acronyms.comp revision 1.282
1$NetBSD: acronyms.comp,v 1.282 2019/07/23 18:13:47 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 112ATM asynchronous transfer mode 113ATX advanced technology extended 114AV anti virus 115AVB audio video bridging 116AVL Adelson-Velsky-Landis 117AVX advanced vector extensions 118BA byte align 119BAL basic assembly language 120BAR base address register 121BBS bulletin board system 122BCC blind carbon copy 123BCD binary coded decimal 124BCH boot console handler 125BCR byte count register 126BCS base configuration space 127BD baud 128BDD binary decision diagram 129BDI bit deinterleave 130BDUF big design up front 131BEDO burst extended data output 132BER basic encoding rules 133BER bit error {rate,ratio} 134BERT boot error record table 135BFD bidirectional forwarding detection 136BFD binary {file,format} descriptor 137BFKL big fscking kernel lock 138BFS breadth-first search 139BFT binary file transfer 140BGA ball grid array 141BGP Border Gateway Protocol 142BGPSEC BGP Security 143BIND Berkeley Internet Name Daemon 144BIOS Basic Input/Output System 145BIOS built-in operating system 146BIST built-in self-test 147BIU bus interface unit 148BKDG BIOS and kernel developer's guide 149BLAS basic linear algebra subprograms 150BLC back light control 151BLOB binary large object 152BM bus master 153BMC baseboard management controller 154BMIC bus master interface controller 155BN boundary neutral 156BNF Backus-Naur form 157BO binary output 158BOF beginning of file 159BOM beginning of message 160BOM byte order mark 161BP base pointer 162BP boot processor 163BPB BIOS parameter block 164BPDU bridge protocol data unit 165BPF Berkeley Packet Filter 166BPI bits per inch 167BPM business process modelling 168BPS bits per second 169BPSK binary phase shift keying 170BQS Berkeley quality software 171BRE basic regular expression 172BS backspace 173BS binary sequence 174BSA basic service area 175BSD Berkeley Software Distribution 176BSDP Boot Service Discovery Protocol 177BSF bit scan forward 178BSOD blue screen of death 179BSP binary space partition 180BSP board support package 181BSP bootstrap processor 182BSR bit scan reverse 183BSS basic service set 184BSS block started by symbol 185BSSID basic service set identifier 186BT BitTorrent 187BT Bluetooth 188BT bit test 189BTC bit test [and] complement 190BTM bus transport mechanism 191BTR bit test [and] reset 192BTS bit test [and] set 193BTS bug tracking system 194BW bandwidth 195BWM block-write mode 196BUAG big ugly ASCII graphic 197CA certificate authority 198CACLS change access control lists 199CAD computer-aided design 200CAM computer assisted manufacturing 201CAM conditional access module 202CAM content addressable memory 203CARP Common Address Redundancy Protocol 204CAS column address strobe 205CAS compare and swap 206CAS computer algebra system 207CASE computer aided software engineering 208CAU control access unit 209CAV constant angular velocity 210CBC cipher block chaining 211CBR constant bit rate 212CC carbon copy 213CCD charge coupled device 214CCI co-channel interferer 215CCNUMA cache-coherent non-uniform memory access 216CCTL command completion time limit 217CD cache disable 218CD compact disc 219CDDA compact disc digital audio 220CDL compiler description language 221CDMA code division multiple access 222CDP Cisco Discovery Protocol 223CDRAM cache dynamic random access memory 224CER canonical encoding rules 225CE customer edge 226CF compact flash 227CFB cipher feedback 228CFG context-free grammar 229CFG control-flow graph 230CFI control-flow integrity sanitizer 231CG control gate 232CGA Color Graphics Adapter 233CGI common gateway interface 234CGN Carrier-Grade NAT 235CHAP Challenge-Handshake Authentication Protocol 236CHFS chip file system 237CHS cylinder/head/sector 238CI continuous integration 239CI {common,component} interface 240CIDR Classless Inter-Domain Routing 241CIF common intermediate format 242CIFS Common Internet File System 243CIL common intermediate language 244CIR carrier-to-interference ratio 245CIS contact image sensor 246CISC complex instruction set {computer,computing} 247CJK Chinese, Japanese, [and] Korean 248CLF common log format 249CLI command line interface 250CLI common language infrastructure 251CLR common language runtime 252CLS common language specification 253CLTT closed loop thermal throttling 254CLUT color look-up table 255CLV constant linear velocity 256CM configuration management 257CMA concert multithread architecture 258CMC chassis management controller 259CMC corrected machine check 260CMS {configuration,content,course} management system 261CMI control {management,method} interface 262CMOS complementary metal-oxide-semiconductor 263CMP chip multi-processing 264CMS content management system 265CMYK cyan magenta yellow black 266CN {common,canonical} name 267CNC computer numerical control 268CNR carrier-to-noise ratio 269COA change of authority 270COF current operating frequency 271COFDM coded orthogonal frequency division multiplexing 272COFF common object file format 273COM component object model 274COM computer on module 275COMA cache-only memory architecture 276CORBA common object request broker architecture 277COS class of service 278COW copy-on-write 279CP continuous pilot 280CPB core performance boost 281CPC central processor complex 282CPC cpu performance counters 283CPE common phase error 284CPE common platform enumeration 285CPER common platform error record 286CPG clock pulse generator 287CPI cycles per instruction 288CPL current privilege level 289CPLD complex programmable logic device 290CPP C preprocessor 291CPS characters per second 292CPS continuation-passing style 293CPT command pass through 294CPU central processing unit 295CR carriage return 296CRC cyclic redundancy check 297CRL carrier recovery loop 298CRLF carriage return line feed 299CRT cathode ray tube 300CRUD create, read, update, and delete 301CS cable select 302CS chip select 303CS code segment 304CS computer science 305CSDL {common,conceptual} schema definition language 306CSI channel state information 307CSI common system interface 308CSMA carrier sense multiple access 309CSMA/CA carrier sense multiple access with collision avoidance 310CSMA/CD carrier sense multiple access with collision detection 311CSP communicating sequential processes 312CSP content security policy 313CSP constrain satisfaction problems 314CSP cryptographic service provider 315CSR control [and] status registers 316CSRG Computer Systems Research Group 317CSS cascading style sheets 318CST common spanning tree 319CSV comma-separated values 320CTF compact c type format 321CTM close to metal 322CTR counter [mode] 323CTS clear to send 324CTS common type system 325CUA common user access 326CUT coordinated universal time 327CV control voltage 328CVE common vulnerabilities and exposures 329CVS Concurrent Versions System 330DA destination address 331DAA distributed application architecture 332DAB digital audio broadcasting 333DAC digital [to] analog converter 334DAC discretionary access control 335DAD duplicate address detection 336DANE DNS-based Authentication of Named Entities 337DAO disk at once 338DAP Directory Access Protocol 339DAT digital audio tape 340DAT dynamic acceleration technology 341DB database 342DBA database administrator 343DBA dynamic bandwidth allocation 344DBB data bus buffer 345DBC design by contract 346DBL dynamic buffer limiting 347DBMS database management system 348DBS database server 349DC direct current 350DCC Direct Client-to-Client 351DCC direct cable connect 352DCD data carrier detect 353DCE data control equipment 354DCE distributed computing environment 355DCIM data center infrastructure management 356DCIM digital camera images 357DCL Digital Command Language 358DCOM distributed component object model 359DCOP Desktop COmmunication Protocol 360DCS data collection systems 361DCT discrete cosine transform 362DCU data cache unit 363DDC display data channel 364DDE dynamic data exchange 365DDI device drivers interface 366DDK device driver kit 367DDL data description language 368DDR double data rate 369DDS direct digital sound 370DDWG Digital Display Working Group 371DE debugging extensions 372DE desktop environment 373DEA data encryption algorithm 374DEC Digital Equipment Corporation 375DEK data encryption key 376DEP data execution prevention 377DER distinguished encoding rules 378DES Data Encryption Standard 379DF don't fragment 380DFA deterministic finite automaton 381DFC data flow control 382DFS depth first search 383DFS distributed file system 384DFSAN Data Flow Sanitizer 385DFT diagnostic function test 386DFT discrete Fourier transform 387DGL data generation language 388DH Diffie-Hellman 389DHCP Dynamic Host Configuration Protocol 390DIA dedicated Internet access 391DIFS distributed inter-frame space 392DIMM dual inline memory module 393DIRT design in real time 394DKI driver/kernel interface 395DL diode logic 396DL discrete logarithm 397DL download 398DLCI data link connection identifier 399DLE data link escape 400DLL dynamic link library 401DLP discrete logarithm problem 402DMA direct memory access 403DMI desktop management interface 404DMS document management system 405DMT discrete multitone modulation 406DMU data management layer 407DNARD Digital network appliance reference design 408DND drag and drop 409DNLC directory name lookup cache 410DNS Domain Name System 411DNSSEC DNS Security Extensions 412DOE distributed object environment 413DOF data over fibre 414DOM document object model 415DOS denial of service 416DOS disk operating system 417DP DisplayPort 418DPC deferred procedure call 419DPCM differential pulse code modulation 420DPD dead peer detection 421DPI deep packet inspection 422DPI dots per inch 423DPL descriptor privilege level 424DPS Display PostScript 425DPST display power savings technology 426DRAAS disaster recovery as a service 427DRAM dynamic random access memory 428DRBG deterministic random bit generator 429DRI direct rendering infrastructure 430DRM digital rights management 431DRRS display refresh rate switching 432DS debug store 433DS differentiated services 434DSA digital signature algorithm 435DSAP destination service access point 436DSB double-sideband modulation 437DSCP differentiated services code point 438DSDT differentiated system descriptor table 439DSF device special file 440DSL dataset and snapshot layer 441DSL digital subscriber line 442DSL domain specific language 443DSLAM digital subscriber line access multiplexer 444DSN delivery status notification 445DSO dynamic shared object 446DSP digital signal processor 447DSSS direct sequence spread spectrum 448DTB device tree blob 449DTC device tree compiler 450DTD document type definition 451DTE data terminal equipment 452DTE dumb terminal emulator 453DTL diode-transistor logic 454DTLS datagram transport layer security 455DTS device tree source 456DTS digital thermal sensor 457DUT device under test 458DVB digital video broadcasting 459DVCS distributed version control system 460DVD digital versatile disc 461DVFS dynamic voltage and frequency scaling 462DVI device independent 463DVI Digital Visual Interface 464DVR digital video recorder 465E-XER extended XML encoding rules 466EABI embedded-application binary interface 467EAI Email Address Internationalization 468EAI Enterprise Application Integration 469EAP Extensible Authentication Protocol 470EAPOL EAP over Lan 471EAV entity-attribute-value model 472EAV ethernet audio/video bridging 473EBCDIC Extended Binary Coded Decimal Interchange Code 474EBDA Extended BIOS Data Area 475EBNF extended backus-naur form 476EBR extended boot record 477EC elliptic curve 478ECC elliptic curve cryptography 479ECC error correction code 480ECDH elliptic curve Diffie-Hellman 481ECDL elliptic curve discrete logarithm 482ECDLP elliptic curve discrete logarithm problem 483ECDSA elliptic curve digital signature algorithm 484ECL emitter-coupled logic 485ECN explicit congestion notification 486ECP enhanced capability port 487ECS enhanced chip set 488ECS extended configuration space 489EDAC error detection and correction 490EDAT enhanced dynamic acceleration technology 491EdDSA Edwards curve digital signature algorithm 492EDGE explicit data graph execution 493EDID extended display identification data 494EDO extended data out 495EDS electronical data sheet 496EDSAC electronic delay storage automatic calculator 497EDVAC electronic discrete variable automatic computer 498EEE energy efficient ethernet 499EEPROM electrically erasable programmable read only memory 500EFI extensible firmware interface 501EFL emitter follower logic 502EFM eight to fourteen modulation 503EFS extent file system 504EGA Enhanced Graphics Adapter 505EGP exterior gateway protocol 506EH extension header 507EIDE enhanced IDE 508EISA extended industry standard architecture 509EINJ error injection table 510ELF executable and linking format 511ELS entry level system 512EMI electro-magnetic interference 513EMP electro-magnetic pulse 514EMR electro-magnetic radiation 515EMACS Editor MACroS 516ENIAC electronic numerical integrator and computer 517EOF end of file 518EOI end of interrupt 519EOIS end of interactive support 520EOL end of life 521EOL end of line 522EOT end of transmission 523EPIC explicitly parallel instruction computing 524EPP enhanced parallel port 525EPRML extended partial response, maximum likelihood 526EPROM erasable programmable read only memory 527ERC error recovery control 528ERD emergency recovery disk 529ERD entity relationship diagram 530ERE extended regular expression 531ERST error record serialization table 532ESAN Efficiency Sanitizer 533ESB enterprise service bus 534ESDI enhanced small disk interface 535ESDRAM enhanced synchronous dynamic random access memory 536ESI enclosure services interface 537ESS electronic switching system 538ESS extended service set 539ESSID extended service set identifier 540EST enhanced speedstep 541ETL extract, transform, load 542EU execution unit 543EULA end user license agreement 544FAT file allocation table 545FBRAM frame buffer random access memory 546FCIF full common intermediate format 547FCL fiber channel loop 548FCS frame check sequence 549FDC floppy disk controller 550FDD floppy disk drive 551FDDI fiber distributed data interface 552FDE full disk encryption 553FDT flattened device tree 554FEA finite element analysis 555FEC forward error correction 556FET field-effect transistor 557FF finite field 558FF form feed 559FFDH finite-field Diffie-Hellman 560FFH functional fixed hardware 561FFI foreign function interface 562FFM focus follows mouse 563FFS Fast File System 564FFS find first set 565FFT fast Fourier transform 566FG floating gate 567FHSS frequency hop spread spectrum 568FID frequency identifier 569FIFO first in, first out 570FILO first in, last out 571FIPS Federal Information Processing Standards 572FIR fast infrared 573FLOPS floating [point] operations per second 574FLOSS free/libre/open source software 575FM frequency modulation 576FMR false match rate 577FOSS free/open source software 578FPGA field programmable gate array 579FPM fast page mode 580FPR floating point register 581FPU floating point unit 582FQDN fully qualified domain name 583FRR false rejection rate 584FRU field replaceable unit 585FS file system 586FSB front side bus 587FSCK file system check 588FSF Free Software Foundation 589FSK frequency shift keying 590FSM finite-state machine 591FTA fault tree analysis 592FTL flash translation layer 593FTP File Transfer Protocol 594FTPS File Transfer Protocol Secure 595FUS fast user switching 596FWH firmware hub 597FWS folding white space 598GAL generic array logic 599GARP generic attribute registration protocol 600GAS generic address structure 601GC garbage collector 602GCM Galois counter mode 603GCR group-coded recording 604GDI Graphics Device Interface 605GDT global descriptor table 606GEM graphics environment manager 607GEM graphics execution manager 608GENA general event notification architecture 609GHC Glasgow Haskell compiler 610GHES generic hardware error source 611GIC generic interrupt controller 612GID group identifier 613GIF graphics interchange format 614GMCH graphics and memory controller hub 615GNU GNU's Not Unix 616GOP graphics output protocol 617GOT global offset table 618GPE general purpose event 619GPF general protection fault 620GPG GNU Privacy Guard 621GPL [GNU] General Public License 622GPR general purpose register 623GPS generalized processor sharing 624GPT GUID partition table 625GPU graphics processing unit 626GR golden ratio 627GRE generic routing encapsulation 628GSI global system interrupt 629GUI graphical user interface 630GUID globally unique identifier 631GVFS git virtual file system 632HA high availability 633HAL hardware abstraction layer 634HAT hashed array tree 635HATEOAS hypermedia as the engine of application state 636HBA host bus adapter 637HCF halt and catch fire 638HCI host controller interface 639HCI human-computer interaction 640HCL hardware compatibility list 641HDCP High-bandwidth Digital Content Protection 642HDD hard disk drive 643HDL hardware description language 644HDMI High-Definition Multimedia Interface 645HDTV high-definition television 646HECI host embedded controller interface 647HEST hardware error source table 648HEVC high efficiency video coding 649HF high frequency 650HFM highest frequency mode 651HFS hierarchical file system 652HID human interface device 653HKP HTTP Keyserver Protocol 654HLL high-level language 655HMA high memory area 656HMI human-machine interface 657HOOD hierarchical object oriented design 658HP Hewlett-Packard 659HPC high performance computing 660HPET high precision event timer 661HSM hardware security module 662HSM hierarchical storage management 663HT hyper-threading 664HTC hardware thermal control 665HTCC high temperature co-fired ceramic 666HTML HyperText Markup Language 667HTT hyper-threading technology 668HTTP Hypertext Transfer Protocol 669HTTPS Hypertext Transfer Protocol Secure 670HVM hardware virtual machine 671HVDS High-Voltage Differential Signaling 672HWASAN Hardware-assisted Address Sanitizer 673HZ Hertz 674I2O intelligent input/output 675IA information assurance 676IAAS infrastructure as a service 677IANA Internet Assigned Numbers Authority 678IBC iterated block cipher 679IBM International Business Machines 680IBPI international blinking pattern interpretation 681IBS instruction based sampling 682IBSS independent basic service set 683IC integrated circuit 684ICA independent computer architecture 685ICACLS integrity control access control lists 686ICB Internet Citizen's Band 687ICE in-circuit emulator 688ICE internal compiler error 689ICH I/O controller hub 690ICMP Internet Control Message Protocol 691ICT information and communications technology 692ICW initialization command word 693IDA Intel dynamic acceleration 694IDCMP Intuition direct communication message port 695IDCT inverse discrete cosine transform 696IDE integrated development environment 697IDE integrated drive electronics 698IDPS intrusion detection [and] prevention system 699IDRP inter-domain routing protocol 700IDS intrusion detection system 701IDT interrupt descriptor table 702IE Internet Explorer 703IEC International Electrotechnical Commission 704IEEE Institute of Electrical and Electronics Engineers 705IESG Internet Engineering Steering Group 706IETF Internet Engineering Task Force 707IF intermediate frequency 708IFCM isochronous flow control mode 709IFF Interchange File Format 710IFS internal field separator 711IGD Internet gateway device 712IGMP Internet Group Management Protocol 713IGP interior gateway protocol 714IHV independent hardware vendor 715IKE Internet key exchange 716ILM internal loopback mode 717ILOM integrated lights-out management 718ILP instruction level parallelism 719IM instant messaging 720IMAP Internet Message Access Protocol 721IMC integrated memory controller 722IMCR interrupt mode configuration register 723IMR interrupt mask register 724IMS information management system 725IMSI international mobile subscriber identity 726INCITS InterNational Committee for Information Technology Standards 727IO input/output 728IOCTL input/output control 729IOM input/output managers 730IOMMU input/output memory management unit 731IOT Internet of Things 732IP Internet Protocol 733IP intellectual property 734IPC instructions per cycle 735IPC interprocess communication 736IPCF interprocess communication facility 737IPE integrated programming environment 738IPI intelligent peripheral interface 739IPI interprocessor interrupt 740IPL Initial Program Load 741IPL Interrupt Priority Level 742IPMB Intelligent Platform Management Bus 743IPMI Intelligent Platform Management Interface 744IPNG Internet Protocol, Next Generation 745IPS in-plane switching 746IPS intrusion prevention system 747IPSEC Internet Protocol Security 748IRC Internet Relay Chat 749IRDA infrared data association 750IRDP ICMP Router Discovery Protocol 751IRQ interrupt request 752IRQL interrupt request level 753IRR interrupt request register 754IRTF Internet Research Task Force 755IS information system 756ISA industry standard architecture 757ISA instruction set architecture 758ISE instant secure erase 759ISDN integrated services digital network 760ISI inter-symbol interference 761ISL initial system load 762ISM industrial, scientific, [and] medical 763ISN initial serial number 764ISO International Standards Organization 765ISOC Internet Society 766ISP Internet service provider 767ISR in-service register 768ISR interrupt service routine 769IST internal spanning tree 770IST interrupt stack table 771ISV independent software vendor 772IT information technology 773ITB Intel Turbo Boost 774ITIL information technology infrastructure library 775ITP in-target probe 776ITSM IT service management 777IV initialization vector 778IVT interrupt vector table 779JBOD just a bunch of disks 780JCL Job Control Language 781JFET junction [gate] field-effect transistor 782JIT just in time 783JPEG Joint Photographic Experts Group 784JRE Java Runtime Environment 785JSON JavaScript Object Notation 786JTAG joint test action group 787KASLR kernel address space layout randomization 788KB keyboard 789KB kilobyte 790KBD keyboard 791KBD kilobaud 792KCS keyboard controller style 793KLOC thousand lines of code 794KMS kernel-mode setting 795KPI kernel programming interface 796KVA kernel virtual address 797KVM kernel virtual machine 798KVM kernel virtual memory 799KVM keyboard, video, [and] mouse 800L2CAP link layer control and adaptation protocol 801LAMP Linux Apache MySQL {Perl,PHP,Python} 802LAN local area network 803LAPIC local advanced programmable interrupt controller 804LAR load access rights 805LBA logical block addressing 806LBNF labeled backus-naur form 807LBS location-based service 808LCD liquid crystal display 809LCP link control protocol 810LDA local delivery agent 811LDAP Lightweight Directory Access Protocol 812LDR light-dependent resistor 813LDT local descriptor table 814LE logical extent 815LED light emitting diode 816LELL low energy link layer 817LER label edge router 818LF line feed 819LF low frequency 820LFM lowest frequency mode 821LFN long file names 822LFO low-frequency oscillation 823LFS log-structured file system 824LFU least frequently used 825LHP loop heat pipe 826LIF logical interchange format 827LIFO last in, first out 828LILO LInux LOader 829LILO last in, last out 830LINT local interrupt 831LIR local Internet registry 832LISP LISt Processor 833LISP Locator/ID Separation Protocol 834LKM {Linux,loadable} kernel module 835LKML Linux kernel mailing list 836LL load linked 837LL/SC load linked/store conditional 838LLC logical link control 839LLD low-level design 840LLDD low-level design document 841LLDP link layer discovery protocol 842LLF low level format 843LLMNR link-local multicast name resolution 844LLVM Low Level Virtual Machine 845LM long mode 846LMCE local machine check exception 847LMI local management interface 848LMM link management mode 849LMP link management protocol 850LNO loop nest optimization 851LOC lines of code 852LOM lights-out management 853LPE Linux performance events 854LPC low pin count 855LPS local positioning system 856LRC longitudinal redundancy check 857LRM left-to-right mark 858LRO left-to-right override 859LRU least recently used 860LS link state 861LSAN Leak Sanitizer 862LSB Linux standards base 863LSB least significant {bit,byte} 864LSI large scale integration 865LSL load segment limit 866LSM log structured merge 867LSN Large Scale NAT 868LSN log sequence number 869LSR label switch router 870LTCC low temperature co-fired ceramic 871LTO linear tape-open 872LTO link time optimization 873LTR left to right 874LTR load task register 875LTR letter(-sized paper) 876LTS long term support 877LUA Lua Uppercase Accident 878LUN logical unit number 879LV logical volume 880LVM logical volume management 881LVT local vector table 882LVDS Low-Voltage Differential Signaling 883LWP light-weight process 884LZSS Lempel Ziv Storer Szymanski 885LZW Lempel Ziv Welch 886MAB MAC authentication bypass 887MAC mandatory access control 888MAC {media,medium} access control 889MAC message authentication {check,code} 890MADT multiple APIC descriptor table 891MAMR microwave-assisted magnetic recording 892MB megabyte 893MBA multi-boot agent 894MBR master boot record 895MBS megabits per second 896MC memory controller 897MCA machine check architecture 898MCA MicroChannel architecture 899MCC multiversion concurrency control 900MCE machine check exception 901MCGA Multi-Color Graphics Array 902MCH memory controller hub 903MCLAG multi-chassis link aggregation 904MCM multi-chip module 905MCQ memory controlled queue 906MD machine-dependent 907MD-SAL model-driven service abstraction layer 908MDA mail delivery agent 909MDA Monochrome Display Adapter 910MDC Management Data Clock 911MDI Medium Dependent Interface 912MDI-X Medium Dependent Interface Crossover 913MDIO Management Data Input/Output 914MDMX MIPS Digital Media eXtension 915MDRAM multibank dynamic random access memory 916MESI modified, exclusive, shared, invalid 917MFC merge from current 918MFC Microsoft Foundation Classes 919MFM modified frequency modulation 920MFU most frequently used 921MGCP media gateway control protocol 922MHU message handling unit 923MI machine-independent 924MI machine interface 925MIB management information base 926MIC message integrity {check,code} 927MID mobile Internet device 928MIDI musical instrument digital interface 929MIF management information format 930MII media independent interface 931MIM man in the middle 932MIMD multiple instruction, multiple data 933MIME Multipurpose Internet Mail Extensions 934MIMO multiple input multiple output 935MIPS million instructions per second 936MIPS Microprocessor without Interlocked Pipeline Stages 937MISD multiple instruction, single data 938MIT Massachusetts Institute of Technology 939MITM man in the middle 940ML machine language 941ML machine learning 942ML mailing list 943ML markup language 944ML maximum likelihood 945MLC multi-level cell 946MLD multicast listener discovery 947MLHP micro loop heat pipe 948MMF multi-mode fiber 949MMIC monolithic microwave integrated circuit 950MMIO memory mapped input/output 951MMORPG massive multiplayer online role playing game 952MMRP multiple MAC registration protocol 953MMU memory management unit 954MMX matrix math extension 955MMX multimedia extension 956MMX multiple math extension 957MO magneto-optical 958MOESI modified, owned, exclusive, shared, invalid 959MOF maximum operating frequency 960MOSFET metal-oxide-semiconductor field-effect transistor 961MOSI modified, owned, shared, invalid 962MP multi-platform 963MP multiplayer 964MP {multiprocessing,multiprocessor} 965MPEG moving picture experts group 966MPI message passing interface 967MPLS Multiprotocol Label Switching 968MPP massively parallel processor 969MPS memory pool system 970MPS multiprocessor specification 971MQTT Message Queuing Telemetry Transport 972MR modem ready 973MRO method resolution order 974MRP multiple registration protocol 975MRU most recently used 976MS Microsoft 977MSAN Memory Sanitizer 978MSB most significant {bit,byte} 979MSC message sequence chart 980MSE mean square error 981MSF minutes seconds frames 982MSI message signaled interrupt 983MSI modified, shared, invalid 984MSR {machine state,model-specific} register 985MSS maximum segment size 986MSTP Multiple Spanning Tree Protocol 987MT machine translation 988MTA mail transfer agent 989MTBF mean time between failures 990MTP media transfer protocol 991MTRR memory type range register 992MTTF mean time to failure 993MTU maximum transmission unit 994MUA mail user agent 995MUD multi-user domain 996MVCC multiversion concurrency control 997MVR multicast VLAN registration 998MVRP multiple VLAN registration protocol 999MWE module width encoding 1000MX mail exchange 1001NACK negative acknowledgement 1002NAK negative acknowledgement 1003NAN not a number 1004NAPT Network Address Port Translation 1005NAS network attached storage 1006NAT network address translation 1007NAV network allocation vector 1008NC numerical control 1009NC-SI network controller sideband interface 1010NCO numerically-controlled oscillator 1011NCP Network Control Protocol 1012NCSI network connectivity status indicator 1013NCQ native command queuing 1014ND neighbor discovery 1015NDFA nondeterministic finite automaton 1016NDIS network driver interface specification 1017NE numeric error 1018NEWS Network extensible Window System 1019NFA nondeterministic finite automaton 1020NFC near-field communication 1021NFCI no functional change intended 1022NFS network file system 1023NFV network function virtualization 1024NIA next instruction address 1025NIC network information center 1026NIC network interface card 1027NIDS network intrusion detection system 1028NIP network interface protocol 1029NIPS network intrusion prevention system 1030NIS network information service 1031NIST National Institute of Standards and Technology 1032NLS native language support 1033NMI non-maskable interrupt 1034NNTP Network News Transfer Protocol 1035NOC network operations center 1036NOP no operation 1037NOS network operating system 1038NP nondeterministic polynomial time 1039NRND not recommended for new designs 1040NRZ non-return to zero 1041NSA nation-state adversary 1042NSA no such agency 1043NSA National Security Agency 1044NTM non-deterministic Turing machine 1045NTP Network Time Protocol 1046NUMA non-uniform memory access 1047NVMM NetBSD Virtual Machine Monitor 1048NVMM non-volatile main memory 1049NVRAM non-volatile random access memory 1050NW not write-through 1051NX no execute 1052OAEP optimal asymmetric encryption padding 1053OAM operations, administration, and {management,maintenance} 1054OBO off by one 1055OBOE off by one error 1056OCL object constraint language 1057OCR optical character recognition 1058ODE offline device environment 1059ODI open data-link interface 1060ODM object data manager 1061ODCM on-demand clock modulation 1062ODT on-die termination 1063OEM original equipment manufacturer 1064OFB output feedback 1065OFDM orthogonal frequency division multiplexing 1066OFET organic field-effect transistor 1067OLAP online analytical processing 1068OLE object linking and embedding 1069OLTP online transaction processing 1070ONFI open nand flash interface 1071OO OpenOffice 1072OO object oriented 1073OOB out of band 1074OOE out of order execution 1075OOM out of memory 1076OOO OpenOffice.org 1077OOP object oriented programming 1078OOPS object oriented programming systems 1079OOSE object oriented software engineering 1080OPM operations per minute 1081OPS operations per second 1082OQL Object Query Language 1083ORB object request broker 1084ORM object-relational mapping 1085OS operating system 1086OSD open source definition 1087OSF open software foundation 1088OSI Open Source Initiative 1089OSI open systems interconnection 1090OSPF open shortest path first 1091OSPM OS power management 1092OSS open sound system 1093OSS open source software 1094OSVW operating system visible workarounds 1095OTP one time password 1096OTP open telecom platform 1097OU organizational unit 1098OUI organizationally unique identifier 1099OWL Web Ontology Language 1100P2P PCI to PCI 1101P2P peer to peer 1102PA phase accumulator 1103PA physical address 1104PAAS platform as a service 1105PAC phase-amplitude converter 1106PAE physical address extension 1107PAGP port aggregation protocol 1108PAL phase alternating line 1109PAL programmable array logic 1110PAM pluggable authentication modules 1111PAM pulse amplitude modulation 1112PAP password authentication protocol 1113PAT page attribute table 1114PAT port address translation 1115PATA parallel ATA 1116PAX portable archive exchange 1117PBE pending break encoding 1118PBE programming by example 1119PC personal computer 1120PC program counter 1121PCB printed circuit board 1122PCB process control block 1123PCB Protocol Control Block 1124PCC Portable C Compiler 1125PCD page-level cache disable 1126PCE path computation element 1127PCE performance-monitor counter enable 1128PCEP Path Computation Element Protocol 1129PCH platform controller hub 1130PCI peripheral component interconnect 1131PCM phase change memory 1132PCM pulse code modulation 1133PCMCIA Personal Computer Memory Card International Association 1134PCP Port Control Protocol 1135PD public domain 1136PDA personal digital assistant 1137PDA pushdown automaton 1138PDAG propositional directed acyclic graph 1139PDB power distribution board 1140PDF portable document format 1141PDM pulse-duration modulation 1142PDN pull-down network 1143PDP page {descriptor,directory} page 1144PDS product data sheet 1145PDU protocol data unit 1146PE protection enable 1147PE provider edge 1148PEAP Protected EAP 1149PECI platform environment control interface 1150PEP protocol extension protocol 1151PER packed encoding rules 1152PFS perfect forward secrecy 1153PGAS partitioned global address space 1154PGE page global enable 1155PGP Pretty Good Privacy 1156PHB PCI host bridge 1157PHP PHP: Hypertext Preprocessor 1158PIC performance instrumentation counters 1159PIC position independent code 1160PIC programmable interrupt controller 1161PICNIC problem in chair, not in computer 1162PID process id 1163PIE position independent executable 1164PIL Priority Interrupt Level 1165PIM personal information manager 1166PIM platform-independent model 1167PIO programmed input/output 1168PIPT physically indexed, physically tagged 1169PIQ prefetch input queue 1170PIT programmable interrupt timer 1171PIV personal identity verification 1172PIX Private Internet eXchange 1173PKCS public-key cryptography standards 1174PKI public key infrastructure 1175PLC programmable logic controller 1176PLD programmable logic device 1177PLL phase locked loop 1178PLRU pseudo LRU 1179PLTM package level thermal management 1180PM power management 1181PM {phase,pulse} modulation 1182PMC performance monitoring counters 1183PME power management event 1184PMEG page map entry group 1185PMI performance monitoring infrastructure 1186PMI platform management interrupt 1187PMIC power management integrated circut 1188PMIO port-mapped input/output 1189PMT photo-multiplier tube 1190PMU performance monitoring units 1191PMU power management unit 1192PNG portable network graphics 1193PNP plug and play 1194POE power over ethernet 1195POF probability of failure 1196POP Post Office Protocol 1197POP power on password 1198POR plan of record 1199POSIX Portable Operating System Interface [for Unix] 1200POST power on self test 1201POTS plain old telephone system 1202POWER Performance Optimization With Enhanced RISC 1203POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1204PP pair programming 1205PPB PCI [to] PCI bridge 1206PPC PowerPC 1207PPC Power Performance Computing 1208PPI pixels per inch 1209PPM pages per minute 1210PPP Point-to-Point Protocol 1211PPPOA Point-to-Point Protocol over ATM 1212PPPOE Point-to-Point Protocol over Ethernet 1213PPR processor programming reference 1214PPU physics processing unit 1215PRAM Parameter RAM 1216PRBS pseudorandom bit sequence 1217PRG pseudorandom generator 1218PRF pseudorandom function [family] 1219PRML partial response, maximum likelihood 1220PRN pseudorandom {noise,number} 1221PRNG pseudorandom number generator 1222PROM programmable read only memory 1223PRP pseudorandom permutation 1224PRU Programmable Realtime Unit 1225PS PostScript 1226PSD power spectral density 1227PSE page size extensions 1228PSK phase shift keying 1229PSK pre-shared key 1230PSTN public switched telephone network 1231PSW program status word 1232PTE page table entry 1233PTLA pseudo top level aggregator 1234PTP page table page 1235PTV perceived target value 1236PU processing unit 1237PUC personal unblocking code 1238PUN physical unit number 1239PV physical volume 1240PVC permanent virtual circuit 1241PVG physical volume group 1242PVI protected-mode virtual interrupt 1243PVRST Per-VLAN rapid spanning tree 1244PVST Per-VLAN Spanning Tree 1245PWM pulse width modulation 1246PXE preboot execution environment 1247QA quality assurance 1248QAM quadrature amplitude modulation 1249QAM quality assurance management 1250QBE query by example 1251QC quality control 1252QDI quasi delay insensitive 1253QCIF quarter common intermediate format 1254QOS quality of service 1255QVL qualified vendor list 1256R/O read only 1257R/W read/write 1258RA receiver address 1259RA remote assistance 1260RA resource affinity 1261RA router advertisement 1262RAD rapid application development 1263RADIUS remote authentication dial-in user service 1264RAID redundant array of {independent,inexpensive} disks 1265RAM random access memory 1266RAS reliability, availability and serviceability 1267RAS remote access service 1268RAS restartable atomic sequence 1269RAS row address strobe 1270RBF radial basis function 1271RBNF routing backus-naur form 1272RBT red-black tree 1273RC release candidate 1274RC remote control 1275RC run commands 1276RCS Revision Control System 1277RCS revision control system 1278RCU read, copy, update 1279RDB Rigid Disk Block 1280RDBMS relational database management system 1281RDF Resource Description Framework 1282RDM relational data model 1283RDMA remote direct memory access 1284RDRAM Rambus DRAM 1285RE regular expression 1286REPL read, evaluate, print, loop 1287REST representational state transfer 1288RF radio frequency 1289RFI radio frequency interference 1290RFO request for ownership 1291RFU reserved for future use 1292RGB red green blue 1293RGBA red green blue alpha 1294RGMII reduced gigabit media independent interface 1295RH read hit 1296RHEL Red Hat Enterprise Linux 1297RHL Red Hat Linux 1298RIB routing information base 1299RIFF Resource Interchange File Format 1300RIP Raster Image Processor 1301RIP Routing Information Protocol 1302RIR regional Internet registry 1303RISC reduced instruction set {computer,computing} 1304RKM ROM Kernel Manual 1305RLE run length encoding 1306RLL run length limited 1307RLO right-to-left override 1308RM read miss 1309RMCP Remote Management Control Protocol 1310RMI remote method invocation 1311RMO Relaxed Memory Ordering 1312RMPM rapid memory power management 1313RMS root mean square 1314RMW read, modify, write 1315RNG random number generator 1316ROM read only memory 1317RPC remote procedure call 1318RPKI resource PKI 1319RPL requested privilege level 1320RPM revolutions per minute 1321RPN reverse Polish notation 1322RPVST Rapid Per-VLAN Spanning Tree 1323RR random replacement 1324RR round robin 1325RS relay station 1326RSA Rivest, Shamir, [and] Adleman 1327RSIP Realm Specific IP 1328RSN Robust Secure Network 1329RSS really simple syndication 1330RSS residual sum of squares 1331RSTP Rapid Spanning Tree Protocol 1332RT real time 1333RTC real time clock 1334RTC real time computing 1335RTF rich text format 1336RTL register transfer language 1337RTL resistor-transistor logic 1338RTL right to left 1339RTOS real time operating system 1340RTS request to send 1341RTT round trip time 1342RUP rational unified process 1343RW Rabin-Williams 1344RWM read-write memory 1345RX {receive,receiver} 1346S/PDIF Sony/Philips Digital Interface Format 1347SA security advisory 1348SA security association 1349SA source address 1350SA structured analysis 1351SAAS software as a service 1352SABRE Semi-automated business research environment 1353SACD super audio compact disc 1354SAD security association database 1355SAF-TE SCSI accessed fault-tolerant enclosure 1356SAGE Semi-automated ground environment 1357SAL {service,system} abstraction layer 1358SAM serial access memory 1359SAM sum addressed memory 1360SAML security assertion markup language 1361SAN storage area network 1362SAP service access point 1363SAPIC streamlined advanced programmable interrupt controller 1364SASD structured analysis, structured design 1365SASI Shugart Associates System Interface 1366SASL simple authentication [and] security layer 1367SATA serial advanced technology attachment 1368SAX simple API for XML 1369SB sound blaster 1370SBSA server base system architecture 1371SBU standard build unit 1372SC store conditional 1373SCA source code analyzer 1374SCADA supervisory control and data acquisition 1375SCC single chip cloud 1376SCC source code control 1377SCCP skinny call control protocol 1378SCCS Source Code Control System 1379SCI scalable coherent interface 1380SCI system control interrupt 1381SCM software configuration management 1382SCM source code management 1383SCM storage-class memory 1384SCO synchronous connection orientated 1385SCP secure copy 1386SCP system control processor 1387SCPI system control and power interface 1388SCSI Small Computer System Interface 1389SCTP Stream Control Transmission Protocol 1390SDDC software defined data center 1391SDEI software delegated exception interface 1392SDI symbol deinterleave 1393SDK software development kit 1394SDL Simple Declarative Language 1395SDL Simple Direct-media Layer 1396SDLC {software,system,systems} development life cycle 1397SDN software defined networking 1398SDP Session Description Protocol 1399SDRAM synchronous dynamic random access memory 1400SDS software defined storage 1401SDT syntax-directed translation 1402SEA synchronous external abort 1403SEGV segmentation violation 1404SED self-encrypting drive 1405SED stream editor 1406SEMB serial ATA enclosure management bridge 1407SEO search engine optimization 1408SES SCSI enclosure services 1409SFC sequential function chart 1410SFI simple firmware interface 1411SFI software fault isolation 1412SFTP SSH File Transfer Protocol 1413SFTP Serial File Transfer Protocol 1414SFTP Simple File Transfer Protocol 1415SGMII serial gigabit media independent interface 1416SGPIO serial general purpose input/output 1417SGRAM synchronous graphics random access memory 1418SHA secure hash algorithm 1419SIDH supersingular isogeny Diffie-Hellman 1420SIEM security information and event management 1421SIF source input format 1422SIFS short inter-frame space 1423SIM subscriber identity module 1424SIMD single instruction, multiple data 1425SIMM single inline memory module 1426SIP Session Initiation Protocol 1427SIR signal-to-interference ratio 1428SIR slow infrared 1429SISD single instruction, single data 1430SLAAC stateless address auto-configuration 1431SLC single-level cell 1432SLDRAM synchronous-link dynamic random access memory 1433SLED single large expensive disk 1434SLI scalable link interface 1435SLI scan-line interleave 1436SLIC system license internal code 1437SLOC source lines of code 1438SLRU segmented LRU 1439SMA smart memory access 1440SMAF system management action field 1441SMAP Simple Mail Access Protocol 1442SMAP supervisor mode access prevention 1443SMART self-monitoring analysis and reporting technology 1444SMB Server Message Block 1445SMB system management bus 1446SMBIOS System Management BIOS 1447SMC system management controller 1448SMD storage module device 1449SMEP supervisor mode execution protection 1450SMF single mode fiber 1451SMI structure of management information 1452SMI system management interrupt 1453SMM system management mode 1454SMP serial management protocol 1455SMP symmetric multiprocessing 1456SMT simultaneous multithreading 1457SMTP Simple Mail Transfer Protocol 1458SMU system management unit 1459SNA systems network architecture 1460SNAP Sub-Network Access Protocol 1461SNIA Storage Networking Industry Association 1462SNMP Simple Network Management Protocol 1463SNR signal-to-noise ratio 1464SOA service oriented architecture 1465SOAP Simple Object Access Protocol 1466SOC system on chip 1467SOF start of frame 1468SOH start of header 1469SOHO small office/home office 1470SOL serial over LAN 1471SOM system on module 1472SP service pack 1473SP stack pointer 1474SPA storage pool allocator 1475SPAN switched port analyzer 1476SPARC scalable processor architecture 1477SPARQL SPARQL Protocol and RDF Query Language 1478SPD security policy database 1479SPD serial presence detect 1480SPDIF Sony/Philips digital interface format 1481SPI serial peripheral interface 1482SPI stateful packet inspection 1483SPL system interrupt priority level 1484SPL spinlock 1485SPMD single process, multiple data 1486SPR special purpose register 1487SPT sectors per track 1488SQA software quality assurance 1489SQCIF sub quarter common intermediate format 1490SQL Structured Query Language 1491SRAM static random access memory 1492SRC sample rate conversion 1493SRP SCSI RDMA protocol 1494SRR shaped round robin 1495SS self-snoop 1496SS stack segment 1497SSA static single assignment 1498SSAP source service access point 1499SSB single-sideband modulation 1500SSC spread spectrum clock 1501SSD solid state drive 1502SSE streaming SIMD extensions 1503SSFDC solid state floppy disc card 1504SSH secure shell 1505SSI server side includes 1506SSID service set identifier 1507SSL secure sockets layer 1508SSP stack smashing protection 1509STC software thermal control 1510STD state transition diagram 1511STOMP Streaming Text Oriented Messaging Protocol 1512STP Spanning Tree Protocol 1513STP shielded twisted pair 1514STRG spanning tree root guard 1515SUN Stanford University Network 1516SUS Single Unix Specification 1517SUT system under test 1518SVC switched virtual circuit 1519SVG scalable vector graphics 1520SVGA Super Video Graphics Array 1521SVI {switch,switched} virtual interface 1522SVM secure virtual machine 1523SVM support vector machine 1524SVR System V Release 1525SVS Separate Virtual Space 1526SWF Shockwave Flash 1527SWIG simplified wrapper [and] interface generator 1528SYR symbol timing recovery 1529TA test assertion 1530TA transmitter address 1531TACACS terminal access controller access-control system 1532TAI international atomic time 1533TAO track at once 1534TAOCP The Art of Computer Programming 1535TAP Test Anything Protocol 1536TAS test and set 1537TB terabyte 1538TBNF transitional backus-naur form 1539TCB trace capture buffer 1540TCB trusted computing base 1541TCC thermal control circuit 1542TCL tool command language 1543TCP Transmission Control Protocol 1544TCQ tagged command queueing 1545TDC time [to] digital converter 1546TDD test-driven development 1547TDD time division duplex 1548TDM time division multiplexing 1549TDMA time division multiple access 1550TDOA time difference of arrival 1551TDP thermal design {point,power} 1552TDR time-domain reflectometry 1553TECO Text Editor and Corrector 1554TFT thin film transistor 1555TFTP Trivial File Transfer Protocol 1556TIAS try it and see 1557TIFF tagged image file format 1558TITS try it to see 1559TK temporal key 1560TKIP Temporal Key Integrity Protocol 1561TLA top level aggregator 1562TLB translation lookaside buffer 1563TLD top level domain 1564TLER time-limited error recovery 1565TLI transport layer interface 1566TLS thread local storage 1567TLS transport layer security 1568TM Turing machine 1569TM thermal monitor 1570TMG transmogrifier 1571TMDS transition minimized differential signaling 1572TMO timeout 1573TOD time of day 1574TOS terms of service 1575TOS trusted operating system 1576TOS type of service 1577TP transaction processing 1578TPI tracks per inch 1579TPM transactions per minute 1580TPM trusted platform module 1581TPR task priority register 1582TPS transactions per second 1583TPS transmission parameters signaling 1584TR task register 1585TR token ring 1586TRL timing recovery loop 1587TRNG true random number generator 1588TS terminal services 1589TS time series 1590TS time stamp 1591TS transport stream 1592TSAN Thread Sanitizer 1593TSC time stamp counter 1594TSD time stamp disable 1595TSDB time series database 1596TSL test, set, lock 1597TSO time sharing option 1598TSO Total Store Ordering 1599TSP Time-Stamp Protocol 1600TSP Tunnel Setup Protocol 1601TSP time synchronization protocol 1602TSP traveling salesman problem 1603TSS task state segment 1604TTL time to live 1605TTL transistor-transistor logic 1606TTM translation table maps 1607TTY teletype 1608TUI {terminal,text-based,textual} user interface 1609TX {transmit out,transmitter} 1610TXG transaction group 1611TZ time zone 1612UAC user {access,account} control 1613UAF use-after-free 1614UART universal asynchronous receiver/transmitter 1615UAT user acceptance testing 1616UB undefined behavior 1617UBSAN Undefined Behavior Sanitizer 1618UC uncacheable 1619UCS uniform-cost search 1620UCS unified computing system 1621UCS universal coded character set 1622UDI uniform driver interface 1623UDMA ultra DMA 1624UDO ultra density optical 1625UDP User Datagram Protocol 1626UEFI unified extensible firmware interface 1627UFS Unix File System 1628UGA universal graphics adapter 1629UI unit interval 1630UI user interface 1631UICC universal integrated circuit card 1632UID unique identifier 1633UID user identifier 1634UL upload 1635UMA uniform memory access 1636UMA upper memory area 1637UMB upper memory block 1638UML unified modeling language 1639UMPC ultra-mobile PC 1640UPNP universal plug and play 1641UPS uninterruptible power supply 1642URI uniform resource identifier 1643URL uniform resource locator 1644URN uniform resource name 1645USART universal synchronous/asynchronous receiver/transmitter 1646USB universal serial bus 1647USWC uncacheable speculative write combining 1648UT unit test 1649UTC coordinated universal time 1650UTF unicode transformation formats 1651UTP unshielded twisted pair 1652UUCP Unix-to-Unix Copy Protocol 1653UUID universally unique identifier 1654UUOC useless use of cat 1655UUT unit under test 1656UX user experience 1657VA vertical alignment 1658VA virtual address 1659VA volt-ampere 1660VAX virtual address extension 1661VB Visual Basic 1662VCA variable-gain amplifier 1663VCC common collector voltage 1664VCCP virtual chassis control protocol 1665VCF voltage-controlled filter 1666VCM virtual channel memory 1667VCO voltage-controlled oscillator 1668VCP virtual chassis port 1669VCS version control system 1670VDPAU Video Decode and Presentation API for Unix 1671VES virtual execution system 1672VESA Video Electronics Standards Association 1673VFO variable-frequency oscillator 1674VFS virtual file system 1675VG volume group 1676VGA Video Graphics Array 1677VHDCI very high density cable interconnect 1678VID {VLAN,voltage level} identifier 1679VIM Vi IMproved 1680VIPT virtually indexed, physically tagged 1681VIVT virtually indexed, virtually tagged 1682VLAN virtual local area network 1683VLD variable-length decoding 1684VLIW very long instruction word 1685VLSI very large scale integration 1686VLSM variable length subnet mask 1687VM virtual {machine,memory} 1688VME virtual mode extension 1689VMX vector multimedia extensions 1690VMX virtual machine extensions 1691VOD video on demand 1692VPD vital product data 1693VPN virtual private network 1694VPWS virtual private wire service 1695VR virtual reality 1696VRAM video random access memory 1697VRF virtual routing and forwarding 1698VRM voltage regulator module 1699VROC Virtual RAID On CPU 1700VRRP Virtual Router Redundancy Protocol 1701VSTP VLAN Spanning Tree Protocol 1702VTP VLAN Trunking Protocol 1703VXFS Veritas file sytem 1704VXVM Veritas volume manager 1705W watt 1706W3C World Wide Web Consortium 1707WAFL write anywhere file layout 1708WAMP Web Application Messaging Protocol 1709WAN wide area network 1710WAP Wireless Application Protocol 1711WAP wireless access point 1712WDM Windows Driver Model 1713WDDM Windows Display Driver Model 1714WDT watchdog timer 1715WEP Wired Equivalent Privacy 1716WFI wait for interrupt 1717WFQ weighted fair queuing 1718WH write hit 1719WHEA Windows hardware error architecture 1720WIFI wireless fidelity 1721WLAN wireless local area network 1722WM write miss 1723WMI Windows Management Instrumentation 1724WOL Wake-on-LAN 1725WOM Wake-on-Modem 1726WOR Wake-on-Ring 1727WORM write once read many 1728WP WordPerfect 1729WP word processor 1730WP write protect 1731WPA Wi-Fi Protected Access 1732WPA2 Wi-Fi Protected Access II 1733WPAD web proxy auto-discovery protocol 1734WPS Wi-Fi Protected Setup 1735WRAM window random access memory 1736WS web services 1737WTC write through caching 1738WTD weighted tail drop 1739WWAN wireless wide area network 1740WWW world wide web 1741WYSIAYG what you see is all you get 1742WYSIWYG what you see is what you get 1743XBAR crossbar 1744XDMCP X Display Manager control protocol 1745XER XML encoding rules 1746XGA Extended Graphics Array 1747XHR XMLHttpRequest 1748XIP execute in place 1749XML Extensible Markup Language 1750XNA XNA's not acronymed 1751XNS Xerox network systems 1752XOR exclusive or 1753XP extreme programming 1754XSI X/Open System Interface 1755XSL extensible stylesheet language 1756XSLT extensible stylesheet language transformations 1757XSS cross site scripting 1758XT extended technology 1759XTACACS extended terminal access controller access-control system 1760XTI X/Open transport interface 1761XUL XML user interface language 1762YACC yet another compiler compiler 1763YAML YAML ain't markup language 1764YANG yet another next generation 1765YAWPFAPR you are welcome; please file a problem report 1766YP Yellow Pages 1767YTD year to date 1768ZAP ZFS attribute processor 1769ZBR zone bit recording 1770ZFOD zero-filled on demand 1771ZFS zettabyte file system 1772ZIF zero insertion force 1773ZIFS zero insertion force socket 1774ZIL ZFS intent log 1775ZMA zone multicast address 1776ZOI zero one infinity 1777ZOI zone of influence 1778ZPL ZFS Posix layer 1779ZVOL ZFS Volume 1780