acronyms.comp revision 1.274
1$NetBSD: acronyms.comp,v 1.274 2019/07/02 15:46:06 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 26ADO active data objects 27ADP automatic data processing 28ADPCM adaptive differential pulse code modulation 29ADS alternate data stream 30ADSL asymmetric digital subscriber line 31ADT abstract data type 32AER advanced error reporting 33AES Advanced Encryption Standard 34AFP Apple Filing Protocol 35AFS Andrew File System 36AGC automatic gain control 37AGP accelerated graphics port 38AI analog input 39AI artificial intelligence 40AL access list 41AL active link 42ALE address latch enable 43ALS ambient light sensor 44ALSA advanced Linux sound architecture 45ALU arithmetic and logical unit 46ALUA asymmetric logical unit access 47AM access method 48AM alignment mask 49AM amplitude modulation 50AMD Advanced Micro Devices Inc 51AMDD Agile model-driven development 52AMI alternate mark inversion 53AMP asymmetric multiprocessing 54AMQP advanced message queuing protocol 55AMT active management technology 56AN Arabic number 57ANR application not responding 58ANSI American National Standards Institute 59AO analog output 60AOC add-on card 61AOL Alert-on-LAN 62AOS add or subtract 63AP access point 64AP application processor 65APFS Apple file system 66API application programming interface 67APEI ACPI platform error interface 68APIC advanced programmable interrupt controller 69APIPA automatic private IP addressing 70APM advanced power management 71APM application performance management 72APU accelerated processing unit 73APT advanced persistent threat 74AQM active queue management 75ARAT always running APIC timer 76ARC adaptive replacement cache 77ARC Advanced RISC Computing 78ARC automatic reference counting 79ARM Advanced RISC Machines 80ARP Address Resolution Protocol 81ARPA Advanced Research Projects Agency 82ARQ automatic repeat request 83ARR address range register 84ARU audio response unit 85AS autonomous system 86ASA Adaptive Security Appliance 87ASAN Address Sanitizer 88ASC advanced smart cache 89ASCII American Standard Code for Information Interchange 90ASD agile software development 91ASE advanced software environment 92ASF alert standard format 93ASIC application-specific integrated circuit 94ASK amplitude shift keying 95ASLR address space layout randomization 96ASN autonomous system number 97ASP active server pages 98ASP auxiliary storage pool 99ASPM active state power management 100ASQ automated software quality 101ASR address space register 102ASR Apple software restore 103AST abstract syntax tree 104AST asynchronous system trap 105AT access time 106AT advanced technology 107ATA advanced technology attachment 108ATAPI advanced technology attachment packet interface 109ATC address translation cache 110ATM asynchronous transfer mode 111ATX advanced technology extended 112AV anti virus 113AVB audio video bridging 114AVL Adelson-Velsky-Landis 115AVX advanced vector extensions 116BA byte align 117BAL basic assembly language 118BAR base address register 119BBS bulletin board system 120BCC blind carbon copy 121BCD binary coded decimal 122BCH boot console handler 123BCR byte count register 124BCS base configuration space 125BD baud 126BDD binary decision diagram 127BDI bit deinterleave 128BDUF big design up front 129BEDO burst extended data output 130BER basic encoding rules 131BER bit error {rate,ratio} 132BERT boot error record table 133BFD bidirectional forwarding detection 134BFD binary {file,format} descriptor 135BFKL big fscking kernel lock 136BFS breadth-first search 137BFT binary file transfer 138BGA ball grid array 139BGP Border Gateway Protocol 140BGPSEC BGP Security 141BIND Berkeley Internet Name Daemon 142BIOS Basic Input/Output System 143BIOS built-in operating system 144BIST built-in self-test 145BIU bus interface unit 146BKDG BIOS and kernel developer's guide 147BLAS basic linear algebra subprograms 148BLC back light control 149BLOB binary large object 150BM bus master 151BMC baseboard management controller 152BMIC bus master interface controller 153BN boundary neutral 154BNF Backus-Naur form 155BO binary output 156BOF beginning of file 157BOM beginning of message 158BOM byte order mark 159BP base pointer 160BP boot processor 161BPB BIOS parameter block 162BPDU bridge protocol data unit 163BPF Berkeley Packet Filter 164BPI bits per inch 165BPM business process modelling 166BPS bits per second 167BPSK binary phase shift keying 168BQS Berkeley quality software 169BRE basic regular expression 170BS backspace 171BS binary sequence 172BSA basic service area 173BSD Berkeley Software Distribution 174BSDP Boot Service Discovery Protocol 175BSF bit scan forward 176BSOD blue screen of death 177BSP binary space partition 178BSP board support package 179BSP bootstrap processor 180BSR bit scan reverse 181BSS basic service set 182BSS block started by symbol 183BSSID basic service set identifier 184BT BitTorrent 185BT Bluetooth 186BT bit test 187BTC bit test [and] complement 188BTM bus transport mechanism 189BTR bit test [and] reset 190BTS bit test [and] set 191BTS bug tracking system 192BW bandwidth 193BWM block-write mode 194BUAG big ugly ASCII graphic 195CA certificate authority 196CAD computer-aided design 197CAM computer assisted manufacturing 198CAM conditional access module 199CAM content addressable memory 200CARP Common Address Redundancy Protocol 201CAS column address strobe 202CAS compare and swap 203CAS computer algebra system 204CASE computer aided software engineering 205CAU control access unit 206CAV constant angular velocity 207CBC cipher block chaining 208CBR constant bit rate 209CC carbon copy 210CCD charge coupled device 211CCI co-channel interferer 212CCNUMA cache-coherent non-uniform memory access 213CCTL command completion time limit 214CD cache disable 215CD compact disc 216CDDA compact disc digital audio 217CDL compiler description language 218CDMA code division multiple access 219CDP Cisco Discovery Protocol 220CDRAM cache dynamic random access memory 221CER canonical encoding rules 222CE customer edge 223CF compact flash 224CFB cipher feedback 225CFG context-free grammar 226CFG control-flow graph 227CFI control-flow integrity sanitizer 228CG control gate 229CGA Color Graphics Adapter 230CGI common gateway interface 231CGN Carrier-Grade NAT 232CHAP Challenge-Handshake Authentication Protocol 233CHFS chip file system 234CHS cylinder/head/sector 235CI continuous integration 236CI {common,component} interface 237CIDR Classless Inter-Domain Routing 238CIF common intermediate format 239CIFS Common Internet File System 240CIL common intermediate language 241CIR carrier-to-interference ratio 242CIS contact image sensor 243CISC complex instruction set {computer,computing} 244CJK Chinese, Japanese, [and] Korean 245CLF common log format 246CLI command line interface 247CLI common language infrastructure 248CLR common language runtime 249CLS common language specification 250CLTT closed loop thermal throttling 251CLUT color look-up table 252CLV constant linear velocity 253CM configuration management 254CMA concert multithread architecture 255CMC chassis management controller 256CMC corrected machine check 257CMS {configuration,content,course} management system 258CMI control {management,method} interface 259CMOS complementary metal-oxide-semiconductor 260CMP chip multi-processing 261CMS content management system 262CMYK cyan magenta yellow black 263CN {common,canonical} name 264CNC computer numerical control 265CNR carrier-to-noise ratio 266COA change of authority 267COF current operating frequency 268COFDM coded orthogonal frequency division multiplexing 269COFF common object file format 270COM component object model 271COM computer on module 272COMA cache-only memory architecture 273CORBA common object request broker architecture 274COS class of service 275COW copy-on-write 276CP continuous pilot 277CPB core performance boost 278CPC central processor complex 279CPC cpu performance counters 280CPE common phase error 281CPE common platform enumeration 282CPER common platform error record 283CPG clock pulse generator 284CPI cycles per instruction 285CPL current privilege level 286CPLD complex programmable logic device 287CPP C preprocessor 288CPS characters per second 289CPS continuation-passing style 290CPT command pass through 291CPU central processing unit 292CR carriage return 293CRC cyclic redundancy check 294CRL carrier recovery loop 295CRLF carriage return line feed 296CRT cathode ray tube 297CRUD create, read, update, and delete 298CS cable select 299CS chip select 300CS code segment 301CS computer science 302CSDL {common,conceptual} schema definition language 303CSI channel state information 304CSI common system interface 305CSMA carrier sense multiple access 306CSMA/CA carrier sense multiple access with collision avoidance 307CSMA/CD carrier sense multiple access with collision detection 308CSP communicating sequential processes 309CSP content security policy 310CSP constrain satisfaction problems 311CSP cryptographic service provider 312CSR control [and] status registers 313CSRG Computer Systems Research Group 314CSS cascading style sheets 315CST common spanning tree 316CSV comma-separated values 317CTF compact c type format 318CTM close to metal 319CTR counter [mode] 320CTS clear to send 321CTS common type system 322CUA common user access 323CUT coordinated universal time 324CV control voltage 325CVE common vulnerabilities and exposures 326CVS Concurrent Versions System 327DA destination address 328DAA distributed application architecture 329DAB digital audio broadcasting 330DAC digital [to] analog converter 331DAC discretionary access control 332DAD duplicate address detection 333DANE DNS-based Authentication of Named Entities 334DAO disk at once 335DAP Directory Access Protocol 336DAT digital audio tape 337DAT dynamic acceleration technology 338DB database 339DBA database administrator 340DBA dynamic bandwidth allocation 341DBB data bus buffer 342DBC design by contract 343DBL dynamic buffer limiting 344DBMS database management system 345DBS database server 346DC direct current 347DCC Direct Client-to-Client 348DCC direct cable connect 349DCD data carrier detect 350DCE data control equipment 351DCE distributed computing environment 352DCIM data center infrastructure management 353DCIM digital camera images 354DCL Digital Command Language 355DCOM distributed component object model 356DCOP Desktop COmmunication Protocol 357DCS data collection systems 358DCT discrete cosine transform 359DCU data cache unit 360DDC display data channel 361DDE dynamic data exchange 362DDI device drivers interface 363DDK device driver kit 364DDL data description language 365DDR double data rate 366DDS direct digital sound 367DDWG Digital Display Working Group 368DE debugging extensions 369DE desktop environment 370DEA data encryption algorithm 371DEC Digital Equipment Corporation 372DEK data encryption key 373DEP data execution prevention 374DER distinguished encoding rules 375DES Data Encryption Standard 376DF don't fragment 377DFA deterministic finite automaton 378DFC data flow control 379DFS depth first search 380DFS distributed file system 381DFSAN Data Flow Sanitizer 382DFT diagnostic function test 383DFT discrete Fourier transform 384DGL data generation language 385DH Diffie-Hellman 386DHCP Dynamic Host Configuration Protocol 387DIFS distributed inter-frame space 388DIMM dual inline memory module 389DIRT design in real time 390DKI driver/kernel interface 391DL diode logic 392DL discrete logarithm 393DL download 394DLCI data link connection identifier 395DLE data link escape 396DLL dynamic link library 397DLP discrete logarithm problem 398DMA direct memory access 399DMI desktop management interface 400DMS document management system 401DMT discrete multitone modulation 402DMU data management layer 403DNARD Digital network appliance reference design 404DND drag and drop 405DNLC directory name lookup cache 406DNS Domain Name System 407DNSSEC DNS Security Extensions 408DOE distributed object environment 409DOF data over fibre 410DOM document object model 411DOS denial of service 412DOS disk operating system 413DP DisplayPort 414DPC deferred procedure call 415DPCM differential pulse code modulation 416DPD dead peer detection 417DPI deep packet inspection 418DPI dots per inch 419DPL descriptor privilege level 420DPS Display PostScript 421DPST display power savings technology 422DRAAS disaster recovery as a service 423DRAM dynamic random access memory 424DRBG deterministic random bit generator 425DRI direct rendering infrastructure 426DRM digital rights management 427DRRS display refresh rate switching 428DS debug store 429DS differentiated services 430DSA digital signature algorithm 431DSAP destination service access point 432DSB double-sideband modulation 433DSCP differentiated services code point 434DSDT differentiated system descriptor table 435DSF device special file 436DSL dataset and snapshot layer 437DSL digital subscriber line 438DSL domain specific language 439DSLAM digital subscriber line access multiplexer 440DSN delivery status notification 441DSO dynamic shared object 442DSP digital signal processor 443DSSS direct sequence spread spectrum 444DTD document type definition 445DTE data terminal equipment 446DTE dumb terminal emulator 447DTL diode-transistor logic 448DTLS datagram transport layer security 449DTS digital thermal sensor 450DUT device under test 451DVB digital video broadcasting 452DVCS distributed version control system 453DVD digital versatile disc 454DVFS dynamic voltage and frequency scaling 455DVI device independent 456DVI Digital Visual Interface 457DVR digital video recorder 458E-XER extended XML encoding rules 459EABI embedded-application binary interface 460EAI Email Address Internationalization 461EAI Enterprise Application Integration 462EAP Extensible Authentication Protocol 463EAPOL EAP over Lan 464EAV entity-attribute-value model 465EAV ethernet audio/video bridging 466EBCDIC Extended Binary Coded Decimal Interchange Code 467EBDA Extended BIOS Data Area 468EBNF extended backus-naur form 469EBR extended boot record 470EC elliptic curve 471ECC elliptic curve cryptography 472ECC error correction code 473ECDH elliptic curve Diffie-Hellman 474ECDL elliptic curve discrete logarithm 475ECDLP elliptic curve discrete logarithm problem 476ECDSA elliptic curve digital signature algorithm 477ECL emitter-coupled logic 478ECN explicit congestion notification 479ECP enhanced capability port 480ECS enhanced chip set 481ECS extended configuration space 482EDAC error detection and correction 483EDAT enhanced dynamic acceleration technology 484EdDSA Edwards curve digital signature algorithm 485EDGE explicit data graph execution 486EDID extended display identification data 487EDO extended data out 488EDS electronical data sheet 489EDSAC electronic delay storage automatic calculator 490EDVAC electronic discrete variable automatic computer 491EEE energy efficient ethernet 492EEPROM electrically erasable programmable read only memory 493EFI extensible firmware interface 494EFL emitter follower logic 495EFM eight to fourteen modulation 496EFS extent file system 497EGA Enhanced Graphics Adapter 498EGP exterior gateway protocol 499EH extension header 500EIDE enhanced IDE 501EISA extended industry standard architecture 502EINJ error injection table 503ELF executable and linking format 504ELS entry level system 505EMI electro-magnetic interference 506EMP electro-magnetic pulse 507EMR electro-magnetic radiation 508EMACS Editor MACroS 509ENIAC electronic numerical integrator and computer 510EOF end of file 511EOI end of interrupt 512EOIS end of interactive support 513EOL end of life 514EOL end of line 515EOT end of transmission 516EPIC explicitly parallel instruction computing 517EPP enhanced parallel port 518EPRML extended partial response, maximum likelihood 519EPROM erasable programmable read only memory 520ERC error recovery control 521ERD emergency recovery disk 522ERD entity relationship diagram 523ERE extended regular expression 524ERST error record serialization table 525ESAN Efficiency Sanitizer 526ESB enterprise service bus 527ESDI enhanced small disk interface 528ESDRAM enhanced synchronous dynamic random access memory 529ESI enclosure services interface 530ESS electronic switching system 531ESS extended service set 532ESSID extended service set identifier 533EST enhanced speedstep 534ETL extract, transform, load 535EU execution unit 536EULA end user license agreement 537FAT file allocation table 538FBRAM frame buffer random access memory 539FCIF full common intermediate format 540FCL fiber channel loop 541FCS frame check sequence 542FDC floppy disk controller 543FDD floppy disk drive 544FDDI fiber distributed data interface 545FDE full disk encryption 546FDT flattened device tree 547FEA finite element analysis 548FEC forward error correction 549FET field-effect transistor 550FF finite field 551FF form feed 552FFDH finite-field Diffie-Hellman 553FFH functional fixed hardware 554FFI foreign function interface 555FFM focus follows mouse 556FFS Fast File System 557FFS find first set 558FFT fast Fourier transform 559FG floating gate 560FHSS frequency hop spread spectrum 561FID frequency identifier 562FIFO first in, first out 563FILO first in, last out 564FIPS Federal Information Processing Standards 565FIR fast infrared 566FLOPS floating [point] operations per second 567FLOSS free/libre/open source software 568FM frequency modulation 569FMR false match rate 570FOSS free/open source software 571FPGA field programmable gate array 572FPM fast page mode 573FPR floating point register 574FPU floating point unit 575FQDN fully qualified domain name 576FRR false rejection rate 577FRU field replaceable unit 578FS file system 579FSB front side bus 580FSCK file system check 581FSF Free Software Foundation 582FSK frequency shift keying 583FSM finite-state machine 584FTA fault tree analysis 585FTL flash translation layer 586FTP File Transfer Protocol 587FTPS File Transfer Protocol Secure 588FUS fast user switching 589FWH firmware hub 590FWS folding white space 591GAL generic array logic 592GARP generic attribute registration protocol 593GAS generic address structure 594GC garbage collector 595GCM Galois counter mode 596GCR group-coded recording 597GDI Graphics Device Interface 598GDT global descriptor table 599GEM graphics environment manager 600GEM graphics execution manager 601GENA general event notification architecture 602GHC Glasgow Haskell compiler 603GHES generic hardware error source 604GIC generic interrupt controller 605GID group identifier 606GIF graphics interchange format 607GMCH graphics and memory controller hub 608GNU GNU's Not Unix 609GOP graphics output protocol 610GOT global offset table 611GPE general purpose event 612GPF general protection fault 613GPG GNU Privacy Guard 614GPL [GNU] General Public License 615GPR general purpose register 616GPS generalized processor sharing 617GPT GUID partition table 618GPU graphics processing unit 619GR golden ratio 620GRE generic routing encapsulation 621GSI global system interrupt 622GUI graphical user interface 623GUID globally unique identifier 624GVFS git virtual file system 625HA high availability 626HAL hardware abstraction layer 627HAT hashed array tree 628HATEOAS hypermedia as the engine of application state 629HBA host bus adapter 630HCF halt and catch fire 631HCI host controller interface 632HCI human-computer interaction 633HCL hardware compatibility list 634HDCP High-bandwidth Digital Content Protection 635HDD hard disk drive 636HDL hardware description language 637HDMI High-Definition Multimedia Interface 638HDTV high-definition television 639HECI host embedded controller interface 640HEST hardware error source table 641HF high frequency 642HFM highest frequency mode 643HFS hierarchical file system 644HID human interface device 645HKP HTTP Keyserver Protocol 646HLL high-level language 647HMA high memory area 648HMI human-machine interface 649HOOD hierarchical object oriented design 650HP Hewlett-Packard 651HPC high performance computing 652HPET high precision event timer 653HSM hardware security module 654HSM hierarchical storage management 655HT hyper-threading 656HTC hardware thermal control 657HTCC high temperature co-fired ceramic 658HTML HyperText Markup Language 659HTT hyper-threading technology 660HTTP Hypertext Transfer Protocol 661HTTPS Hypertext Transfer Protocol Secure 662HVM hardware virtual machine 663HVDS High-Voltage Differential Signaling 664HWASAN Hardware-assisted Address Sanitizer 665HZ Hertz 666I2O intelligent input/output 667IA information assurance 668IAAS infrastructure as a service 669IANA Internet Assigned Numbers Authority 670IBC iterated block cipher 671IBM International Business Machines 672IBS instruction based sampling 673IBSS independent basic service set 674IC integrated circuit 675ICA independent computer architecture 676ICB Internet Citizen's Band 677ICE in-circuit emulator 678ICE internal compiler error 679ICH I/O controller hub 680ICMP Internet Control Message Protocol 681ICT information and communications technology 682ICW initialization command word 683IDA Intel dynamic acceleration 684IDCMP Intuition direct communication message port 685IDE integrated development environment 686IDE integrated drive electronics 687IDPS intrusion detection [and] prevention system 688IDRP inter-domain routing protocol 689IDS intrusion detection system 690IDT interrupt descriptor table 691IE Internet Explorer 692IEC International Electrotechnical Commission 693IEEE Institute of Electrical and Electronics Engineers 694IESG Internet Engineering Steering Group 695IETF Internet Engineering Task Force 696IF intermediate frequency 697IFCM isochronous flow control mode 698IFF Interchange File Format 699IFS internal field separator 700IGD Internet gateway device 701IGMP Internet Group Management Protocol 702IGP interior gateway protocol 703IHV independent hardware vendor 704IKE Internet key exchange 705ILM internal loopback mode 706ILOM integrated lights-out management 707ILP instruction level parallelism 708IM instant messaging 709IMAP Internet Message Access Protocol 710IMC integrated memory controller 711IMCR interrupt mode configuration register 712IMR interrupt mask register 713IMS information management system 714IMSI international mobile subscriber identity 715INCITS InterNational Committee for Information Technology Standards 716IO input/output 717IOCTL input/output control 718IOM input/output managers 719IOMMU input/output memory management unit 720IOT Internet of Things 721IP Internet Protocol 722IP intellectual property 723IPC instructions per cycle 724IPC interprocess communication 725IPCF interprocess communication facility 726IPE integrated programming environment 727IPI intelligent peripheral interface 728IPI interprocessor interrupt 729IPL Initial Program Load 730IPL Interrupt Priority Level 731IPMB Intelligent Platform Management Bus 732IPMI Intelligent Platform Management Interface 733IPNG Internet Protocol, Next Generation 734IPS in-plane switching 735IPS intrusion prevention system 736IPSEC Internet Protocol Security 737IRC Internet Relay Chat 738IRDA infrared data association 739IRDP ICMP Router Discovery Protocol 740IRQ interrupt request 741IRQL interrupt request level 742IRR interrupt request register 743IRTF Internet Research Task Force 744IS information system 745ISA industry standard architecture 746ISA instruction set architecture 747ISE instant secure erase 748ISDN integrated services digital network 749ISI inter-symbol interference 750ISL initial system load 751ISM industrial, scientific, [and] medical 752ISN initial serial number 753ISO International Standards Organization 754ISOC Internet Society 755ISP Internet service provider 756ISR in-service register 757ISR interrupt service routine 758IST internal spanning tree 759IST interrupt stack table 760ISV independent software vendor 761IT information technology 762ITB Intel Turbo Boost 763ITIL information technology infrastructure library 764ITP in-target probe 765ITSM IT service management 766IV initialization vector 767IVT interrupt vector table 768JBOD just a bunch of disks 769JCL Job Control Language 770JFET junction [gate] field-effect transistor 771JIT just in time 772JPEG Joint Photographic Experts Group 773JRE Java Runtime Environment 774JSON JavaScript Object Notation 775JTAG joint test action group 776KASLR kernel address space layout randomization 777KB keyboard 778KB kilobyte 779KBD keyboard 780KBD kilobaud 781KCS keyboard controller style 782KLOC thousand lines of code 783KMS kernel-mode setting 784KPI kernel programming interface 785KVA kernel virtual address 786KVM kernel virtual machine 787KVM kernel virtual memory 788KVM keyboard, video, [and] mouse 789L2CAP link layer control and adaptation protocol 790LAMP Linux Apache MySQL {Perl,PHP,Python} 791LAN local area network 792LAPIC local advanced programmable interrupt controller 793LAR load access rights 794LBA logical block addressing 795LBNF labeled backus-naur form 796LBS location-based service 797LCD liquid crystal display 798LCP link control protocol 799LDA local delivery agent 800LDAP Lightweight Directory Access Protocol 801LDR light-dependent resistor 802LDT local descriptor table 803LE logical extent 804LED light emitting diode 805LELL low energy link layer 806LER label edge router 807LF line feed 808LF low frequency 809LFM lowest frequency mode 810LFN long file names 811LFO low-frequency oscillation 812LFS log-structured file system 813LFU least frequently used 814LHP loop heat pipe 815LIF logical interchange format 816LIFO last in, first out 817LILO LInux LOader 818LILO last in, last out 819LINT local interrupt 820LIR local Internet registry 821LISP LISt Processor 822LISP Locator/ID Separation Protocol 823LKM {Linux,loadable} kernel module 824LKML Linux kernel mailing list 825LL load linked 826LL/SC load linked/store conditional 827LLC logical link control 828LLD low-level design 829LLDD low-level design document 830LLDP link layer discovery protocol 831LLF low level format 832LLMNR link-local multicast name resolution 833LLVM Low Level Virtual Machine 834LM long mode 835LMI local management interface 836LMM link management mode 837LMP link management protocol 838LNO loop nest optimization 839LOC lines of code 840LOM lights-out management 841LPE Linux performance events 842LPC low pin count 843LPS local positioning system 844LRC longitudinal redundancy check 845LRM left-to-right mark 846LRO left-to-right override 847LRU least recently used 848LS link state 849LSAN Leak Sanitizer 850LSB Linux standards base 851LSB least significant {bit,byte} 852LSI large scale integration 853LSL load segment limit 854LSM log structured merge 855LSN Large Scale NAT 856LSN log sequence number 857LSR label switch router 858LTCC low temperature co-fired ceramic 859LTO linear tape-open 860LTO link time optimization 861LTR left to right 862LTR load task register 863LTR letter(-sized paper) 864LTS long term support 865LUA Lua Uppercase Accident 866LUN logical unit number 867LV logical volume 868LVM logical volume management 869LVT local vector table 870LVDS Low-Voltage Differential Signaling 871LWP light-weight process 872LZSS Lempel Ziv Storer Szymanski 873LZW Lempel Ziv Welch 874MAB MAC authentication bypass 875MAC mandatory access control 876MAC {media,medium} access control 877MAC message authentication {check,code} 878MADT multiple APIC descriptor table 879MAMR microwave-assisted magnetic recording 880MB megabyte 881MBA multi-boot agent 882MBR master boot record 883MBS megabits per second 884MC memory controller 885MCA machine check architecture 886MCA MicroChannel architecture 887MCC multiversion concurrency control 888MCE machine check exception 889MCGA Multi-Color Graphics Array 890MCH memory controller hub 891MCLAG multi-chassis link aggregation 892MCM multi-chip module 893MCQ memory controlled queue 894MD machine-dependent 895MD-SAL model-driven service abstraction layer 896MDA mail delivery agent 897MDA Monochrome Display Adapter 898MDC Management Data Clock 899MDI Medium Dependent Interface 900MDI-X Medium Dependent Interface Crossover 901MDIO Management Data Input/Output 902MDMX MIPS Digital Media eXtension 903MDRAM multibank dynamic random access memory 904MESI modified, exclusive, shared, invalid 905MFC merge from current 906MFC Microsoft Foundation Classes 907MFM modified frequency modulation 908MFU most frequently used 909MGCP media gateway control protocol 910MI machine-independent 911MI machine interface 912MIB management information base 913MIC message integrity {check,code} 914MID mobile Internet device 915MIDI musical instrument digital interface 916MIF management information format 917MII media independent interface 918MIM man in the middle 919MIMD multiple instruction, multiple data 920MIME Multipurpose Internet Mail Extensions 921MIMO multiple input multiple output 922MIPS million instructions per second 923MIPS Microprocessor without Interlocked Pipeline Stages 924MISD multiple instruction, single data 925MIT Massachusetts Institute of Technology 926MITM man in the middle 927ML machine language 928ML machine learning 929ML mailing list 930ML markup language 931ML maximum likelihood 932MLC multi-level cell 933MLD multicast listener discovery 934MLHP micro loop heat pipe 935MMF multi-mode fiber 936MMIC monolithic microwave integrated circuit 937MMIO memory mapped input/output 938MMORPG massive multiplayer online role playing game 939MMRP multiple MAC registration protocol 940MMU memory management unit 941MMX matrix math extension 942MMX multimedia extension 943MMX multiple math extension 944MO magneto-optical 945MOESI modified, owned, exclusive, shared, invalid 946MOF maximum operating frequency 947MOSFET metal-oxide-semiconductor field-effect transistor 948MOSI modified, owned, shared, invalid 949MP multi-platform 950MP multiplayer 951MP {multiprocessing,multiprocessor} 952MPEG moving picture experts group 953MPI message passing interface 954MPLS Multiprotocol Label Switching 955MPP massively parallel processor 956MPS memory pool system 957MPS multiprocessor specification 958MQTT Message Queuing Telemetry Transport 959MR modem ready 960MRO method resolution order 961MRP multiple registration protocol 962MRU most recently used 963MS Microsoft 964MSAN Memory Sanitizer 965MSB most significant {bit,byte} 966MSC message sequence chart 967MSE mean square error 968MSF minutes seconds frames 969MSI message signaled interrupt 970MSI modified, shared, invalid 971MSR {machine state,model-specific} register 972MSS maximum segment size 973MSTP Multiple Spanning Tree Protocol 974MT machine translation 975MTA mail transfer agent 976MTBF mean time between failures 977MTP media transfer protocol 978MTRR memory type range register 979MTTF mean time to failure 980MTU maximum transmission unit 981MUA mail user agent 982MUD multi-user domain 983MVCC multiversion concurrency control 984MVR multicast VLAN registration 985MVRP multiple VLAN registration protocol 986MWE module width encoding 987MX mail exchange 988NACK negative acknowledgement 989NAK negative acknowledgement 990NAN not a number 991NAPT Network Address Port Translation 992NAS network attached storage 993NAT network address translation 994NAV network allocation vector 995NC numerical control 996NC-SI network controller sideband interface 997NCO numerically-controlled oscillator 998NCP Network Control Protocol 999NCSI network connectivity status indicator 1000NCQ native command queuing 1001ND neighbor discovery 1002NDFA nondeterministic finite automaton 1003NDIS network driver interface specification 1004NE numeric error 1005NEWS Network extensible Window System 1006NFA nondeterministic finite automaton 1007NFC near-field communication 1008NFCI no functional change intended 1009NFS network file system 1010NFV network function virtualization 1011NIA next instruction address 1012NIC network information center 1013NIC network interface card 1014NIDS network intrusion detection system 1015NIP network interface protocol 1016NIPS network intrusion prevention system 1017NIS network information service 1018NIST National Institute of Standards and Technology 1019NLS native language support 1020NMI non-maskable interrupt 1021NNTP Network News Transfer Protocol 1022NOC network operations center 1023NOP no operation 1024NOS network operating system 1025NP nondeterministic polynomial time 1026NRND not recommended for new designs 1027NRZ non-return to zero 1028NSA nation-state adversary 1029NSA no such agency 1030NSA National Security Agency 1031NTM non-deterministic Turing machine 1032NTP Network Time Protocol 1033NUMA non-uniform memory access 1034NVMM NetBSD Virtual Machine Monitor 1035NVMM non-volatile main memory 1036NVRAM non-volatile random access memory 1037NW not write-through 1038NX no execute 1039OAEP optimal asymmetric encryption padding 1040OAM operations, administration, and {management,maintenance} 1041OBO off by one 1042OBOE off by one error 1043OCL object constraint language 1044OCR optical character recognition 1045ODE offline device environment 1046ODI open data-link interface 1047ODM object data manager 1048ODCM on-demand clock modulation 1049ODT on-die termination 1050OEM original equipment manufacturer 1051OFB output feedback 1052OFDM orthogonal frequency division multiplexing 1053OFET organic field-effect transistor 1054OLAP online analytical processing 1055OLE object linking and embedding 1056OLTP online transaction processing 1057ONFI open nand flash interface 1058OO OpenOffice 1059OO object oriented 1060OOB out of band 1061OOE out of order execution 1062OOM out of memory 1063OOO OpenOffice.org 1064OOP object oriented programming 1065OOPS object oriented programming systems 1066OOSE object oriented software engineering 1067OPM operations per minute 1068OPS operations per second 1069OQL Object Query Language 1070ORB object request broker 1071ORM object-relational mapping 1072OS operating system 1073OSD open source definition 1074OSF open software foundation 1075OSI Open Source Initiative 1076OSI open systems interconnection 1077OSPF open shortest path first 1078OSPM OS power management 1079OSS open sound system 1080OSS open source software 1081OSVW operating system visible workarounds 1082OTP one time password 1083OTP open telecom platform 1084OU organizational unit 1085OUI organizationally unique identifier 1086OWL Web Ontology Language 1087P2P PCI to PCI 1088P2P peer to peer 1089PA phase accumulator 1090PA physical address 1091PAAS platform as a service 1092PAC phase-amplitude converter 1093PAE physical address extension 1094PAGP port aggregation protocol 1095PAL phase alternating line 1096PAL programmable array logic 1097PAM pluggable authentication modules 1098PAM pulse amplitude modulation 1099PAP password authentication protocol 1100PAT page attribute table 1101PAT port address translation 1102PATA parallel ATA 1103PAX portable archive exchange 1104PBE pending break encoding 1105PBE programming by example 1106PC personal computer 1107PC program counter 1108PCB printed circuit board 1109PCB process control block 1110PCB Protocol Control Block 1111PCC Portable C Compiler 1112PCD page-level cache disable 1113PCE path computation element 1114PCE performance-monitor counter enable 1115PCEP Path Computation Element Protocol 1116PCH platform controller hub 1117PCI peripheral component interconnect 1118PCM phase change memory 1119PCM pulse code modulation 1120PCMCIA Personal Computer Memory Card International Association 1121PCP Port Control Protocol 1122PD public domain 1123PDA personal digital assistant 1124PDA pushdown automaton 1125PDAG propositional directed acyclic graph 1126PDB power distribution board 1127PDF portable document format 1128PDM pulse-duration modulation 1129PDN pull-down network 1130PDP page {descriptor,directory} page 1131PDS product data sheet 1132PDU protocol data unit 1133PE protection enable 1134PE provider edge 1135PEAP Protected EAP 1136PECI platform environment control interface 1137PEP protocol extension protocol 1138PER packed encoding rules 1139PFS perfect forward secrecy 1140PGAS partitioned global address space 1141PGE page global enable 1142PGP Pretty Good Privacy 1143PHB PCI host bridge 1144PHP PHP: Hypertext Preprocessor 1145PIC performance instrumentation counters 1146PIC position independent code 1147PIC programmable interrupt controller 1148PICNIC problem in chair, not in computer 1149PID process id 1150PIE position independent executable 1151PIL Priority Interrupt Level 1152PIM personal information manager 1153PIM platform-independent model 1154PIO programmed input/output 1155PIPT physically indexed, physically tagged 1156PIQ prefetch input queue 1157PIT programmable interrupt timer 1158PIV personal identity verification 1159PIX Private Internet eXchange 1160PKCS public-key cryptography standards 1161PKI public key infrastructure 1162PLC programmable logic controller 1163PLD programmable logic device 1164PLL phase locked loop 1165PLRU pseudo LRU 1166PLTM package level thermal management 1167PM power management 1168PM {phase,pulse} modulation 1169PMC performance monitoring counters 1170PME power management event 1171PMEG page map entry group 1172PMI performance monitoring infrastructure 1173PMI platform management interrupt 1174PMIC power management integrated circut 1175PMIO port-mapped input/output 1176PMT photo-multiplier tube 1177PMU performance monitoring units 1178PMU power management unit 1179PNG portable network graphics 1180PNP plug and play 1181POE power over ethernet 1182POF probability of failure 1183POP Post Office Protocol 1184POP power on password 1185POSIX Portable Operating System Interface [for Unix] 1186POST power on self test 1187POTS plain old telephone system 1188POWER Performance Optimization With Enhanced RISC 1189POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1190PP pair programming 1191PPB PCI [to] PCI bridge 1192PPC PowerPC 1193PPC Power Performance Computing 1194PPI pixels per inch 1195PPM pages per minute 1196PPP Point-to-Point Protocol 1197PPPOA Point-to-Point Protocol over ATM 1198PPPOE Point-to-Point Protocol over Ethernet 1199PPU physics processing unit 1200PRAM Parameter RAM 1201PRBS pseudorandom bit sequence 1202PRG pseudorandom generator 1203PRF pseudorandom function [family] 1204PRML partial response, maximum likelihood 1205PRN pseudorandom {noise,number} 1206PRNG pseudorandom number generator 1207PROM programmable read only memory 1208PRP pseudorandom permutation 1209PRU Programmable Realtime Unit 1210PS PostScript 1211PSD power spectral density 1212PSE page size extensions 1213PSK phase shift keying 1214PSK pre-shared key 1215PSTN public switched telephone network 1216PSW program status word 1217PTE page table entry 1218PTLA pseudo top level aggregator 1219PTP page table page 1220PTV perceived target value 1221PU processing unit 1222PUC personal unblocking code 1223PUN physical unit number 1224PV physical volume 1225PVC permanent virtual circuit 1226PVG physical volume group 1227PVI protected-mode virtual interrupt 1228PVRST Per-VLAN rapid spanning tree 1229PVST Per-VLAN Spanning Tree 1230PWM pulse width modulation 1231PXE preboot execution environment 1232QA quality assurance 1233QAM quadrature amplitude modulation 1234QAM quality assurance management 1235QBE query by example 1236QC quality control 1237QDI quasi delay insensitive 1238QCIF quarter common intermediate format 1239QOS quality of service 1240QVL qualified vendor list 1241R/O read only 1242R/W read/write 1243RA receiver address 1244RA remote assistance 1245RA resource affinity 1246RA router advertisement 1247RAD rapid application development 1248RADIUS remote authentication dial-in user service 1249RAID redundant array of {independent,inexpensive} disks 1250RAM random access memory 1251RAS reliability, availability and serviceability 1252RAS remote access service 1253RAS restartable atomic sequence 1254RAS row address strobe 1255RBF radial basis function 1256RBNF routing backus-naur form 1257RBT red-black tree 1258RC release candidate 1259RC remote control 1260RC run commands 1261RCS Revision Control System 1262RCS revision control system 1263RCU read, copy, update 1264RDB Rigid Disk Block 1265RDBMS relational database management system 1266RDF Resource Description Framework 1267RDM relational data model 1268RDMA remote direct memory access 1269RDRAM Rambus DRAM 1270RE regular expression 1271REST representational state transfer 1272RF radio frequency 1273RFI radio frequency interference 1274RFO request for ownership 1275RFU reserved for future use 1276RGB red green blue 1277RGBA red green blue alpha 1278RGMII reduced gigabit media independent interface 1279RH read hit 1280RHEL Red Hat Enterprise Linux 1281RHL Red Hat Linux 1282RIB routing information base 1283RIFF Resource Interchange File Format 1284RIP Raster Image Processor 1285RIP Routing Information Protocol 1286RIR regional Internet registry 1287RISC reduced instruction set {computer,computing} 1288RKM ROM Kernel Manual 1289RLE run length encoding 1290RLL run length limited 1291RLO right-to-left override 1292RM read miss 1293RMCP Remote Management Control Protocol 1294RMI remote method invocation 1295RMO Relaxed Memory Ordering 1296RMPM rapid memory power management 1297RMS root mean square 1298RMW read, modify, write 1299RNG random number generator 1300ROM read only memory 1301RPC remote procedure call 1302RPKI resource PKI 1303RPL requested privilege level 1304RPM revolutions per minute 1305RPN reverse Polish notation 1306RPVST Rapid Per-VLAN Spanning Tree 1307RR random replacement 1308RR round robin 1309RS relay station 1310RSA Rivest, Shamir, [and] Adleman 1311RSIP Realm Specific IP 1312RSN Robust Secure Network 1313RSS really simple syndication 1314RSS residual sum of squares 1315RSTP Rapid Spanning Tree Protocol 1316RT real time 1317RTC real time clock 1318RTC real time computing 1319RTF rich text format 1320RTL register transfer language 1321RTL resistor-transistor logic 1322RTL right to left 1323RTOS real time operating system 1324RTS request to send 1325RTT round trip time 1326RUP rational unified process 1327RW Rabin-Williams 1328RWM read-write memory 1329RX {receive,receiver} 1330S/PDIF Sony/Philips Digital Interface Format 1331SA security advisory 1332SA security association 1333SA source address 1334SA structured analysis 1335SAAS software as a service 1336SABRE Semi-automated business research environment 1337SACD super audio compact disc 1338SAD security association database 1339SAGE Semi-automated ground environment 1340SAL {service,system} abstraction layer 1341SAM serial access memory 1342SAM sum addressed memory 1343SAML security assertion markup language 1344SAN storage area network 1345SAP service access point 1346SAPIC streamlined advanced programmable interrupt controller 1347SASD structured analysis, structured design 1348SASI Shugart Associates System Interface 1349SASL simple authentication [and] security layer 1350SATA serial advanced technology attachment 1351SAX simple API for XML 1352SB sound blaster 1353SBSA server base system architecture 1354SBU standard build unit 1355SC store conditional 1356SCA source code analyzer 1357SCADA supervisory control and data acquisition 1358SCC single chip cloud 1359SCC source code control 1360SCCP skinny call control protocol 1361SCCS Source Code Control System 1362SCI scalable coherent interface 1363SCI system control interrupt 1364SCM software configuration management 1365SCM source code management 1366SCM storage-class memory 1367SCO synchronous connection orientated 1368SCP secure copy 1369SCSI Small Computer System Interface 1370SCTP Stream Control Transmission Protocol 1371SDEI software delegated exception interface 1372SDI symbol deinterleave 1373SDK software development kit 1374SDL Simple Declarative Language 1375SDL Simple Direct-media Layer 1376SDLC {software,system,systems} development life cycle 1377SDN software defined networking 1378SDP Session Description Protocol 1379SDRAM synchronous dynamic random access memory 1380SDS software defined storage 1381SDT syntax-directed translation 1382SEA synchronous external abort 1383SEGV segmentation violation 1384SED self-encrypting drive 1385SED stream editor 1386SEO search engine optimization 1387SES SCSI enclosure services 1388SFC sequential function chart 1389SFI simple firmware interface 1390SFI software fault isolation 1391SFTP SSH File Transfer Protocol 1392SFTP Serial File Transfer Protocol 1393SFTP Simple File Transfer Protocol 1394SGMII serial gigabit media independent interface 1395SGRAM synchronous graphics random access memory 1396SHA secure hash algorithm 1397SIDH supersingular isogeny Diffie-Hellman 1398SIEM security information and event management 1399SIF source input format 1400SIFS short inter-frame space 1401SIM subscriber identity module 1402SIMD single instruction, multiple data 1403SIMM single inline memory module 1404SIP Session Initiation Protocol 1405SIR signal-to-interference ratio 1406SIR slow infrared 1407SISD single instruction, single data 1408SLAAC stateless address auto-configuration 1409SLC single-level cell 1410SLDRAM synchronous-link dynamic random access memory 1411SLED single large expensive disk 1412SLI scalable link interface 1413SLI scan-line interleave 1414SLIC system license internal code 1415SLOC source lines of code 1416SLRU segmented LRU 1417SMA smart memory access 1418SMAF system management action field 1419SMAP Simple Mail Access Protocol 1420SMAP supervisor mode access prevention 1421SMART self-monitoring analysis and reporting technology 1422SMB Server Message Block 1423SMB system management bus 1424SMBIOS System Management BIOS 1425SMC system management controller 1426SMD storage module device 1427SMEP supervisor mode execution protection 1428SMF single mode fiber 1429SMI structure of management information 1430SMI system management interrupt 1431SMM system management mode 1432SMP serial management protocol 1433SMP symmetric multiprocessing 1434SMT simultaneous multithreading 1435SMTP Simple Mail Transfer Protocol 1436SMU system management unit 1437SNA systems network architecture 1438SNAP Sub-Network Access Protocol 1439SNIA Storage Networking Industry Association 1440SNMP Simple Network Management Protocol 1441SNR signal-to-noise ratio 1442SOA service oriented architecture 1443SOAP Simple Object Access Protocol 1444SOC system on chip 1445SOF start of frame 1446SOH start of header 1447SOHO small office/home office 1448SOL serial over LAN 1449SOM system on module 1450SP service pack 1451SP stack pointer 1452SPA storage pool allocator 1453SPAN switched port analyzer 1454SPARC scalable processor architecture 1455SPARQL SPARQL Protocol and RDF Query Language 1456SPD security policy database 1457SPD serial presence detect 1458SPDIF Sony/Philips digital interface format 1459SPI serial peripheral interface 1460SPI stateful packet inspection 1461SPL system interrupt priority level 1462SPL spinlock 1463SPMD single process, multiple data 1464SPR special purpose register 1465SPT sectors per track 1466SQA software quality assurance 1467SQCIF sub quarter common intermediate format 1468SQL Structured Query Language 1469SRAM static random access memory 1470SRC sample rate conversion 1471SRP SCSI RDMA protocol 1472SRR shaped round robin 1473SS self-snoop 1474SS stack segment 1475SSA static single assignment 1476SSAP source service access point 1477SSB single-sideband modulation 1478SSD solid state drive 1479SSE streaming SIMD extensions 1480SSFDC solid state floppy disc card 1481SSH secure shell 1482SSI server side includes 1483SSID service set identifier 1484SSL secure sockets layer 1485SSP stack smashing protection 1486STC software thermal control 1487STD state transition diagram 1488STOMP Streaming Text Oriented Messaging Protocol 1489STP Spanning Tree Protocol 1490STP shielded twisted pair 1491STRG spanning tree root guard 1492SUN Stanford University Network 1493SUS Single Unix Specification 1494SUT system under test 1495SVC switched virtual circuit 1496SVG scalable vector graphics 1497SVGA Super Video Graphics Array 1498SVI {switch,switched} virtual interface 1499SVM secure virtual machine 1500SVM support vector machine 1501SVR System V Release 1502SVS Separate Virtual Space 1503SWF Shockwave Flash 1504SWIG simplified wrapper [and] interface generator 1505SYR symbol timing recovery 1506TA test assertion 1507TA transmitter address 1508TACACS terminal access controller access-control system 1509TAI international atomic time 1510TAO track at once 1511TAOCP The Art of Computer Programming 1512TAP Test Anything Protocol 1513TAS test and set 1514TB terabyte 1515TBNF transitional backus-naur form 1516TCB trace capture buffer 1517TCB trusted computing base 1518TCC thermal control circuit 1519TCL tool command language 1520TCP Transmission Control Protocol 1521TCQ tagged command queueing 1522TDC time [to] digital converter 1523TDD test-driven development 1524TDD time division duplex 1525TDM time division multiplexing 1526TDMA time division multiple access 1527TDOA time difference of arrival 1528TDP thermal design {point,power} 1529TDR time-domain reflectometry 1530TECO Text Editor and Corrector 1531TFT thin film transistor 1532TFTP Trivial File Transfer Protocol 1533TIAS try it and see 1534TIFF tagged image file format 1535TITS try it to see 1536TK temporal key 1537TKIP Temporal Key Integrity Protocol 1538TLA top level aggregator 1539TLB translation lookaside buffer 1540TLD top level domain 1541TLER time-limited error recovery 1542TLI transport layer interface 1543TLS thread local storage 1544TLS transport layer security 1545TM Turing machine 1546TM thermal monitor 1547TMG transmogrifier 1548TMDS transition minimized differential signaling 1549TMO timeout 1550TOD time of day 1551TOS terms of service 1552TOS trusted operating system 1553TOS type of service 1554TP transaction processing 1555TPI tracks per inch 1556TPM transactions per minute 1557TPM trusted platform module 1558TPR task priority register 1559TPS transactions per second 1560TPS transmission parameters signaling 1561TR task register 1562TR token ring 1563TRL timing recovery loop 1564TRNG true random number generator 1565TS terminal services 1566TS time series 1567TS time stamp 1568TS transport stream 1569TSAN Thread Sanitizer 1570TSC time stamp counter 1571TSD time stamp disable 1572TSDB time series database 1573TSL test, set, lock 1574TSO time sharing option 1575TSO Total Store Ordering 1576TSP Time-Stamp Protocol 1577TSP Tunnel Setup Protocol 1578TSP time synchronization protocol 1579TSP traveling salesman problem 1580TSS task state segment 1581TTL time to live 1582TTL transistor-transistor logic 1583TTM translation table maps 1584TTY teletype 1585TUI {terminal,text-based,textual} user interface 1586TX {transmit out,transmitter} 1587TXG transaction group 1588TZ time zone 1589UAC user {access,account} control 1590UAF use-after-free 1591UART universal asynchronous receiver/transmitter 1592UAT user acceptance testing 1593UB undefined behavior 1594UBSAN Undefined Behavior Sanitizer 1595UC uncacheable 1596UCS uniform-cost search 1597UCS unified computing system 1598UCS universal coded character set 1599UDI uniform driver interface 1600UDMA ultra DMA 1601UDO ultra density optical 1602UDP User Datagram Protocol 1603UEFI unified extensible firmware interface 1604UFS Unix File System 1605UGA universal graphics adapter 1606UI unit interval 1607UI user interface 1608UICC universal integrated circuit card 1609UID unique identifier 1610UID user identifier 1611UL upload 1612UMA uniform memory access 1613UMA upper memory area 1614UMB upper memory block 1615UML unified modeling language 1616UMPC ultra-mobile PC 1617UPNP universal plug and play 1618UPS uninterruptible power supply 1619URI uniform resource identifier 1620URL uniform resource locator 1621URN uniform resource name 1622USART universal synchronous/asynchronous receiver/transmitter 1623USB universal serial bus 1624USWC uncacheable speculative write combining 1625UT unit test 1626UTC coordinated universal time 1627UTF unicode transformation formats 1628UTP unshielded twisted pair 1629UUCP Unix-to-Unix Copy Protocol 1630UUID universally unique identifier 1631UUOC useless use of cat 1632UUT unit under test 1633UX user experience 1634VA vertical alignment 1635VA virtual address 1636VA volt-ampere 1637VAX virtual address extension 1638VB Visual Basic 1639VCA variable-gain amplifier 1640VCC common collector voltage 1641VCCP virtual chassis control protocol 1642VCF voltage-controlled filter 1643VCM virtual channel memory 1644VCO voltage-controlled oscillator 1645VCP virtual chassis port 1646VCS version control system 1647VES virtual execution system 1648VESA Video Electronics Standards Association 1649VFO variable-frequency oscillator 1650VFS virtual file system 1651VG volume group 1652VGA Video Graphics Array 1653VHDCI very high density cable interconnect 1654VID {VLAN,voltage level} identifier 1655VIM Vi IMproved 1656VIPT virtually indexed, physically tagged 1657VIVT virtually indexed, virtually tagged 1658VLAN virtual local area network 1659VLIW very long instruction word 1660VLSI very large scale integration 1661VLSM variable length subnet mask 1662VM virtual {machine,memory} 1663VME virtual mode extension 1664VMX vector multimedia extensions 1665VMX virtual machine extensions 1666VOD video on demand 1667VPD vital product data 1668VPN virtual private network 1669VPWS virtual private wire service 1670VR virtual reality 1671VRAM video random access memory 1672VRF virtual routing and forwarding 1673VRM voltage regulator module 1674VROC Virtual RAID On CPU 1675VRRP Virtual Router Redundancy Protocol 1676VSTP VLAN Spanning Tree Protocol 1677VTP VLAN Trunking Protocol 1678VXFS Veritas file sytem 1679VXVM Veritas volume manager 1680W watt 1681W3C World Wide Web Consortium 1682WAFL write anywhere file layout 1683WAMP Web Application Messaging Protocol 1684WAN wide area network 1685WAP Wireless Application Protocol 1686WAP wireless access point 1687WDM Windows Driver Model 1688WDDM Windows Display Driver Model 1689WDT watchdog timer 1690WEP Wired Equivalent Privacy 1691WFI wait for interrupt 1692WFQ weighted fair queuing 1693WH write hit 1694WIFI wireless fidelity 1695WLAN wireless local area network 1696WM write miss 1697WMI Windows Management Instrumentation 1698WOL Wake-on-LAN 1699WOM Wake-on-Modem 1700WOR Wake-on-Ring 1701WORM write once read many 1702WP WordPerfect 1703WP word processor 1704WP write protect 1705WPA Wi-Fi Protected Access 1706WPA2 Wi-Fi Protected Access II 1707WPS Wi-Fi Protected Setup 1708WRAM window random access memory 1709WS web services 1710WTC write through caching 1711WTD weighted tail drop 1712WWAN wireless wide area network 1713WWW world wide web 1714WYSIAYG what you see is all you get 1715WYSIWYG what you see is what you get 1716XBAR crossbar 1717XDMCP X Display Manager control protocol 1718XER XML encoding rules 1719XGA Extended Graphics Array 1720XHR XMLHttpRequest 1721XIP execute in place 1722XML Extensible Markup Language 1723XNA XNA's not acronymed 1724XNS Xerox network systems 1725XOR exclusive or 1726XP extreme programming 1727XSI X/Open System Interface 1728XSL extensible stylesheet language 1729XSLT extensible stylesheet language transformations 1730XSS cross site scripting 1731XT extended technology 1732XTACACS extended terminal access controller access-control system 1733XTI X/Open transport interface 1734XUL XML user interface language 1735YACC yet another compiler compiler 1736YAML YAML ain't markup language 1737YANG yet another next generation 1738YAWPFAPR you are welcome; please file a problem report 1739YP Yellow Pages 1740YTD year to date 1741ZAP ZFS attribute processor 1742ZBR zone bit recording 1743ZFOD zero-filled on demand 1744ZFS zettabyte file system 1745ZIF zero insertion force 1746ZIFS zero insertion force socket 1747ZIL ZFS intent log 1748ZMA zone multicast address 1749ZOI zero one infinity 1750ZOI zone of influence 1751ZPL ZFS Posix layer 1752ZVOL ZFS Volume 1753