287RDB Rigid Disk Block 1288RDBMS relational database management system 1289RDF Resource Description Framework 1290RDM relational data model 1291RDMA remote direct memory access 1292RDP remote desktop protocol 1293RDRAM Rambus DRAM 1294RE regular expression 1295REPL read, evaluate, print, loop 1296REST representational state transfer 1297RF radio frequency 1298RFB remote frame buffer 1299RFI radio frequency interference 1300RFO request for ownership 1301RFU reserved for future use 1302RGB red green blue 1303RGBA red green blue alpha 1304RGMII reduced gigabit media independent interface 1305RH read hit 1306RHEL Red Hat Enterprise Linux 1307RHL Red Hat Linux 1308RIB routing information base 1309RIFF Resource Interchange File Format 1310RIP Raster Image Processor 1311RIP Routing Information Protocol 1312RIR regional Internet registry 1313RISC reduced instruction set {computer,computing} 1314RKM ROM Kernel Manual 1315RLE run length encoding 1316RLL run length limited 1317RLO right-to-left override 1318RM read miss 1319RMCP Remote Management Control Protocol 1320RMI remote method invocation 1321RMO Relaxed Memory Ordering 1322RMPM rapid memory power management 1323RMS root mean square 1324RMW read, modify, write 1325RNG random number generator 1326ROM read only memory 1327RPC remote procedure call 1328RPKI resource PKI 1329RPL requested privilege level 1330RPM revolutions per minute 1331RPN reverse Polish notation 1332RPVST Rapid Per-VLAN Spanning Tree 1333RR random replacement 1334RR round robin 1335RS relay station 1336RSA Rivest, Shamir, [and] Adleman 1337RSIP Realm Specific IP 1338RSN Robust Secure Network 1339RSS really simple syndication 1340RSS residual sum of squares 1341RSTP Rapid Spanning Tree Protocol 1342RT real time 1343RTC real time clock 1344RTC real time computing 1345RTF rich text format 1346RTL register transfer language 1347RTL resistor-transistor logic 1348RTL right to left 1349RTOS real time operating system 1350RTS request to send 1351RTT round trip time 1352RUP rational unified process 1353RW Rabin-Williams 1354RWM read-write memory 1355RX {receive,receiver} 1356S/PDIF Sony/Philips Digital Interface Format 1357SA security advisory 1358SA security association 1359SA source address 1360SA structured analysis 1361SAAS software as a service 1362SABRE Semi-automated business research environment 1363SACD super audio compact disc 1364SAD security association database 1365SAF-TE SCSI accessed fault-tolerant enclosure 1366SAGE Semi-automated ground environment 1367SAL {service,system} abstraction layer 1368SAM serial access memory 1369SAM sum addressed memory 1370SAML security assertion markup language 1371SAN storage area network 1372SAP service access point 1373SAPIC streamlined advanced programmable interrupt controller 1374SASD structured analysis, structured design 1375SASI Shugart Associates System Interface 1376SASL simple authentication [and] security layer 1377SATA serial advanced technology attachment 1378SAX simple API for XML 1379SB sound blaster 1380SBSA server base system architecture 1381SBU standard build unit 1382SC store conditional 1383SCA source code analyzer 1384SCADA supervisory control and data acquisition 1385SCC single chip cloud 1386SCC source code control 1387SCCP skinny call control protocol 1388SCCS Source Code Control System 1389SCI scalable coherent interface 1390SCI system control interrupt 1391SCM software configuration management 1392SCM source code management 1393SCM storage-class memory 1394SCO synchronous connection orientated 1395SCP secure copy 1396SCP system control processor 1397SCPI system control and power interface 1398SCSI Small Computer System Interface 1399SCTP Stream Control Transmission Protocol 1400SDDC software defined data center 1401SDEI software delegated exception interface 1402SDI symbol deinterleave 1403SDK software development kit 1404SDL Simple Declarative Language 1405SDL Simple Direct-media Layer 1406SDLC {software,system,systems} development life cycle 1407SDN software defined networking 1408SDP Session Description Protocol 1409SDR software defined radio 1410SDRAM synchronous dynamic random access memory 1411SDS software defined storage 1412SDT syntax-directed translation 1413SEA synchronous external abort 1414SEGV segmentation violation 1415SED self-encrypting drive 1416SED stream editor 1417SEMB serial ATA enclosure management bridge 1418SEO search engine optimization 1419SES SCSI enclosure services 1420SFC sequential function chart 1421SFI simple firmware interface 1422SFI software fault isolation 1423SFTP SSH File Transfer Protocol 1424SFTP Serial File Transfer Protocol 1425SFTP Simple File Transfer Protocol 1426SGI Silicon Graphics, Inc 1427SGI software generated interrupt 1428SGMII serial gigabit media independent interface 1429SGPIO serial general purpose input/output 1430SGRAM synchronous graphics random access memory 1431SHA secure hash algorithm 1432SICP structure and interpretation of computer programs 1433SIDH supersingular isogeny Diffie-Hellman 1434SIEM security information and event management 1435SIF source input format 1436SIFS short inter-frame space 1437SIM subscriber identity module 1438SIMD single instruction, multiple data 1439SIMM single inline memory module 1440SIP Session Initiation Protocol 1441SIR signal-to-interference ratio 1442SIR slow infrared 1443SISD single instruction, single data 1444SLAAC stateless address auto-configuration 1445SLC single-level cell 1446SLDRAM synchronous-link dynamic random access memory 1447SLED single large expensive disk 1448SLI scalable link interface 1449SLI scan-line interleave 1450SLIC system license internal code 1451SLOC source lines of code 1452SLRU segmented LRU 1453SMA smart memory access 1454SMAF system management action field 1455SMAP Simple Mail Access Protocol 1456SMAP supervisor mode access prevention 1457SMART self-monitoring analysis and reporting technology 1458SMB Server Message Block 1459SMB system management bus 1460SMBIOS System Management BIOS 1461SMC system management controller 1462SMD storage module device 1463SMEP supervisor mode execution protection 1464SMF single mode fiber 1465SMI structure of management information 1466SMI system management interrupt 1467SMM system management mode 1468SMP serial management protocol 1469SMP symmetric multiprocessing 1470SMT simultaneous multithreading 1471SMTP Simple Mail Transfer Protocol 1472SMU system management unit 1473SNA systems network architecture 1474SNAP Sub-Network Access Protocol 1475SNIA Storage Networking Industry Association 1476SNMP Simple Network Management Protocol 1477SNR signal-to-noise ratio 1478SOA service oriented architecture 1479SOAP Simple Object Access Protocol 1480SOC system on chip 1481SOF start of frame 1482SOH start of header 1483SOHO small office/home office 1484SOL serial over LAN 1485SOM system on module 1486SP service pack 1487SP stack pointer 1488SPA storage pool allocator 1489SPAN switched port analyzer 1490SPARC scalable processor architecture 1491SPARQL SPARQL Protocol and RDF Query Language 1492SPD security policy database 1493SPD serial presence detect 1494SPDIF Sony/Philips digital interface format 1495SPI serial peripheral interface 1496SPI stateful packet inspection 1497SPL system interrupt priority level 1498SPL spinlock 1499SPMD single process, multiple data 1500SPR special purpose register 1501SPT sectors per track 1502SQA software quality assurance 1503SQCIF sub quarter common intermediate format 1504SQL Structured Query Language 1505SRAM static random access memory 1506SRC sample rate conversion 1507SRP SCSI RDMA protocol 1508SRR shaped round robin 1509SS self-snoop 1510SS stack segment 1511SSA static single assignment 1512SSAP source service access point 1513SSB single-sideband modulation 1514SSC spread spectrum clock 1515SSD solid state drive 1516SSE streaming SIMD extensions 1517SSFDC solid state floppy disc card 1518SSH secure shell 1519SSI server side includes 1520SSID service set identifier 1521SSL secure sockets layer 1522SSP stack smashing protection 1523STC software thermal control 1524STD state transition diagram 1525STM software transactional memory 1526STOMP Streaming Text Oriented Messaging Protocol 1527STP Spanning Tree Protocol 1528STP shielded twisted pair 1529STRG spanning tree root guard 1530SUN Stanford University Network 1531SUS Single Unix Specification 1532SUT system under test 1533SVC switched virtual circuit 1534SVG scalable vector graphics 1535SVGA Super Video Graphics Array 1536SVI {switch,switched} virtual interface 1537SVM secure virtual machine 1538SVM support vector machine 1539SVR System V Release 1540SVS Separate Virtual Space 1541SWF Shockwave Flash 1542SWIG simplified wrapper [and] interface generator 1543SYR symbol timing recovery 1544TA test assertion 1545TA transmitter address 1546TACACS terminal access controller access-control system 1547TAI international atomic time 1548TAO track at once 1549TAOCP The Art of Computer Programming 1550TAP Test Anything Protocol 1551TAS test and set 1552TB terabyte 1553TBNF transitional backus-naur form 1554TCB trace capture buffer 1555TCB trusted computing base 1556TCC thermal control circuit 1557TCL tool command language 1558TCP Transmission Control Protocol 1559TCQ tagged command queueing 1560TDC time [to] digital converter 1561TDD test-driven development 1562TDD time division duplex 1563TDM time division multiplexing 1564TDMA time division multiple access 1565TDOA time difference of arrival 1566TDP thermal design {point,power} 1567TDR time-domain reflectometry 1568TECO Text Editor and Corrector 1569TFT thin film transistor 1570TFTP Trivial File Transfer Protocol 1571TIAS try it and see 1572TIFF tagged image file format 1573TITS try it to see 1574TK temporal key 1575TKIP Temporal Key Integrity Protocol 1576TLA top level aggregator 1577TLB translation lookaside buffer 1578TLD top level domain 1579TLER time-limited error recovery 1580TLI transport layer interface 1581TLS thread local storage 1582TLS transport layer security 1583TM Turing machine 1584TM thermal monitor 1585TMG transmogrifier 1586TMDS transition minimized differential signaling 1587TMO timeout 1588TOD time of day 1589TOS terms of service 1590TOS trusted operating system 1591TOS type of service 1592TP transaction processing 1593TPI tracks per inch 1594TPM transactions per minute 1595TPM trusted platform module 1596TPR task priority register 1597TPS transactions per second 1598TPS transmission parameters signaling 1599TR task register 1600TR token ring 1601TRL timing recovery loop 1602TRNG true random number generator 1603TS terminal services 1604TS time series 1605TS time stamp 1606TS transport stream 1607TSAN Thread Sanitizer 1608TSC time stamp counter 1609TSD time stamp disable 1610TSDB time series database 1611TSL test, set, lock 1612TSO time sharing option 1613TSO Total Store Ordering 1614TSP Time-Stamp Protocol 1615TSP Tunnel Setup Protocol 1616TSP time synchronization protocol 1617TSP traveling salesman problem 1618TSS task state segment 1619TTL time to live 1620TTL transistor-transistor logic 1621TTM translation table maps 1622TTY teletype 1623TUI {terminal,text-based,textual} user interface 1624TX {transmit out,transmitter} 1625TXG transaction group 1626TZ time zone 1627UAC user {access,account} control 1628UAF use-after-free 1629UART universal asynchronous receiver/transmitter 1630UAT user acceptance testing 1631UB undefined behavior 1632UBSAN Undefined Behavior Sanitizer 1633UC uncacheable 1634UCS uniform-cost search 1635UCS unified computing system 1636UCS universal coded character set 1637UDI uniform driver interface 1638UDMA ultra DMA 1639UDO ultra density optical 1640UDP User Datagram Protocol 1641UEFI unified extensible firmware interface 1642UFS Unix File System 1643UGA universal graphics adapter 1644UI unit interval 1645UI user interface 1646UICC universal integrated circuit card 1647UID unique identifier 1648UID user identifier 1649UL upload 1650UMA uniform memory access 1651UMA upper memory area 1652UMB upper memory block 1653UML unified modeling language 1654UMPC ultra-mobile PC 1655UPNP universal plug and play 1656UPS uninterruptible power supply 1657URI uniform resource identifier 1658URL uniform resource locator 1659URN uniform resource name 1660USART universal synchronous/asynchronous receiver/transmitter 1661USB universal serial bus 1662USWC uncacheable speculative write combining 1663UT unit test 1664UTC coordinated universal time 1665UTF unicode transformation formats 1666UTP unshielded twisted pair 1667UTS UNIX time-sharing 1668UUCP Unix-to-Unix Copy Protocol 1669UUID universally unique identifier 1670UUOC useless use of cat 1671UUT unit under test 1672UX user experience 1673VA vertical alignment 1674VA virtual address 1675VA volt-ampere 1676VAX virtual address extension 1677VB Visual Basic 1678VCA variable-gain amplifier 1679VCC common collector voltage 1680VCCP virtual chassis control protocol 1681VCF voltage-controlled filter 1682VCM virtual channel memory 1683VCO voltage-controlled oscillator 1684VCP virtual chassis port 1685VCS version control system 1686VDPAU Video Decode and Presentation API for Unix 1687VES virtual execution system 1688VESA Video Electronics Standards Association 1689VFO variable-frequency oscillator 1690VFS virtual file system 1691VG volume group 1692VGA Video Graphics Array 1693VHDCI very high density cable interconnect 1694VID {VLAN,voltage level} identifier 1695VIM Vi IMproved 1696VIPT virtually indexed, physically tagged 1697VIVT virtually indexed, virtually tagged 1698VLAN virtual local area network 1699VLD variable-length decoding 1700VLIW very long instruction word 1701VLSI very large scale integration 1702VLSM variable length subnet mask 1703VM virtual {machine,memory} 1704VME virtual mode extension 1705VMX vector multimedia extensions 1706VMX virtual machine extensions 1707VNC virtual network computing 1708VOD video on demand 1709VPD vital product data 1710VPN virtual private network 1711VPWS virtual private wire service 1712VR virtual reality 1713VRAM video random access memory 1714VRF virtual routing and forwarding 1715VRM voltage regulator module 1716VROC Virtual RAID On CPU 1717VRRP Virtual Router Redundancy Protocol 1718VSTP VLAN Spanning Tree Protocol 1719VTP VLAN Trunking Protocol 1720VXFS Veritas file sytem 1721VXVM Veritas volume manager 1722W watt 1723W3C World Wide Web Consortium 1724WAFL write anywhere file layout 1725WAMP Web Application Messaging Protocol 1726WAN wide area network 1727WAP Wireless Application Protocol 1728WAP wireless access point 1729WDM Windows Driver Model 1730WDDM Windows Display Driver Model 1731WDT watchdog timer 1732WEP Wired Equivalent Privacy 1733WFI wait for interrupt 1734WFQ weighted fair queuing 1735WH write hit 1736WHEA Windows hardware error architecture 1737WIFI wireless fidelity 1738WLAN wireless local area network 1739WM write miss 1740WMI Windows Management Instrumentation 1741WOL Wake-on-LAN 1742WOM Wake-on-Modem 1743WOR Wake-on-Ring 1744WORM write once read many 1745WP WordPerfect 1746WP word processor 1747WP write protect 1748WPA Wi-Fi Protected Access 1749WPA2 Wi-Fi Protected Access II 1750WPAD web proxy auto-discovery protocol 1751WPS Wi-Fi Protected Setup 1752WRAM window random access memory 1753WS web services 1754WTC write through caching 1755WTD weighted tail drop 1756WWAN wireless wide area network 1757WWW world wide web 1758WYSIAYG what you see is all you get 1759WYSIWYG what you see is what you get 1760XBAR crossbar 1761XDMCP X Display Manager control protocol 1762XER XML encoding rules 1763XGA Extended Graphics Array 1764XHR XMLHttpRequest 1765XIP execute in place 1766XML Extensible Markup Language 1767XNA XNA's not acronymed 1768XNS Xerox network systems 1769XOR exclusive or 1770XP extreme programming 1771XSI X/Open System Interface 1772XSL extensible stylesheet language 1773XSLT extensible stylesheet language transformations 1774XSS cross site scripting 1775XT extended technology 1776XTACACS extended terminal access controller access-control system 1777XTI X/Open transport interface 1778XUL XML user interface language 1779YACC yet another compiler compiler 1780YAML YAML ain't markup language 1781YANG yet another next generation 1782YAWPFAPR you are welcome; please file a problem report 1783YP Yellow Pages 1784YTD year to date 1785ZAP ZFS attribute processor 1786ZBR zone bit recording 1787ZFOD zero-filled on demand 1788ZFS zettabyte file system 1789ZIF zero insertion force 1790ZIFS zero insertion force socket 1791ZIL ZFS intent log 1792ZMA zone multicast address 1793ZOI zero one infinity 1794ZOI zone of influence 1795ZPL ZFS Posix layer 1796ZVOL ZFS Volume 1797