acronyms.comp revision 1.279
1$NetBSD: acronyms.comp,v 1.279 2019/07/05 15:33:07 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 198CAD computer-aided design 199CAM computer assisted manufacturing 200CAM conditional access module 201CAM content addressable memory 202CARP Common Address Redundancy Protocol 203CAS column address strobe 204CAS compare and swap 205CAS computer algebra system 206CASE computer aided software engineering 207CAU control access unit 208CAV constant angular velocity 209CBC cipher block chaining 210CBR constant bit rate 211CC carbon copy 212CCD charge coupled device 213CCI co-channel interferer 214CCNUMA cache-coherent non-uniform memory access 215CCTL command completion time limit 216CD cache disable 217CD compact disc 218CDDA compact disc digital audio 219CDL compiler description language 220CDMA code division multiple access 221CDP Cisco Discovery Protocol 222CDRAM cache dynamic random access memory 223CER canonical encoding rules 224CE customer edge 225CF compact flash 226CFB cipher feedback 227CFG context-free grammar 228CFG control-flow graph 229CFI control-flow integrity sanitizer 230CG control gate 231CGA Color Graphics Adapter 232CGI common gateway interface 233CGN Carrier-Grade NAT 234CHAP Challenge-Handshake Authentication Protocol 235CHFS chip file system 236CHS cylinder/head/sector 237CI continuous integration 238CI {common,component} interface 239CIDR Classless Inter-Domain Routing 240CIF common intermediate format 241CIFS Common Internet File System 242CIL common intermediate language 243CIR carrier-to-interference ratio 244CIS contact image sensor 245CISC complex instruction set {computer,computing} 246CJK Chinese, Japanese, [and] Korean 247CLF common log format 248CLI command line interface 249CLI common language infrastructure 250CLR common language runtime 251CLS common language specification 252CLTT closed loop thermal throttling 253CLUT color look-up table 254CLV constant linear velocity 255CM configuration management 256CMA concert multithread architecture 257CMC chassis management controller 258CMC corrected machine check 259CMS {configuration,content,course} management system 260CMI control {management,method} interface 261CMOS complementary metal-oxide-semiconductor 262CMP chip multi-processing 263CMS content management system 264CMYK cyan magenta yellow black 265CN {common,canonical} name 266CNC computer numerical control 267CNR carrier-to-noise ratio 268COA change of authority 269COF current operating frequency 270COFDM coded orthogonal frequency division multiplexing 271COFF common object file format 272COM component object model 273COM computer on module 274COMA cache-only memory architecture 275CORBA common object request broker architecture 276COS class of service 277COW copy-on-write 278CP continuous pilot 279CPB core performance boost 280CPC central processor complex 281CPC cpu performance counters 282CPE common phase error 283CPE common platform enumeration 284CPER common platform error record 285CPG clock pulse generator 286CPI cycles per instruction 287CPL current privilege level 288CPLD complex programmable logic device 289CPP C preprocessor 290CPS characters per second 291CPS continuation-passing style 292CPT command pass through 293CPU central processing unit 294CR carriage return 295CRC cyclic redundancy check 296CRL carrier recovery loop 297CRLF carriage return line feed 298CRT cathode ray tube 299CRUD create, read, update, and delete 300CS cable select 301CS chip select 302CS code segment 303CS computer science 304CSDL {common,conceptual} schema definition language 305CSI channel state information 306CSI common system interface 307CSMA carrier sense multiple access 308CSMA/CA carrier sense multiple access with collision avoidance 309CSMA/CD carrier sense multiple access with collision detection 310CSP communicating sequential processes 311CSP content security policy 312CSP constrain satisfaction problems 313CSP cryptographic service provider 314CSR control [and] status registers 315CSRG Computer Systems Research Group 316CSS cascading style sheets 317CST common spanning tree 318CSV comma-separated values 319CTF compact c type format 320CTM close to metal 321CTR counter [mode] 322CTS clear to send 323CTS common type system 324CUA common user access 325CUT coordinated universal time 326CV control voltage 327CVE common vulnerabilities and exposures 328CVS Concurrent Versions System 329DA destination address 330DAA distributed application architecture 331DAB digital audio broadcasting 332DAC digital [to] analog converter 333DAC discretionary access control 334DAD duplicate address detection 335DANE DNS-based Authentication of Named Entities 336DAO disk at once 337DAP Directory Access Protocol 338DAT digital audio tape 339DAT dynamic acceleration technology 340DB database 341DBA database administrator 342DBA dynamic bandwidth allocation 343DBB data bus buffer 344DBC design by contract 345DBL dynamic buffer limiting 346DBMS database management system 347DBS database server 348DC direct current 349DCC Direct Client-to-Client 350DCC direct cable connect 351DCD data carrier detect 352DCE data control equipment 353DCE distributed computing environment 354DCIM data center infrastructure management 355DCIM digital camera images 356DCL Digital Command Language 357DCOM distributed component object model 358DCOP Desktop COmmunication Protocol 359DCS data collection systems 360DCT discrete cosine transform 361DCU data cache unit 362DDC display data channel 363DDE dynamic data exchange 364DDI device drivers interface 365DDK device driver kit 366DDL data description language 367DDR double data rate 368DDS direct digital sound 369DDWG Digital Display Working Group 370DE debugging extensions 371DE desktop environment 372DEA data encryption algorithm 373DEC Digital Equipment Corporation 374DEK data encryption key 375DEP data execution prevention 376DER distinguished encoding rules 377DES Data Encryption Standard 378DF don't fragment 379DFA deterministic finite automaton 380DFC data flow control 381DFS depth first search 382DFS distributed file system 383DFSAN Data Flow Sanitizer 384DFT diagnostic function test 385DFT discrete Fourier transform 386DGL data generation language 387DH Diffie-Hellman 388DHCP Dynamic Host Configuration Protocol 389DIFS distributed inter-frame space 390DIMM dual inline memory module 391DIRT design in real time 392DKI driver/kernel interface 393DL diode logic 394DL discrete logarithm 395DL download 396DLCI data link connection identifier 397DLE data link escape 398DLL dynamic link library 399DLP discrete logarithm problem 400DMA direct memory access 401DMI desktop management interface 402DMS document management system 403DMT discrete multitone modulation 404DMU data management layer 405DNARD Digital network appliance reference design 406DND drag and drop 407DNLC directory name lookup cache 408DNS Domain Name System 409DNSSEC DNS Security Extensions 410DOE distributed object environment 411DOF data over fibre 412DOM document object model 413DOS denial of service 414DOS disk operating system 415DP DisplayPort 416DPC deferred procedure call 417DPCM differential pulse code modulation 418DPD dead peer detection 419DPI deep packet inspection 420DPI dots per inch 421DPL descriptor privilege level 422DPS Display PostScript 423DPST display power savings technology 424DRAAS disaster recovery as a service 425DRAM dynamic random access memory 426DRBG deterministic random bit generator 427DRI direct rendering infrastructure 428DRM digital rights management 429DRRS display refresh rate switching 430DS debug store 431DS differentiated services 432DSA digital signature algorithm 433DSAP destination service access point 434DSB double-sideband modulation 435DSCP differentiated services code point 436DSDT differentiated system descriptor table 437DSF device special file 438DSL dataset and snapshot layer 439DSL digital subscriber line 440DSL domain specific language 441DSLAM digital subscriber line access multiplexer 442DSN delivery status notification 443DSO dynamic shared object 444DSP digital signal processor 445DSSS direct sequence spread spectrum 446DTB device tree blob 447DTC device tree compiler 448DTD document type definition 449DTE data terminal equipment 450DTE dumb terminal emulator 451DTL diode-transistor logic 452DTLS datagram transport layer security 453DTS device tree source 454DTS digital thermal sensor 455DUT device under test 456DVB digital video broadcasting 457DVCS distributed version control system 458DVD digital versatile disc 459DVFS dynamic voltage and frequency scaling 460DVI device independent 461DVI Digital Visual Interface 462DVR digital video recorder 463E-XER extended XML encoding rules 464EABI embedded-application binary interface 465EAI Email Address Internationalization 466EAI Enterprise Application Integration 467EAP Extensible Authentication Protocol 468EAPOL EAP over Lan 469EAV entity-attribute-value model 470EAV ethernet audio/video bridging 471EBCDIC Extended Binary Coded Decimal Interchange Code 472EBDA Extended BIOS Data Area 473EBNF extended backus-naur form 474EBR extended boot record 475EC elliptic curve 476ECC elliptic curve cryptography 477ECC error correction code 478ECDH elliptic curve Diffie-Hellman 479ECDL elliptic curve discrete logarithm 480ECDLP elliptic curve discrete logarithm problem 481ECDSA elliptic curve digital signature algorithm 482ECL emitter-coupled logic 483ECN explicit congestion notification 484ECP enhanced capability port 485ECS enhanced chip set 486ECS extended configuration space 487EDAC error detection and correction 488EDAT enhanced dynamic acceleration technology 489EdDSA Edwards curve digital signature algorithm 490EDGE explicit data graph execution 491EDID extended display identification data 492EDO extended data out 493EDS electronical data sheet 494EDSAC electronic delay storage automatic calculator 495EDVAC electronic discrete variable automatic computer 496EEE energy efficient ethernet 497EEPROM electrically erasable programmable read only memory 498EFI extensible firmware interface 499EFL emitter follower logic 500EFM eight to fourteen modulation 501EFS extent file system 502EGA Enhanced Graphics Adapter 503EGP exterior gateway protocol 504EH extension header 505EIDE enhanced IDE 506EISA extended industry standard architecture 507EINJ error injection table 508ELF executable and linking format 509ELS entry level system 510EMI electro-magnetic interference 511EMP electro-magnetic pulse 512EMR electro-magnetic radiation 513EMACS Editor MACroS 514ENIAC electronic numerical integrator and computer 515EOF end of file 516EOI end of interrupt 517EOIS end of interactive support 518EOL end of life 519EOL end of line 520EOT end of transmission 521EPIC explicitly parallel instruction computing 522EPP enhanced parallel port 523EPRML extended partial response, maximum likelihood 524EPROM erasable programmable read only memory 525ERC error recovery control 526ERD emergency recovery disk 527ERD entity relationship diagram 528ERE extended regular expression 529ERST error record serialization table 530ESAN Efficiency Sanitizer 531ESB enterprise service bus 532ESDI enhanced small disk interface 533ESDRAM enhanced synchronous dynamic random access memory 534ESI enclosure services interface 535ESS electronic switching system 536ESS extended service set 537ESSID extended service set identifier 538EST enhanced speedstep 539ETL extract, transform, load 540EU execution unit 541EULA end user license agreement 542FAT file allocation table 543FBRAM frame buffer random access memory 544FCIF full common intermediate format 545FCL fiber channel loop 546FCS frame check sequence 547FDC floppy disk controller 548FDD floppy disk drive 549FDDI fiber distributed data interface 550FDE full disk encryption 551FDT flattened device tree 552FEA finite element analysis 553FEC forward error correction 554FET field-effect transistor 555FF finite field 556FF form feed 557FFDH finite-field Diffie-Hellman 558FFH functional fixed hardware 559FFI foreign function interface 560FFM focus follows mouse 561FFS Fast File System 562FFS find first set 563FFT fast Fourier transform 564FG floating gate 565FHSS frequency hop spread spectrum 566FID frequency identifier 567FIFO first in, first out 568FILO first in, last out 569FIPS Federal Information Processing Standards 570FIR fast infrared 571FLOPS floating [point] operations per second 572FLOSS free/libre/open source software 573FM frequency modulation 574FMR false match rate 575FOSS free/open source software 576FPGA field programmable gate array 577FPM fast page mode 578FPR floating point register 579FPU floating point unit 580FQDN fully qualified domain name 581FRR false rejection rate 582FRU field replaceable unit 583FS file system 584FSB front side bus 585FSCK file system check 586FSF Free Software Foundation 587FSK frequency shift keying 588FSM finite-state machine 589FTA fault tree analysis 590FTL flash translation layer 591FTP File Transfer Protocol 592FTPS File Transfer Protocol Secure 593FUS fast user switching 594FWH firmware hub 595FWS folding white space 596GAL generic array logic 597GARP generic attribute registration protocol 598GAS generic address structure 599GC garbage collector 600GCM Galois counter mode 601GCR group-coded recording 602GDI Graphics Device Interface 603GDT global descriptor table 604GEM graphics environment manager 605GEM graphics execution manager 606GENA general event notification architecture 607GHC Glasgow Haskell compiler 608GHES generic hardware error source 609GIC generic interrupt controller 610GID group identifier 611GIF graphics interchange format 612GMCH graphics and memory controller hub 613GNU GNU's Not Unix 614GOP graphics output protocol 615GOT global offset table 616GPE general purpose event 617GPF general protection fault 618GPG GNU Privacy Guard 619GPL [GNU] General Public License 620GPR general purpose register 621GPS generalized processor sharing 622GPT GUID partition table 623GPU graphics processing unit 624GR golden ratio 625GRE generic routing encapsulation 626GSI global system interrupt 627GUI graphical user interface 628GUID globally unique identifier 629GVFS git virtual file system 630HA high availability 631HAL hardware abstraction layer 632HAT hashed array tree 633HATEOAS hypermedia as the engine of application state 634HBA host bus adapter 635HCF halt and catch fire 636HCI host controller interface 637HCI human-computer interaction 638HCL hardware compatibility list 639HDCP High-bandwidth Digital Content Protection 640HDD hard disk drive 641HDL hardware description language 642HDMI High-Definition Multimedia Interface 643HDTV high-definition television 644HECI host embedded controller interface 645HEST hardware error source table 646HEVC high efficiency video coding 647HF high frequency 648HFM highest frequency mode 649HFS hierarchical file system 650HID human interface device 651HKP HTTP Keyserver Protocol 652HLL high-level language 653HMA high memory area 654HMI human-machine interface 655HOOD hierarchical object oriented design 656HP Hewlett-Packard 657HPC high performance computing 658HPET high precision event timer 659HSM hardware security module 660HSM hierarchical storage management 661HT hyper-threading 662HTC hardware thermal control 663HTCC high temperature co-fired ceramic 664HTML HyperText Markup Language 665HTT hyper-threading technology 666HTTP Hypertext Transfer Protocol 667HTTPS Hypertext Transfer Protocol Secure 668HVM hardware virtual machine 669HVDS High-Voltage Differential Signaling 670HWASAN Hardware-assisted Address Sanitizer 671HZ Hertz 672I2O intelligent input/output 673IA information assurance 674IAAS infrastructure as a service 675IANA Internet Assigned Numbers Authority 676IBC iterated block cipher 677IBM International Business Machines 678IBPI international blinking pattern interpretation 679IBS instruction based sampling 680IBSS independent basic service set 681IC integrated circuit 682ICA independent computer architecture 683ICB Internet Citizen's Band 684ICE in-circuit emulator 685ICE internal compiler error 686ICH I/O controller hub 687ICMP Internet Control Message Protocol 688ICT information and communications technology 689ICW initialization command word 690IDA Intel dynamic acceleration 691IDCMP Intuition direct communication message port 692IDCT inverse discrete cosine transform 693IDE integrated development environment 694IDE integrated drive electronics 695IDPS intrusion detection [and] prevention system 696IDRP inter-domain routing protocol 697IDS intrusion detection system 698IDT interrupt descriptor table 699IE Internet Explorer 700IEC International Electrotechnical Commission 701IEEE Institute of Electrical and Electronics Engineers 702IESG Internet Engineering Steering Group 703IETF Internet Engineering Task Force 704IF intermediate frequency 705IFCM isochronous flow control mode 706IFF Interchange File Format 707IFS internal field separator 708IGD Internet gateway device 709IGMP Internet Group Management Protocol 710IGP interior gateway protocol 711IHV independent hardware vendor 712IKE Internet key exchange 713ILM internal loopback mode 714ILOM integrated lights-out management 715ILP instruction level parallelism 716IM instant messaging 717IMAP Internet Message Access Protocol 718IMC integrated memory controller 719IMCR interrupt mode configuration register 720IMR interrupt mask register 721IMS information management system 722IMSI international mobile subscriber identity 723INCITS InterNational Committee for Information Technology Standards 724IO input/output 725IOCTL input/output control 726IOM input/output managers 727IOMMU input/output memory management unit 728IOT Internet of Things 729IP Internet Protocol 730IP intellectual property 731IPC instructions per cycle 732IPC interprocess communication 733IPCF interprocess communication facility 734IPE integrated programming environment 735IPI intelligent peripheral interface 736IPI interprocessor interrupt 737IPL Initial Program Load 738IPL Interrupt Priority Level 739IPMB Intelligent Platform Management Bus 740IPMI Intelligent Platform Management Interface 741IPNG Internet Protocol, Next Generation 742IPS in-plane switching 743IPS intrusion prevention system 744IPSEC Internet Protocol Security 745IRC Internet Relay Chat 746IRDA infrared data association 747IRDP ICMP Router Discovery Protocol 748IRQ interrupt request 749IRQL interrupt request level 750IRR interrupt request register 751IRTF Internet Research Task Force 752IS information system 753ISA industry standard architecture 754ISA instruction set architecture 755ISE instant secure erase 756ISDN integrated services digital network 757ISI inter-symbol interference 758ISL initial system load 759ISM industrial, scientific, [and] medical 760ISN initial serial number 761ISO International Standards Organization 762ISOC Internet Society 763ISP Internet service provider 764ISR in-service register 765ISR interrupt service routine 766IST internal spanning tree 767IST interrupt stack table 768ISV independent software vendor 769IT information technology 770ITB Intel Turbo Boost 771ITIL information technology infrastructure library 772ITP in-target probe 773ITSM IT service management 774IV initialization vector 775IVT interrupt vector table 776JBOD just a bunch of disks 777JCL Job Control Language 778JFET junction [gate] field-effect transistor 779JIT just in time 780JPEG Joint Photographic Experts Group 781JRE Java Runtime Environment 782JSON JavaScript Object Notation 783JTAG joint test action group 784KASLR kernel address space layout randomization 785KB keyboard 786KB kilobyte 787KBD keyboard 788KBD kilobaud 789KCS keyboard controller style 790KLOC thousand lines of code 791KMS kernel-mode setting 792KPI kernel programming interface 793KVA kernel virtual address 794KVM kernel virtual machine 795KVM kernel virtual memory 796KVM keyboard, video, [and] mouse 797L2CAP link layer control and adaptation protocol 798LAMP Linux Apache MySQL {Perl,PHP,Python} 799LAN local area network 800LAPIC local advanced programmable interrupt controller 801LAR load access rights 802LBA logical block addressing 803LBNF labeled backus-naur form 804LBS location-based service 805LCD liquid crystal display 806LCP link control protocol 807LDA local delivery agent 808LDAP Lightweight Directory Access Protocol 809LDR light-dependent resistor 810LDT local descriptor table 811LE logical extent 812LED light emitting diode 813LELL low energy link layer 814LER label edge router 815LF line feed 816LF low frequency 817LFM lowest frequency mode 818LFN long file names 819LFO low-frequency oscillation 820LFS log-structured file system 821LFU least frequently used 822LHP loop heat pipe 823LIF logical interchange format 824LIFO last in, first out 825LILO LInux LOader 826LILO last in, last out 827LINT local interrupt 828LIR local Internet registry 829LISP LISt Processor 830LISP Locator/ID Separation Protocol 831LKM {Linux,loadable} kernel module 832LKML Linux kernel mailing list 833LL load linked 834LL/SC load linked/store conditional 835LLC logical link control 836LLD low-level design 837LLDD low-level design document 838LLDP link layer discovery protocol 839LLF low level format 840LLMNR link-local multicast name resolution 841LLVM Low Level Virtual Machine 842LM long mode 843LMCE local machine check exception 844LMI local management interface 845LMM link management mode 846LMP link management protocol 847LNO loop nest optimization 848LOC lines of code 849LOM lights-out management 850LPE Linux performance events 851LPC low pin count 852LPS local positioning system 853LRC longitudinal redundancy check 854LRM left-to-right mark 855LRO left-to-right override 856LRU least recently used 857LS link state 858LSAN Leak Sanitizer 859LSB Linux standards base 860LSB least significant {bit,byte} 861LSI large scale integration 862LSL load segment limit 863LSM log structured merge 864LSN Large Scale NAT 865LSN log sequence number 866LSR label switch router 867LTCC low temperature co-fired ceramic 868LTO linear tape-open 869LTO link time optimization 870LTR left to right 871LTR load task register 872LTR letter(-sized paper) 873LTS long term support 874LUA Lua Uppercase Accident 875LUN logical unit number 876LV logical volume 877LVM logical volume management 878LVT local vector table 879LVDS Low-Voltage Differential Signaling 880LWP light-weight process 881LZSS Lempel Ziv Storer Szymanski 882LZW Lempel Ziv Welch 883MAB MAC authentication bypass 884MAC mandatory access control 885MAC {media,medium} access control 886MAC message authentication {check,code} 887MADT multiple APIC descriptor table 888MAMR microwave-assisted magnetic recording 889MB megabyte 890MBA multi-boot agent 891MBR master boot record 892MBS megabits per second 893MC memory controller 894MCA machine check architecture 895MCA MicroChannel architecture 896MCC multiversion concurrency control 897MCE machine check exception 898MCGA Multi-Color Graphics Array 899MCH memory controller hub 900MCLAG multi-chassis link aggregation 901MCM multi-chip module 902MCQ memory controlled queue 903MD machine-dependent 904MD-SAL model-driven service abstraction layer 905MDA mail delivery agent 906MDA Monochrome Display Adapter 907MDC Management Data Clock 908MDI Medium Dependent Interface 909MDI-X Medium Dependent Interface Crossover 910MDIO Management Data Input/Output 911MDMX MIPS Digital Media eXtension 912MDRAM multibank dynamic random access memory 913MESI modified, exclusive, shared, invalid 914MFC merge from current 915MFC Microsoft Foundation Classes 916MFM modified frequency modulation 917MFU most frequently used 918MGCP media gateway control protocol 919MHU message handling unit 920MI machine-independent 921MI machine interface 922MIB management information base 923MIC message integrity {check,code} 924MID mobile Internet device 925MIDI musical instrument digital interface 926MIF management information format 927MII media independent interface 928MIM man in the middle 929MIMD multiple instruction, multiple data 930MIME Multipurpose Internet Mail Extensions 931MIMO multiple input multiple output 932MIPS million instructions per second 933MIPS Microprocessor without Interlocked Pipeline Stages 934MISD multiple instruction, single data 935MIT Massachusetts Institute of Technology 936MITM man in the middle 937ML machine language 938ML machine learning 939ML mailing list 940ML markup language 941ML maximum likelihood 942MLC multi-level cell 943MLD multicast listener discovery 944MLHP micro loop heat pipe 945MMF multi-mode fiber 946MMIC monolithic microwave integrated circuit 947MMIO memory mapped input/output 948MMORPG massive multiplayer online role playing game 949MMRP multiple MAC registration protocol 950MMU memory management unit 951MMX matrix math extension 952MMX multimedia extension 953MMX multiple math extension 954MO magneto-optical 955MOESI modified, owned, exclusive, shared, invalid 956MOF maximum operating frequency 957MOSFET metal-oxide-semiconductor field-effect transistor 958MOSI modified, owned, shared, invalid 959MP multi-platform 960MP multiplayer 961MP {multiprocessing,multiprocessor} 962MPEG moving picture experts group 963MPI message passing interface 964MPLS Multiprotocol Label Switching 965MPP massively parallel processor 966MPS memory pool system 967MPS multiprocessor specification 968MQTT Message Queuing Telemetry Transport 969MR modem ready 970MRO method resolution order 971MRP multiple registration protocol 972MRU most recently used 973MS Microsoft 974MSAN Memory Sanitizer 975MSB most significant {bit,byte} 976MSC message sequence chart 977MSE mean square error 978MSF minutes seconds frames 979MSI message signaled interrupt 980MSI modified, shared, invalid 981MSR {machine state,model-specific} register 982MSS maximum segment size 983MSTP Multiple Spanning Tree Protocol 984MT machine translation 985MTA mail transfer agent 986MTBF mean time between failures 987MTP media transfer protocol 988MTRR memory type range register 989MTTF mean time to failure 990MTU maximum transmission unit 991MUA mail user agent 992MUD multi-user domain 993MVCC multiversion concurrency control 994MVR multicast VLAN registration 995MVRP multiple VLAN registration protocol 996MWE module width encoding 997MX mail exchange 998NACK negative acknowledgement 999NAK negative acknowledgement 1000NAN not a number 1001NAPT Network Address Port Translation 1002NAS network attached storage 1003NAT network address translation 1004NAV network allocation vector 1005NC numerical control 1006NC-SI network controller sideband interface 1007NCO numerically-controlled oscillator 1008NCP Network Control Protocol 1009NCSI network connectivity status indicator 1010NCQ native command queuing 1011ND neighbor discovery 1012NDFA nondeterministic finite automaton 1013NDIS network driver interface specification 1014NE numeric error 1015NEWS Network extensible Window System 1016NFA nondeterministic finite automaton 1017NFC near-field communication 1018NFCI no functional change intended 1019NFS network file system 1020NFV network function virtualization 1021NIA next instruction address 1022NIC network information center 1023NIC network interface card 1024NIDS network intrusion detection system 1025NIP network interface protocol 1026NIPS network intrusion prevention system 1027NIS network information service 1028NIST National Institute of Standards and Technology 1029NLS native language support 1030NMI non-maskable interrupt 1031NNTP Network News Transfer Protocol 1032NOC network operations center 1033NOP no operation 1034NOS network operating system 1035NP nondeterministic polynomial time 1036NRND not recommended for new designs 1037NRZ non-return to zero 1038NSA nation-state adversary 1039NSA no such agency 1040NSA National Security Agency 1041NTM non-deterministic Turing machine 1042NTP Network Time Protocol 1043NUMA non-uniform memory access 1044NVMM NetBSD Virtual Machine Monitor 1045NVMM non-volatile main memory 1046NVRAM non-volatile random access memory 1047NW not write-through 1048NX no execute 1049OAEP optimal asymmetric encryption padding 1050OAM operations, administration, and {management,maintenance} 1051OBO off by one 1052OBOE off by one error 1053OCL object constraint language 1054OCR optical character recognition 1055ODE offline device environment 1056ODI open data-link interface 1057ODM object data manager 1058ODCM on-demand clock modulation 1059ODT on-die termination 1060OEM original equipment manufacturer 1061OFB output feedback 1062OFDM orthogonal frequency division multiplexing 1063OFET organic field-effect transistor 1064OLAP online analytical processing 1065OLE object linking and embedding 1066OLTP online transaction processing 1067ONFI open nand flash interface 1068OO OpenOffice 1069OO object oriented 1070OOB out of band 1071OOE out of order execution 1072OOM out of memory 1073OOO OpenOffice.org 1074OOP object oriented programming 1075OOPS object oriented programming systems 1076OOSE object oriented software engineering 1077OPM operations per minute 1078OPS operations per second 1079OQL Object Query Language 1080ORB object request broker 1081ORM object-relational mapping 1082OS operating system 1083OSD open source definition 1084OSF open software foundation 1085OSI Open Source Initiative 1086OSI open systems interconnection 1087OSPF open shortest path first 1088OSPM OS power management 1089OSS open sound system 1090OSS open source software 1091OSVW operating system visible workarounds 1092OTP one time password 1093OTP open telecom platform 1094OU organizational unit 1095OUI organizationally unique identifier 1096OWL Web Ontology Language 1097P2P PCI to PCI 1098P2P peer to peer 1099PA phase accumulator 1100PA physical address 1101PAAS platform as a service 1102PAC phase-amplitude converter 1103PAE physical address extension 1104PAGP port aggregation protocol 1105PAL phase alternating line 1106PAL programmable array logic 1107PAM pluggable authentication modules 1108PAM pulse amplitude modulation 1109PAP password authentication protocol 1110PAT page attribute table 1111PAT port address translation 1112PATA parallel ATA 1113PAX portable archive exchange 1114PBE pending break encoding 1115PBE programming by example 1116PC personal computer 1117PC program counter 1118PCB printed circuit board 1119PCB process control block 1120PCB Protocol Control Block 1121PCC Portable C Compiler 1122PCD page-level cache disable 1123PCE path computation element 1124PCE performance-monitor counter enable 1125PCEP Path Computation Element Protocol 1126PCH platform controller hub 1127PCI peripheral component interconnect 1128PCM phase change memory 1129PCM pulse code modulation 1130PCMCIA Personal Computer Memory Card International Association 1131PCP Port Control Protocol 1132PD public domain 1133PDA personal digital assistant 1134PDA pushdown automaton 1135PDAG propositional directed acyclic graph 1136PDB power distribution board 1137PDF portable document format 1138PDM pulse-duration modulation 1139PDN pull-down network 1140PDP page {descriptor,directory} page 1141PDS product data sheet 1142PDU protocol data unit 1143PE protection enable 1144PE provider edge 1145PEAP Protected EAP 1146PECI platform environment control interface 1147PEP protocol extension protocol 1148PER packed encoding rules 1149PFS perfect forward secrecy 1150PGAS partitioned global address space 1151PGE page global enable 1152PGP Pretty Good Privacy 1153PHB PCI host bridge 1154PHP PHP: Hypertext Preprocessor 1155PIC performance instrumentation counters 1156PIC position independent code 1157PIC programmable interrupt controller 1158PICNIC problem in chair, not in computer 1159PID process id 1160PIE position independent executable 1161PIL Priority Interrupt Level 1162PIM personal information manager 1163PIM platform-independent model 1164PIO programmed input/output 1165PIPT physically indexed, physically tagged 1166PIQ prefetch input queue 1167PIT programmable interrupt timer 1168PIV personal identity verification 1169PIX Private Internet eXchange 1170PKCS public-key cryptography standards 1171PKI public key infrastructure 1172PLC programmable logic controller 1173PLD programmable logic device 1174PLL phase locked loop 1175PLRU pseudo LRU 1176PLTM package level thermal management 1177PM power management 1178PM {phase,pulse} modulation 1179PMC performance monitoring counters 1180PME power management event 1181PMEG page map entry group 1182PMI performance monitoring infrastructure 1183PMI platform management interrupt 1184PMIC power management integrated circut 1185PMIO port-mapped input/output 1186PMT photo-multiplier tube 1187PMU performance monitoring units 1188PMU power management unit 1189PNG portable network graphics 1190PNP plug and play 1191POE power over ethernet 1192POF probability of failure 1193POP Post Office Protocol 1194POP power on password 1195POR plan of record 1196POSIX Portable Operating System Interface [for Unix] 1197POST power on self test 1198POTS plain old telephone system 1199POWER Performance Optimization With Enhanced RISC 1200POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1201PP pair programming 1202PPB PCI [to] PCI bridge 1203PPC PowerPC 1204PPC Power Performance Computing 1205PPI pixels per inch 1206PPM pages per minute 1207PPP Point-to-Point Protocol 1208PPPOA Point-to-Point Protocol over ATM 1209PPPOE Point-to-Point Protocol over Ethernet 1210PPR processor programming reference 1211PPU physics processing unit 1212PRAM Parameter RAM 1213PRBS pseudorandom bit sequence 1214PRG pseudorandom generator 1215PRF pseudorandom function [family] 1216PRML partial response, maximum likelihood 1217PRN pseudorandom {noise,number} 1218PRNG pseudorandom number generator 1219PROM programmable read only memory 1220PRP pseudorandom permutation 1221PRU Programmable Realtime Unit 1222PS PostScript 1223PSD power spectral density 1224PSE page size extensions 1225PSK phase shift keying 1226PSK pre-shared key 1227PSTN public switched telephone network 1228PSW program status word 1229PTE page table entry 1230PTLA pseudo top level aggregator 1231PTP page table page 1232PTV perceived target value 1233PU processing unit 1234PUC personal unblocking code 1235PUN physical unit number 1236PV physical volume 1237PVC permanent virtual circuit 1238PVG physical volume group 1239PVI protected-mode virtual interrupt 1240PVRST Per-VLAN rapid spanning tree 1241PVST Per-VLAN Spanning Tree 1242PWM pulse width modulation 1243PXE preboot execution environment 1244QA quality assurance 1245QAM quadrature amplitude modulation 1246QAM quality assurance management 1247QBE query by example 1248QC quality control 1249QDI quasi delay insensitive 1250QCIF quarter common intermediate format 1251QOS quality of service 1252QVL qualified vendor list 1253R/O read only 1254R/W read/write 1255RA receiver address 1256RA remote assistance 1257RA resource affinity 1258RA router advertisement 1259RAD rapid application development 1260RADIUS remote authentication dial-in user service 1261RAID redundant array of {independent,inexpensive} disks 1262RAM random access memory 1263RAS reliability, availability and serviceability 1264RAS remote access service 1265RAS restartable atomic sequence 1266RAS row address strobe 1267RBF radial basis function 1268RBNF routing backus-naur form 1269RBT red-black tree 1270RC release candidate 1271RC remote control 1272RC run commands 1273RCS Revision Control System 1274RCS revision control system 1275RCU read, copy, update 1276RDB Rigid Disk Block 1277RDBMS relational database management system 1278RDF Resource Description Framework 1279RDM relational data model 1280RDMA remote direct memory access 1281RDRAM Rambus DRAM 1282RE regular expression 1283REST representational state transfer 1284RF radio frequency 1285RFI radio frequency interference 1286RFO request for ownership 1287RFU reserved for future use 1288RGB red green blue 1289RGBA red green blue alpha 1290RGMII reduced gigabit media independent interface 1291RH read hit 1292RHEL Red Hat Enterprise Linux 1293RHL Red Hat Linux 1294RIB routing information base 1295RIFF Resource Interchange File Format 1296RIP Raster Image Processor 1297RIP Routing Information Protocol 1298RIR regional Internet registry 1299RISC reduced instruction set {computer,computing} 1300RKM ROM Kernel Manual 1301RLE run length encoding 1302RLL run length limited 1303RLO right-to-left override 1304RM read miss 1305RMCP Remote Management Control Protocol 1306RMI remote method invocation 1307RMO Relaxed Memory Ordering 1308RMPM rapid memory power management 1309RMS root mean square 1310RMW read, modify, write 1311RNG random number generator 1312ROM read only memory 1313RPC remote procedure call 1314RPKI resource PKI 1315RPL requested privilege level 1316RPM revolutions per minute 1317RPN reverse Polish notation 1318RPVST Rapid Per-VLAN Spanning Tree 1319RR random replacement 1320RR round robin 1321RS relay station 1322RSA Rivest, Shamir, [and] Adleman 1323RSIP Realm Specific IP 1324RSN Robust Secure Network 1325RSS really simple syndication 1326RSS residual sum of squares 1327RSTP Rapid Spanning Tree Protocol 1328RT real time 1329RTC real time clock 1330RTC real time computing 1331RTF rich text format 1332RTL register transfer language 1333RTL resistor-transistor logic 1334RTL right to left 1335RTOS real time operating system 1336RTS request to send 1337RTT round trip time 1338RUP rational unified process 1339RW Rabin-Williams 1340RWM read-write memory 1341RX {receive,receiver} 1342S/PDIF Sony/Philips Digital Interface Format 1343SA security advisory 1344SA security association 1345SA source address 1346SA structured analysis 1347SAAS software as a service 1348SABRE Semi-automated business research environment 1349SACD super audio compact disc 1350SAD security association database 1351SAF-TE SCSI accessed fault-tolerant enclosure 1352SAGE Semi-automated ground environment 1353SAL {service,system} abstraction layer 1354SAM serial access memory 1355SAM sum addressed memory 1356SAML security assertion markup language 1357SAN storage area network 1358SAP service access point 1359SAPIC streamlined advanced programmable interrupt controller 1360SASD structured analysis, structured design 1361SASI Shugart Associates System Interface 1362SASL simple authentication [and] security layer 1363SATA serial advanced technology attachment 1364SAX simple API for XML 1365SB sound blaster 1366SBSA server base system architecture 1367SBU standard build unit 1368SC store conditional 1369SCA source code analyzer 1370SCADA supervisory control and data acquisition 1371SCC single chip cloud 1372SCC source code control 1373SCCP skinny call control protocol 1374SCCS Source Code Control System 1375SCI scalable coherent interface 1376SCI system control interrupt 1377SCM software configuration management 1378SCM source code management 1379SCM storage-class memory 1380SCO synchronous connection orientated 1381SCP secure copy 1382SCP system control processor 1383SCPI system control and power interface 1384SCSI Small Computer System Interface 1385SCTP Stream Control Transmission Protocol 1386SDDC software defined data center 1387SDEI software delegated exception interface 1388SDI symbol deinterleave 1389SDK software development kit 1390SDL Simple Declarative Language 1391SDL Simple Direct-media Layer 1392SDLC {software,system,systems} development life cycle 1393SDN software defined networking 1394SDP Session Description Protocol 1395SDRAM synchronous dynamic random access memory 1396SDS software defined storage 1397SDT syntax-directed translation 1398SEA synchronous external abort 1399SEGV segmentation violation 1400SED self-encrypting drive 1401SED stream editor 1402SEMB serial ATA enclosure management bridge 1403SEO search engine optimization 1404SES SCSI enclosure services 1405SFC sequential function chart 1406SFI simple firmware interface 1407SFI software fault isolation 1408SFTP SSH File Transfer Protocol 1409SFTP Serial File Transfer Protocol 1410SFTP Simple File Transfer Protocol 1411SGMII serial gigabit media independent interface 1412SGPIO serial general purpose input/output 1413SGRAM synchronous graphics random access memory 1414SHA secure hash algorithm 1415SIDH supersingular isogeny Diffie-Hellman 1416SIEM security information and event management 1417SIF source input format 1418SIFS short inter-frame space 1419SIM subscriber identity module 1420SIMD single instruction, multiple data 1421SIMM single inline memory module 1422SIP Session Initiation Protocol 1423SIR signal-to-interference ratio 1424SIR slow infrared 1425SISD single instruction, single data 1426SLAAC stateless address auto-configuration 1427SLC single-level cell 1428SLDRAM synchronous-link dynamic random access memory 1429SLED single large expensive disk 1430SLI scalable link interface 1431SLI scan-line interleave 1432SLIC system license internal code 1433SLOC source lines of code 1434SLRU segmented LRU 1435SMA smart memory access 1436SMAF system management action field 1437SMAP Simple Mail Access Protocol 1438SMAP supervisor mode access prevention 1439SMART self-monitoring analysis and reporting technology 1440SMB Server Message Block 1441SMB system management bus 1442SMBIOS System Management BIOS 1443SMC system management controller 1444SMD storage module device 1445SMEP supervisor mode execution protection 1446SMF single mode fiber 1447SMI structure of management information 1448SMI system management interrupt 1449SMM system management mode 1450SMP serial management protocol 1451SMP symmetric multiprocessing 1452SMT simultaneous multithreading 1453SMTP Simple Mail Transfer Protocol 1454SMU system management unit 1455SNA systems network architecture 1456SNAP Sub-Network Access Protocol 1457SNIA Storage Networking Industry Association 1458SNMP Simple Network Management Protocol 1459SNR signal-to-noise ratio 1460SOA service oriented architecture 1461SOAP Simple Object Access Protocol 1462SOC system on chip 1463SOF start of frame 1464SOH start of header 1465SOHO small office/home office 1466SOL serial over LAN 1467SOM system on module 1468SP service pack 1469SP stack pointer 1470SPA storage pool allocator 1471SPAN switched port analyzer 1472SPARC scalable processor architecture 1473SPARQL SPARQL Protocol and RDF Query Language 1474SPD security policy database 1475SPD serial presence detect 1476SPDIF Sony/Philips digital interface format 1477SPI serial peripheral interface 1478SPI stateful packet inspection 1479SPL system interrupt priority level 1480SPL spinlock 1481SPMD single process, multiple data 1482SPR special purpose register 1483SPT sectors per track 1484SQA software quality assurance 1485SQCIF sub quarter common intermediate format 1486SQL Structured Query Language 1487SRAM static random access memory 1488SRC sample rate conversion 1489SRP SCSI RDMA protocol 1490SRR shaped round robin 1491SS self-snoop 1492SS stack segment 1493SSA static single assignment 1494SSAP source service access point 1495SSB single-sideband modulation 1496SSC spread spectrum clock 1497SSD solid state drive 1498SSE streaming SIMD extensions 1499SSFDC solid state floppy disc card 1500SSH secure shell 1501SSI server side includes 1502SSID service set identifier 1503SSL secure sockets layer 1504SSP stack smashing protection 1505STC software thermal control 1506STD state transition diagram 1507STOMP Streaming Text Oriented Messaging Protocol 1508STP Spanning Tree Protocol 1509STP shielded twisted pair 1510STRG spanning tree root guard 1511SUN Stanford University Network 1512SUS Single Unix Specification 1513SUT system under test 1514SVC switched virtual circuit 1515SVG scalable vector graphics 1516SVGA Super Video Graphics Array 1517SVI {switch,switched} virtual interface 1518SVM secure virtual machine 1519SVM support vector machine 1520SVR System V Release 1521SVS Separate Virtual Space 1522SWF Shockwave Flash 1523SWIG simplified wrapper [and] interface generator 1524SYR symbol timing recovery 1525TA test assertion 1526TA transmitter address 1527TACACS terminal access controller access-control system 1528TAI international atomic time 1529TAO track at once 1530TAOCP The Art of Computer Programming 1531TAP Test Anything Protocol 1532TAS test and set 1533TB terabyte 1534TBNF transitional backus-naur form 1535TCB trace capture buffer 1536TCB trusted computing base 1537TCC thermal control circuit 1538TCL tool command language 1539TCP Transmission Control Protocol 1540TCQ tagged command queueing 1541TDC time [to] digital converter 1542TDD test-driven development 1543TDD time division duplex 1544TDM time division multiplexing 1545TDMA time division multiple access 1546TDOA time difference of arrival 1547TDP thermal design {point,power} 1548TDR time-domain reflectometry 1549TECO Text Editor and Corrector 1550TFT thin film transistor 1551TFTP Trivial File Transfer Protocol 1552TIAS try it and see 1553TIFF tagged image file format 1554TITS try it to see 1555TK temporal key 1556TKIP Temporal Key Integrity Protocol 1557TLA top level aggregator 1558TLB translation lookaside buffer 1559TLD top level domain 1560TLER time-limited error recovery 1561TLI transport layer interface 1562TLS thread local storage 1563TLS transport layer security 1564TM Turing machine 1565TM thermal monitor 1566TMG transmogrifier 1567TMDS transition minimized differential signaling 1568TMO timeout 1569TOD time of day 1570TOS terms of service 1571TOS trusted operating system 1572TOS type of service 1573TP transaction processing 1574TPI tracks per inch 1575TPM transactions per minute 1576TPM trusted platform module 1577TPR task priority register 1578TPS transactions per second 1579TPS transmission parameters signaling 1580TR task register 1581TR token ring 1582TRL timing recovery loop 1583TRNG true random number generator 1584TS terminal services 1585TS time series 1586TS time stamp 1587TS transport stream 1588TSAN Thread Sanitizer 1589TSC time stamp counter 1590TSD time stamp disable 1591TSDB time series database 1592TSL test, set, lock 1593TSO time sharing option 1594TSO Total Store Ordering 1595TSP Time-Stamp Protocol 1596TSP Tunnel Setup Protocol 1597TSP time synchronization protocol 1598TSP traveling salesman problem 1599TSS task state segment 1600TTL time to live 1601TTL transistor-transistor logic 1602TTM translation table maps 1603TTY teletype 1604TUI {terminal,text-based,textual} user interface 1605TX {transmit out,transmitter} 1606TXG transaction group 1607TZ time zone 1608UAC user {access,account} control 1609UAF use-after-free 1610UART universal asynchronous receiver/transmitter 1611UAT user acceptance testing 1612UB undefined behavior 1613UBSAN Undefined Behavior Sanitizer 1614UC uncacheable 1615UCS uniform-cost search 1616UCS unified computing system 1617UCS universal coded character set 1618UDI uniform driver interface 1619UDMA ultra DMA 1620UDO ultra density optical 1621UDP User Datagram Protocol 1622UEFI unified extensible firmware interface 1623UFS Unix File System 1624UGA universal graphics adapter 1625UI unit interval 1626UI user interface 1627UICC universal integrated circuit card 1628UID unique identifier 1629UID user identifier 1630UL upload 1631UMA uniform memory access 1632UMA upper memory area 1633UMB upper memory block 1634UML unified modeling language 1635UMPC ultra-mobile PC 1636UPNP universal plug and play 1637UPS uninterruptible power supply 1638URI uniform resource identifier 1639URL uniform resource locator 1640URN uniform resource name 1641USART universal synchronous/asynchronous receiver/transmitter 1642USB universal serial bus 1643USWC uncacheable speculative write combining 1644UT unit test 1645UTC coordinated universal time 1646UTF unicode transformation formats 1647UTP unshielded twisted pair 1648UUCP Unix-to-Unix Copy Protocol 1649UUID universally unique identifier 1650UUOC useless use of cat 1651UUT unit under test 1652UX user experience 1653VA vertical alignment 1654VA virtual address 1655VA volt-ampere 1656VAX virtual address extension 1657VB Visual Basic 1658VCA variable-gain amplifier 1659VCC common collector voltage 1660VCCP virtual chassis control protocol 1661VCF voltage-controlled filter 1662VCM virtual channel memory 1663VCO voltage-controlled oscillator 1664VCP virtual chassis port 1665VCS version control system 1666VDPAU Video Decode and Presentation API for Unix 1667VES virtual execution system 1668VESA Video Electronics Standards Association 1669VFO variable-frequency oscillator 1670VFS virtual file system 1671VG volume group 1672VGA Video Graphics Array 1673VHDCI very high density cable interconnect 1674VID {VLAN,voltage level} identifier 1675VIM Vi IMproved 1676VIPT virtually indexed, physically tagged 1677VIVT virtually indexed, virtually tagged 1678VLAN virtual local area network 1679VLD variable-length decoding 1680VLIW very long instruction word 1681VLSI very large scale integration 1682VLSM variable length subnet mask 1683VM virtual {machine,memory} 1684VME virtual mode extension 1685VMX vector multimedia extensions 1686VMX virtual machine extensions 1687VOD video on demand 1688VPD vital product data 1689VPN virtual private network 1690VPWS virtual private wire service 1691VR virtual reality 1692VRAM video random access memory 1693VRF virtual routing and forwarding 1694VRM voltage regulator module 1695VROC Virtual RAID On CPU 1696VRRP Virtual Router Redundancy Protocol 1697VSTP VLAN Spanning Tree Protocol 1698VTP VLAN Trunking Protocol 1699VXFS Veritas file sytem 1700VXVM Veritas volume manager 1701W watt 1702W3C World Wide Web Consortium 1703WAFL write anywhere file layout 1704WAMP Web Application Messaging Protocol 1705WAN wide area network 1706WAP Wireless Application Protocol 1707WAP wireless access point 1708WDM Windows Driver Model 1709WDDM Windows Display Driver Model 1710WDT watchdog timer 1711WEP Wired Equivalent Privacy 1712WFI wait for interrupt 1713WFQ weighted fair queuing 1714WH write hit 1715WHEA Windows hardware error architecture 1716WIFI wireless fidelity 1717WLAN wireless local area network 1718WM write miss 1719WMI Windows Management Instrumentation 1720WOL Wake-on-LAN 1721WOM Wake-on-Modem 1722WOR Wake-on-Ring 1723WORM write once read many 1724WP WordPerfect 1725WP word processor 1726WP write protect 1727WPA Wi-Fi Protected Access 1728WPA2 Wi-Fi Protected Access II 1729WPS Wi-Fi Protected Setup 1730WRAM window random access memory 1731WS web services 1732WTC write through caching 1733WTD weighted tail drop 1734WWAN wireless wide area network 1735WWW world wide web 1736WYSIAYG what you see is all you get 1737WYSIWYG what you see is what you get 1738XBAR crossbar 1739XDMCP X Display Manager control protocol 1740XER XML encoding rules 1741XGA Extended Graphics Array 1742XHR XMLHttpRequest 1743XIP execute in place 1744XML Extensible Markup Language 1745XNA XNA's not acronymed 1746XNS Xerox network systems 1747XOR exclusive or 1748XP extreme programming 1749XSI X/Open System Interface 1750XSL extensible stylesheet language 1751XSLT extensible stylesheet language transformations 1752XSS cross site scripting 1753XT extended technology 1754XTACACS extended terminal access controller access-control system 1755XTI X/Open transport interface 1756XUL XML user interface language 1757YACC yet another compiler compiler 1758YAML YAML ain't markup language 1759YANG yet another next generation 1760YAWPFAPR you are welcome; please file a problem report 1761YP Yellow Pages 1762YTD year to date 1763ZAP ZFS attribute processor 1764ZBR zone bit recording 1765ZFOD zero-filled on demand 1766ZFS zettabyte file system 1767ZIF zero insertion force 1768ZIFS zero insertion force socket 1769ZIL ZFS intent log 1770ZMA zone multicast address 1771ZOI zero one infinity 1772ZOI zone of influence 1773ZPL ZFS Posix layer 1774ZVOL ZFS Volume 1775