acronyms.comp revision 1.293
1$NetBSD: acronyms.comp,v 1.293 2019/10/06 15:17:39 sevan Exp $ 23WHS three-way handshake 38VSB 8-state vestigial side band modulation 4AA anti-aliasing 5AAA authentication, authorization, [and] accounting 6AAT average access time 7ABI application binary interface 8ABNF augmented backus-naur form 9ABR available bit rate 10ABRT automatic bug reporting tool 11AC alternating current 12ACI adjacent channel interferer 13ACID atomicity, consistency, isolation, durability 14ACK Amsterdam compiler kit 15ACK acknowledgement 16ACL access control list 17ACL active current loop 18ACL asynchronous connection less 19ACP auxiliary control {process,program} 20ACPI advanced configuration and power interface 21ACS access control set 22ACU automatic calling unit 23ADB Apple desktop bus 24ADC analog [to] digital converter 25ADD acronym driven development 26ADDDC adaptive double DRAM device correction 27ADO active data objects 28ADP automatic data processing 29ADPCM adaptive differential pulse code modulation 30ADS alternate data stream 31ADSL asymmetric digital subscriber line 32ADT abstract data type 33AEDC advanced error detection and correction 34AER advanced error reporting 35AES Advanced Encryption Standard 36AFP Apple Filing Protocol 37AFS Andrew File System 38AGC automatic gain control 39AGP accelerated graphics port 40AI analog input 41AI artificial intelligence 42AL access list 43AL active link 44ALE address latch enable 45ALS ambient light sensor 46ALSA advanced Linux sound architecture 47ALU arithmetic and logical unit 48ALUA asymmetric logical unit access 49AM access method 50AM alignment mask 51AM amplitude modulation 52AMD Advanced Micro Devices Inc 53AMDD Agile model-driven development 54AMI alternate mark inversion 55AMP asymmetric multiprocessing 56AMQP advanced message queuing protocol 57AMT active management technology 58AN Arabic number 59ANR application not responding 60ANSI American National Standards Institute 61AO analog output 62AOC add-on card 63AOL Alert-on-LAN 64AOS add or subtract 65AP access point 66AP application processor 67APFS Apple file system 68API application programming interface 69APEI ACPI platform error interface 70APIC advanced programmable interrupt controller 71APIPA automatic private IP addressing 72APM advanced power management 73APM application performance management 74APU accelerated processing unit 75APT advanced persistent threat 76AQM active queue management 77ARAT always running APIC timer 78ARC adaptive replacement cache 79ARC Advanced RISC Computing 80ARC automatic reference counting 81ARM Advanced RISC Machines 82ARP Address Resolution Protocol 83ARPA Advanced Research Projects Agency 84ARQ automatic repeat request 85ARR address range register 86ARU audio response unit 87AS autonomous system 88ASA Adaptive Security Appliance 89ASAN Address Sanitizer 90ASC advanced smart cache 91ASCII American Standard Code for Information Interchange 92ASD agile software development 93ASE advanced software environment 94ASF alert standard format 95ASIC application-specific integrated circuit 96ASK amplitude shift keying 97ASLR address space layout randomization 98ASN autonomous system number 99ASP active server pages 100ASP auxiliary storage pool 101ASPM active state power management 102ASQ automated software quality 103ASR address space register 104ASR Apple software restore 105AST abstract syntax tree 106AST asynchronous system trap 107AT access time 108AT advanced technology 109ATA advanced technology attachment 110ATAPI advanced technology attachment packet interface 111ATC address translation cache 112ATF ARM trusted firmware 113ATF automated testing framework 114ATM asynchronous transfer mode 115ATX advanced technology extended 116AV anti virus 117AVB audio video bridging 118AVL Adelson-Velsky-Landis 119AVX advanced vector extensions 120AWDL Apple wireless direct link 121BA byte align 122BAL basic assembly language 123BAR base address register 124BBS bulletin board system 125BCC blind carbon copy 126BCD binary coded decimal 127BCH boot console handler 128BCR byte count register 129BCS base configuration space 130BD baud 131BDD binary decision diagram 132BDI bit deinterleave 133BDUF big design up front 134BEDO burst extended data output 135BER basic encoding rules 136BER bit error {rate,ratio} 137BERT boot error record table 138BFD bidirectional forwarding detection 139BFD binary {file,format} descriptor 140BFKL big fscking kernel lock 141BFS breadth-first search 142BFT binary file transfer 143BGA ball grid array 144BGP Border Gateway Protocol 145BGPSEC BGP Security 146BIND Berkeley Internet Name Daemon 147BIOS Basic Input/Output System 148BIOS built-in operating system 149BIST built-in self-test 150BIU bus interface unit 151BKDG BIOS and kernel developer's guide 152BLAS basic linear algebra subprograms 153BLC back light control 154BLE Bluetooth low energy 155BLOB binary large object 156BM bus master 157BMC baseboard management controller 158BMIC bus master interface controller 159BN boundary neutral 160BNF Backus-Naur form 161BO binary output 162BOF beginning of file 163BOM beginning of message 164BOM byte order mark 165BP base pointer 166BP boot processor 167BPB BIOS parameter block 168BPDU bridge protocol data unit 169BPF Berkeley Packet Filter 170BPI bits per inch 171BPM business process modelling 172BPS bits per second 173BPSK binary phase shift keying 174BQS Berkeley quality software 175BRE basic regular expression 176BS backspace 177BS binary sequence 178BSA basic service area 179BSD Berkeley Software Distribution 180BSDP Boot Service Discovery Protocol 181BSF bit scan forward 182BSOD blue screen of death 183BSP binary space partition 184BSP board support package 185BSP bootstrap processor 186BSR bit scan reverse 187BSS basic service set 188BSS block started by symbol 189BSSID basic service set identifier 190BT BitTorrent 191BT Bluetooth 192BT bit test 193BTC bit test [and] complement 194BTM bus transport mechanism 195BTR bit test [and] reset 196BTS bit test [and] set 197BTS bug tracking system 198BW bandwidth 199BWM block-write mode 200BUAG big ugly ASCII graphic 201CA certificate authority 202CACLS change access control lists 203CAD computer-aided design 204CAM computer assisted manufacturing 205CAM conditional access module 206CAM content addressable memory 207CARP Common Address Redundancy Protocol 208CAS column address strobe 209CAS compare and swap 210CAS computer algebra system 211CASE computer aided software engineering 212CAU control access unit 213CAV constant angular velocity 214CBC cipher block chaining 215CBR constant bit rate 216CC carbon copy 217CCD charge coupled device 218CCI co-channel interferer 219CCNUMA cache-coherent non-uniform memory access 220CCTL command completion time limit 221CD cache disable 222CD compact disc 223CDDA compact disc digital audio 224CDL compiler description language 225CDMA code division multiple access 226CDP Cisco Discovery Protocol 227CDRAM cache dynamic random access memory 228CER canonical encoding rules 229CE customer edge 230CF compact flash 231CFB cipher feedback 232CFG context-free grammar 233CFG control-flow graph 234CFI control-flow integrity sanitizer 235CG control gate 236CGA Color Graphics Adapter 237CGI common gateway interface 238CGN Carrier-Grade NAT 239CHAP Challenge-Handshake Authentication Protocol 240CHFS chip file system 241CHS cylinder/head/sector 242CI continuous integration 243CI {common,component} interface 244CIDR Classless Inter-Domain Routing 245CIF common intermediate format 246CIFS Common Internet File System 247CIL common intermediate language 248CIR carrier-to-interference ratio 249CIS contact image sensor 250CISC complex instruction set {computer,computing} 251CJK Chinese, Japanese, [and] Korean 252CLF common log format 253CLI command line interface 254CLI common language infrastructure 255CLR common language runtime 256CLS common language specification 257CLTT closed loop thermal throttling 258CLUT color look-up table 259CLV constant linear velocity 260CM configuration management 261CMA concert multithread architecture 262CMC chassis management controller 263CMC corrected machine check 264CMS {configuration,content,course} management system 265CMI control {management,method} interface 266CMOS complementary metal-oxide-semiconductor 267CMP chip multi-processing 268CMS content management system 269CMYK cyan magenta yellow black 270CN {common,canonical} name 271CNC computer numerical control 272CNR carrier-to-noise ratio 273COA change of authority 274COF current operating frequency 275COFDM coded orthogonal frequency division multiplexing 276COFF common object file format 277COM component object model 278COM computer on module 279COMA cache-only memory architecture 280CORBA common object request broker architecture 281COS class of service 282COW copy-on-write 283CP continuous pilot 284CPB core performance boost 285CPC central processor complex 286CPC cpu performance counters 287CPE common phase error 288CPE common platform enumeration 289CPER common platform error record 290CPG clock pulse generator 291CPI cycles per instruction 292CPL current privilege level 293CPLD complex programmable logic device 294CPP C preprocessor 295CPS characters per second 296CPS continuation-passing style 297CPT command pass through 298CPU central processing unit 299CR carriage return 300CRC cyclic redundancy check 301CRL carrier recovery loop 302CRLF carriage return line feed 303CSU C start up 304CRT cathode ray tube 305CRUD create, read, update, and delete 306CS cable select 307CS chip select 308CS code segment 309CS computer science 310CSDL {common,conceptual} schema definition language 311CSI channel state information 312CSI common system interface 313CSMA carrier sense multiple access 314CSMA/CA carrier sense multiple access with collision avoidance 315CSMA/CD carrier sense multiple access with collision detection 316CSP communicating sequential processes 317CSP content security policy 318CSP constrain satisfaction problems 319CSP cryptographic service provider 320CSR control [and] status registers 321CSRG Computer Systems Research Group 322CSS cascading style sheets 323CST common spanning tree 324CSV comma-separated values 325CTF compact c type format 326CTM close to metal 327CTR counter [mode] 328CTS clear to send 329CTS common type system 330CUA common user access 331CUT coordinated universal time 332CV control voltage 333CVE common vulnerabilities and exposures 334CVS Concurrent Versions System 335DA destination address 336DAA distributed application architecture 337DAAP digital audio access protocol 338DAB digital audio broadcasting 339DAC digital [to] analog converter 340DAC discretionary access control 341DAD duplicate address detection 342DANE DNS-based Authentication of Named Entities 343DAO disk at once 344DAP Directory Access Protocol 345DAT digital audio tape 346DAT dynamic acceleration technology 347DB database 348DBA database administrator 349DBA dynamic bandwidth allocation 350DBB data bus buffer 351DBC design by contract 352DBL dynamic buffer limiting 353DBMS database management system 354DBS database server 355DC direct current 356DCC Direct Client-to-Client 357DCC direct cable connect 358DCD data carrier detect 359DCE data control equipment 360DCE distributed computing environment 361DCIM data center infrastructure management 362DCIM digital camera images 363DCL Digital Command Language 364DCOM distributed component object model 365DCOP Desktop COmmunication Protocol 366DCS data collection systems 367DCT discrete cosine transform 368DCU data cache unit 369DDC display data channel 370DDE dynamic data exchange 371DDI device drivers interface 372DDK device driver kit 373DDL data description language 374DDR double data rate 375DDS direct digital sound 376DDWG Digital Display Working Group 377DE debugging extensions 378DE desktop environment 379DEA data encryption algorithm 380DEC Digital Equipment Corporation 381DEK data encryption key 382DEP data execution prevention 383DER distinguished encoding rules 384DES Data Encryption Standard 385DF don't fragment 386DFA deterministic finite automaton 387DFC data flow control 388DFS depth first search 389DFS distributed file system 390DFSAN Data Flow Sanitizer 391DFT diagnostic function test 392DFT discrete Fourier transform 393DGL data generation language 394DH Diffie-Hellman 395DHCP Dynamic Host Configuration Protocol 396DIA dedicated Internet access 397DIFS distributed inter-frame space 398DIMM dual inline memory module 399DIRT design in real time 400DKI driver/kernel interface 401DL diode logic 402DL discrete logarithm 403DL download 404DLCI data link connection identifier 405DLE data link escape 406DLL dynamic link library 407DLNA digital living network alliance 408DLP discrete logarithm problem 409DMA direct memory access 410DMI desktop management interface 411DMS document management system 412DMT discrete multitone modulation 413DMU data management layer 414DNARD Digital network appliance reference design 415DND drag and drop 416DNLC directory name lookup cache 417DNS Domain Name System 418DNSSEC DNS Security Extensions 419DOE distributed object environment 420DOF data over fibre 421DOM document object model 422DOS denial of service 423DOS disk operating system 424DP DisplayPort 425DPC deferred procedure call 426DPCM differential pulse code modulation 427DPD dead peer detection 428DPI deep packet inspection 429DPI dots per inch 430DPL descriptor privilege level 431DPS Display PostScript 432DPST display power savings technology 433DRAAS disaster recovery as a service 434DRAM dynamic random access memory 435DRBG deterministic random bit generator 436DRI direct rendering infrastructure 437DRM digital rights management 438DRRS display refresh rate switching 439DS debug store 440DS differentiated services 441DSA digital signature algorithm 442DSAP destination service access point 443DSB double-sideband modulation 444DSCP differentiated services code point 445DSDT differentiated system descriptor table 446DSF device special file 447DSL dataset and snapshot layer 448DSL digital subscriber line 449DSL domain specific language 450DSLAM digital subscriber line access multiplexer 451DSN delivery status notification 452DSO dynamic shared object 453DSP digital signal processor 454DSSS direct sequence spread spectrum 455DTB device tree blob 456DTC device tree compiler 457DTD document type definition 458DTE data terminal equipment 459DTE dumb terminal emulator 460DTL diode-transistor logic 461DTLS datagram transport layer security 462DTS device tree source 463DTS digital thermal sensor 464DUT device under test 465DVB digital video broadcasting 466DVCS distributed version control system 467DVD digital versatile disc 468DVFS dynamic voltage and frequency scaling 469DVI device independent 470DVI Digital Visual Interface 471DVR digital video recorder 472E-XER extended XML encoding rules 473EABI embedded-application binary interface 474EAI Email Address Internationalization 475EAI Enterprise Application Integration 476EAP Extensible Authentication Protocol 477EAPOL EAP over Lan 478EAV entity-attribute-value model 479EAV ethernet audio/video bridging 480EBCDIC Extended Binary Coded Decimal Interchange Code 481EBDA Extended BIOS Data Area 482EBNF extended backus-naur form 483EBR extended boot record 484EC elliptic curve 485ECC elliptic curve cryptography 486ECC error correction code 487ECDH elliptic curve Diffie-Hellman 488ECDL elliptic curve discrete logarithm 489ECDLP elliptic curve discrete logarithm problem 490ECDSA elliptic curve digital signature algorithm 491ECL emitter-coupled logic 492ECN explicit congestion notification 493ECP enhanced capability port 494ECS enhanced chip set 495ECS extended configuration space 496EDAC error detection and correction 497EDAT enhanced dynamic acceleration technology 498EdDSA Edwards curve digital signature algorithm 499EDGE explicit data graph execution 500EDID extended display identification data 501EDO extended data out 502EDS electronical data sheet 503EDSAC electronic delay storage automatic calculator 504EDVAC electronic discrete variable automatic computer 505EEE energy efficient ethernet 506EEPROM electrically erasable programmable read only memory 507EFI extensible firmware interface 508EFL emitter follower logic 509EFM eight to fourteen modulation 510EFS extent file system 511EGA Enhanced Graphics Adapter 512EGP exterior gateway protocol 513EH extension header 514EIDE enhanced IDE 515EISA extended industry standard architecture 516EINJ error injection table 517ELF executable and linking format 518ELS entry level system 519EMI electro-magnetic interference 520EMP electro-magnetic pulse 521EMR electro-magnetic radiation 522EMACS Editor MACroS 523ENIAC electronic numerical integrator and computer 524EOF end of file 525EOI end of interrupt 526EOIS end of interactive support 527EOL end of life 528EOL end of line 529EOT end of transmission 530EPIC explicitly parallel instruction computing 531EPP enhanced parallel port 532EPRML extended partial response, maximum likelihood 533EPROM erasable programmable read only memory 534ERC error recovery control 535ERD emergency recovery disk 536ERD entity relationship diagram 537ERE extended regular expression 538ERST error record serialization table 539ESAN Efficiency Sanitizer 540ESB enterprise service bus 541ESDI enhanced small disk interface 542ESDRAM enhanced synchronous dynamic random access memory 543ESI enclosure services interface 544ESS electronic switching system 545ESS extended service set 546ESSID extended service set identifier 547EST enhanced speedstep 548ETL extract, transform, load 549EU execution unit 550EULA end user license agreement 551FAT file allocation table 552FBRAM frame buffer random access memory 553FCIF full common intermediate format 554FCL fiber channel loop 555FCS frame check sequence 556FDC floppy disk controller 557FDD floppy disk drive 558FDDI fiber distributed data interface 559FDE full disk encryption 560FDT flattened device tree 561FEA finite element analysis 562FEC forward error correction 563FET field-effect transistor 564FF finite field 565FF form feed 566FFDH finite-field Diffie-Hellman 567FFH functional fixed hardware 568FFI foreign function interface 569FFM focus follows mouse 570FFS Fast File System 571FFS find first set 572FFT fast Fourier transform 573FG floating gate 574FHSS frequency hop spread spectrum 575FID frequency identifier 576FIFO first in, first out 577FILO first in, last out 578FIPS Federal Information Processing Standards 579FIR fast infrared 580FLOPS floating [point] operations per second 581FLOSS free/libre/open source software 582FM frequency modulation 583FMR false match rate 584FOSS free/open source software 585FPGA field programmable gate array 586FPM fast page mode 587FPR floating point register 588FPU floating point unit 589FQDN fully qualified domain name 590FRR false rejection rate 591FRU field replaceable unit 592FS file system 593FSB front side bus 594FSCK file system check 595FSF Free Software Foundation 596FSK frequency shift keying 597FSM finite-state machine 598FTA fault tree analysis 599FTL flash translation layer 600FTP File Transfer Protocol 601FTPS File Transfer Protocol Secure 602FUS fast user switching 603FWH firmware hub 604FWS folding white space 605GAL generic array logic 606GARP generic attribute registration protocol 607GAS generic address structure 608GC garbage collector 609GCM Galois counter mode 610GCR group-coded recording 611GDI Graphics Device Interface 612GDT global descriptor table 613GECOS general comprehensive operating supervisor 614GEM graphics environment manager 615GEM graphics execution manager 616GENA general event notification architecture 617GHC Glasgow Haskell compiler 618GHES generic hardware error source 619GIC generic interrupt controller 620GID group identifier 621GIF graphics interchange format 622GMCH graphics and memory controller hub 623GNU GNU's Not Unix 624GOP graphics output protocol 625GOT global offset table 626GPE general purpose event 627GPF general protection fault 628GPG GNU Privacy Guard 629GPL [GNU] General Public License 630GPR general purpose register 631GPS generalized processor sharing 632GPT GUID partition table 633GPU graphics processing unit 634GR golden ratio 635GRE generic routing encapsulation 636GSI global system interrupt 637GUI graphical user interface 638GUID globally unique identifier 639GVFS git virtual file system 640HA high availability 641HAL hardware abstraction layer 642HAT hashed array tree 643HATEOAS hypermedia as the engine of application state 644HBA host bus adapter 645HCF halt and catch fire 646HCI host controller interface 647HCI human-computer interaction 648HCL hardware compatibility list 649HDCP High-bandwidth Digital Content Protection 650HDD hard disk drive 651HDL hardware description language 652HDMI High-Definition Multimedia Interface 653HDTV high-definition television 654HECI host embedded controller interface 655HEST hardware error source table 656HEVC high efficiency video coding 657HF high frequency 658HFM highest frequency mode 659HFS hierarchical file system 660HID human interface device 661HKP HTTP Keyserver Protocol 662HLL high-level language 663HMA high memory area 664HMI human-machine interface 665HOOD hierarchical object oriented design 666HP Hewlett-Packard 667HPC high performance computing 668HPET high precision event timer 669HSM hardware security module 670HSM hierarchical storage management 671HT hyper-threading 672HTC hardware thermal control 673HTCC high temperature co-fired ceramic 674HTML HyperText Markup Language 675HTT hyper-threading technology 676HTTP Hypertext Transfer Protocol 677HTTPS Hypertext Transfer Protocol Secure 678HVM hardware virtual machine 679HVDS High-Voltage Differential Signaling 680HWASAN Hardware-assisted Address Sanitizer 681HZ Hertz 682I2O intelligent input/output 683IA information assurance 684IAAS infrastructure as a service 685IANA Internet Assigned Numbers Authority 686IBC iterated block cipher 687IBM International Business Machines 688IBPI international blinking pattern interpretation 689IBS instruction based sampling 690IBSS independent basic service set 691IC integrated circuit 692ICA independent computer architecture 693ICACLS integrity control access control lists 694ICB Internet Citizen's Band 695ICE in-circuit emulator 696ICE internal compiler error 697ICH I/O controller hub 698ICMP Internet Control Message Protocol 699ICT information and communications technology 700ICW initialization command word 701IDA Intel dynamic acceleration 702IDCMP Intuition direct communication message port 703IDCT inverse discrete cosine transform 704IDE integrated development environment 705IDE integrated drive electronics 706IDPS intrusion detection [and] prevention system 707IDRP inter-domain routing protocol 708IDS intrusion detection system 709IDT interrupt descriptor table 710IE Internet Explorer 711IEC International Electrotechnical Commission 712IEEE Institute of Electrical and Electronics Engineers 713IESG Internet Engineering Steering Group 714IETF Internet Engineering Task Force 715IF intermediate frequency 716IFCM isochronous flow control mode 717IFF Interchange File Format 718IFS internal field separator 719IGD Internet gateway device 720IGMP Internet Group Management Protocol 721IGP interior gateway protocol 722IHV independent hardware vendor 723IKE Internet key exchange 724ILM internal loopback mode 725ILOM integrated lights-out management 726ILP instruction level parallelism 727IM instant messaging 728IMAP Internet Message Access Protocol 729IMC integrated memory controller 730IMCR interrupt mode configuration register 731IMR interrupt mask register 732IMS information management system 733IMSI international mobile subscriber identity 734INCITS InterNational Committee for Information Technology Standards 735INODE index node 736IO input/output 737IOCTL input/output control 738IOM input/output managers 739IOMMU input/output memory management unit 740IOT Internet of Things 741IP Internet Protocol 742IP intellectual property 743IPC instructions per cycle 744IPC interprocess communication 745IPCF interprocess communication facility 746IPE integrated programming environment 747IPI intelligent peripheral interface 748IPI interprocessor interrupt 749IPL Initial Program Load 750IPL Interrupt Priority Level 751IPMB Intelligent Platform Management Bus 752IPMI Intelligent Platform Management Interface 753IPNG Internet Protocol, Next Generation 754IPS in-plane switching 755IPS intrusion prevention system 756IPSEC Internet Protocol Security 757IRC Internet Relay Chat 758IRDA infrared data association 759IRDP ICMP Router Discovery Protocol 760IRQ interrupt request 761IRQL interrupt request level 762IRR interrupt request register 763IRTF Internet Research Task Force 764IS information system 765ISA industry standard architecture 766ISA instruction set architecture 767ISE instant secure erase 768ISDN integrated services digital network 769ISI inter-symbol interference 770ISL initial system load 771ISM industrial, scientific, [and] medical 772ISN initial serial number 773ISO International Standards Organization 774ISOC Internet Society 775ISP Internet service provider 776ISR in-service register 777ISR interrupt service routine 778IST internal spanning tree 779IST interrupt stack table 780ISV independent software vendor 781IT information technology 782ITB Intel Turbo Boost 783ITIL information technology infrastructure library 784ITP in-target probe 785ITSM IT service management 786IV initialization vector 787IVT interrupt vector table 788JBOD just a bunch of disks 789JCL Job Control Language 790JFET junction [gate] field-effect transistor 791JIT just in time 792JPEG Joint Photographic Experts Group 793JRE Java Runtime Environment 794JSON JavaScript Object Notation 795JTAG joint test action group 796KASLR kernel address space layout randomization 797KB keyboard 798KB kilobyte 799KBD keyboard 800KBD kilobaud 801KCS keyboard controller style 802KLOC thousand lines of code 803KMS kernel-mode setting 804KPI kernel programming interface 805KVA kernel virtual address 806KVM kernel virtual machine 807KVM kernel virtual memory 808KVM keyboard, video, [and] mouse 809L2CAP link layer control and adaptation protocol 810LAMP Linux Apache MySQL {Perl,PHP,Python} 811LAN local area network 812LAPIC local advanced programmable interrupt controller 813LAR load access rights 814LBA logical block addressing 815LBNF labeled backus-naur form 816LBS location-based service 817LCD liquid crystal display 818LCP link control protocol 819LDA local delivery agent 820LDAP Lightweight Directory Access Protocol 821LDR light-dependent resistor 822LDT local descriptor table 823LE logical extent 824LED light emitting diode 825LELL low energy link layer 826LER label edge router 827LF line feed 828LF low frequency 829LFM lowest frequency mode 830LFN long file names 831LFO low-frequency oscillation 832LFS log-structured file system 833LFU least frequently used 834LHP loop heat pipe 835LIF logical interchange format 836LIFO last in, first out 837LILO LInux LOader 838LILO last in, last out 839LINT local interrupt 840LIR local Internet registry 841LISP LISt Processor 842LISP Locator/ID Separation Protocol 843LKM {Linux,loadable} kernel module 844LKML Linux kernel mailing list 845LL load linked 846LL/SC load linked/store conditional 847LLC logical link control 848LLD low-level design 849LLDD low-level design document 850LLDP link layer discovery protocol 851LLF low level format 852LLMNR link-local multicast name resolution 853LLVM Low Level Virtual Machine 854LM long mode 855LMCE local machine check exception 856LMI local management interface 857LMM link management mode 858LMP link management protocol 859LNO loop nest optimization 860LOC lines of code 861LOM lights-out management 862LPE Linux performance events 863LPC low pin count 864LPS local positioning system 865LRC longitudinal redundancy check 866LRM left-to-right mark 867LRO left-to-right override 868LRU least recently used 869LS link state 870LSAN Leak Sanitizer 871LSB Linux standards base 872LSB least significant {bit,byte} 873LSI large scale integration 874LSL load segment limit 875LSM log structured merge 876LSN Large Scale NAT 877LSN log sequence number 878LSR label switch router 879LTCC low temperature co-fired ceramic 880LTO linear tape-open 881LTO link time optimization 882LTR left to right 883LTR load task register 884LTR letter(-sized paper) 885LTS long term support 886LUA Lua Uppercase Accident 887LUN logical unit number 888LV logical volume 889LVM logical volume management 890LVT local vector table 891LVDS Low-Voltage Differential Signaling 892LWP light-weight process 893LZSS Lempel Ziv Storer Szymanski 894LZW Lempel Ziv Welch 895MAB MAC authentication bypass 896MAC mandatory access control 897MAC {media,medium} access control 898MAC message authentication {check,code} 899MADT multiple APIC descriptor table 900MAMR microwave-assisted magnetic recording 901MB megabyte 902MBA multi-boot agent 903MBR master boot record 904MBS megabits per second 905MC memory controller 906MCA machine check architecture 907MCA MicroChannel architecture 908MCC multiversion concurrency control 909MCE machine check exception 910MCGA Multi-Color Graphics Array 911MCH memory controller hub 912MCLAG multi-chassis link aggregation 913MCM multi-chip module 914MCQ memory controlled queue 915MD machine-dependent 916MD-SAL model-driven service abstraction layer 917MDA mail delivery agent 918MDA Monochrome Display Adapter 919MDC Management Data Clock 920MDI Medium Dependent Interface 921MDI-X Medium Dependent Interface Crossover 922MDIO Management Data Input/Output 923MDMX MIPS Digital Media eXtension 924MDRAM multibank dynamic random access memory 925MESI modified, exclusive, shared, invalid 926MFC merge from current 927MFC Microsoft Foundation Classes 928MFM modified frequency modulation 929MFU most frequently used 930MGCP media gateway control protocol 931MHU message handling unit 932MI machine-independent 933MI machine interface 934MIB management information base 935MIC message integrity {check,code} 936MID mobile Internet device 937MIDI musical instrument digital interface 938MIF management information format 939MII media independent interface 940MIM man in the middle 941MIMD multiple instruction, multiple data 942MIME Multipurpose Internet Mail Extensions 943MIMO multiple input multiple output 944MIPS million instructions per second 945MIPS Microprocessor without Interlocked Pipeline Stages 946MISD multiple instruction, single data 947MIT Massachusetts Institute of Technology 948MITM man in the middle 949ML machine language 950ML machine learning 951ML mailing list 952ML markup language 953ML maximum likelihood 954MLC multi-level cell 955MLD multicast listener discovery 956MLHP micro loop heat pipe 957MMF multi-mode fiber 958MMIC monolithic microwave integrated circuit 959MMIO memory mapped input/output 960MMORPG massive multiplayer online role playing game 961MMRP multiple MAC registration protocol 962MMU memory management unit 963MMX matrix math extension 964MMX multimedia extension 965MMX multiple math extension 966MO magneto-optical 967MOESI modified, owned, exclusive, shared, invalid 968MOF maximum operating frequency 969MOSFET metal-oxide-semiconductor field-effect transistor 970MOSI modified, owned, shared, invalid 971MP multi-platform 972MP multiplayer 973MP {multiprocessing,multiprocessor} 974MPEG moving picture experts group 975MPI message passing interface 976MPLS Multiprotocol Label Switching 977MPP massively parallel processor 978MPS memory pool system 979MPS multiprocessor specification 980MQTT Message Queuing Telemetry Transport 981MR modem ready 982MRO method resolution order 983MRP multiple registration protocol 984MRU most recently used 985MS Microsoft 986MSAN Memory Sanitizer 987MSB most significant {bit,byte} 988MSC message sequence chart 989MSE mean square error 990MSF minutes seconds frames 991MSI message signaled interrupt 992MSI modified, shared, invalid 993MSR {machine state,model-specific} register 994MSS maximum segment size 995MSTP Multiple Spanning Tree Protocol 996MT machine translation 997MTA mail transfer agent 998MTBF mean time between failures 999MTP media transfer protocol 1000MTRR memory type range register 1001MTTF mean time to failure 1002MTU maximum transmission unit 1003MUA mail user agent 1004MUD multi-user domain 1005MVCC multiversion concurrency control 1006MVR multicast VLAN registration 1007MVRP multiple VLAN registration protocol 1008MWE module width encoding 1009MX mail exchange 1010NACK negative acknowledgement 1011NAK negative acknowledgement 1012NAN neighbor awareness networking 1013NAN not a number 1014NAPT Network Address Port Translation 1015NAS network attached storage 1016NAT network address translation 1017NAV network allocation vector 1018NC numerical control 1019NC-SI network controller sideband interface 1020NCO numerically-controlled oscillator 1021NCP Network Control Protocol 1022NCSI network connectivity status indicator 1023NCQ native command queuing 1024ND neighbor discovery 1025NDFA nondeterministic finite automaton 1026NDIS network driver interface specification 1027NE numeric error 1028NEWS Network extensible Window System 1029NFA nondeterministic finite automaton 1030NFC near-field communication 1031NFCI no functional change intended 1032NFS network file system 1033NFV network function virtualization 1034NIA next instruction address 1035NIC network information center 1036NIC network interface card 1037NIDS network intrusion detection system 1038NIP network interface protocol 1039NIPS network intrusion prevention system 1040NIS network information service 1041NIST National Institute of Standards and Technology 1042NLS native language support 1043NMI non-maskable interrupt 1044NNTP Network News Transfer Protocol 1045NOC network operations center 1046NOP no operation 1047NOS network operating system 1048NP nondeterministic polynomial time 1049NRND not recommended for new designs 1050NRZ non-return to zero 1051NSA nation-state adversary 1052NSA no such agency 1053NSA National Security Agency 1054NTM non-deterministic Turing machine 1055NTP Network Time Protocol 1056NUMA non-uniform memory access 1057NURBS non-uniform rational basis spline 1058NVMM NetBSD Virtual Machine Monitor 1059NVMM non-volatile main memory 1060NVRAM non-volatile random access memory 1061NW not write-through 1062NX no execute 1063OAEP optimal asymmetric encryption padding 1064OAM operations, administration, and {management,maintenance} 1065OBO off by one 1066OBOE off by one error 1067OCL object constraint language 1068OCR optical character recognition 1069ODE offline device environment 1070ODI open data-link interface 1071ODM object data manager 1072ODCM on-demand clock modulation 1073ODT on-die termination 1074OEM original equipment manufacturer 1075OFB output feedback 1076OFDM orthogonal frequency division multiplexing 1077OFET organic field-effect transistor 1078OLAP online analytical processing 1079OLE object linking and embedding 1080OLTP online transaction processing 1081ONFI open nand flash interface 1082OO OpenOffice 1083OO object oriented 1084OOB out of band 1085OOE out of order execution 1086OOM out of memory 1087OOO OpenOffice.org 1088OOP object oriented programming 1089OOPS object oriented programming systems 1090OOSE object oriented software engineering 1091OPM operations per minute 1092OPS operations per second 1093OQL Object Query Language 1094ORB object request broker 1095ORM object-relational mapping 1096OS operating system 1097OSD open source definition 1098OSF open software foundation 1099OSI Open Source Initiative 1100OSI open systems interconnection 1101OSPF open shortest path first 1102OSPM OS power management 1103OSS open sound system 1104OSS open source software 1105OSVW operating system visible workarounds 1106OTP one time password 1107OTP open telecom platform 1108OU organizational unit 1109OUI organizationally unique identifier 1110OWL Web Ontology Language 1111P2P PCI to PCI 1112P2P peer to peer 1113PA phase accumulator 1114PA physical address 1115PAAS platform as a service 1116PAC phase-amplitude converter 1117PAE physical address extension 1118PAGP port aggregation protocol 1119PAL phase alternating line 1120PAL programmable array logic 1121PAM pluggable authentication modules 1122PAM pulse amplitude modulation 1123PAP password authentication protocol 1124PAT page attribute table 1125PAT port address translation 1126PATA parallel ATA 1127PAX portable archive exchange 1128PBE pending break encoding 1129PBE programming by example 1130PC personal computer 1131PC program counter 1132PCB printed circuit board 1133PCB process control block 1134PCB Protocol Control Block 1135PCC Portable C Compiler 1136PCD page-level cache disable 1137PCE path computation element 1138PCE performance-monitor counter enable 1139PCEP Path Computation Element Protocol 1140PCH platform controller hub 1141PCI peripheral component interconnect 1142PCM phase change memory 1143PCM pulse code modulation 1144PCMCIA Personal Computer Memory Card International Association 1145PCP Port Control Protocol 1146PD public domain 1147PDA personal digital assistant 1148PDA pushdown automaton 1149PDAG propositional directed acyclic graph 1150PDB power distribution board 1151PDF portable document format 1152PDM pulse-duration modulation 1153PDN pull-down network 1154PDP page {descriptor,directory} page 1155PDS product data sheet 1156PDU protocol data unit 1157PE protection enable 1158PE provider edge 1159PEAP Protected EAP 1160PECI platform environment control interface 1161PEP protocol extension protocol 1162PER packed encoding rules 1163PFS perfect forward secrecy 1164PGAS partitioned global address space 1165PGE page global enable 1166PGP Pretty Good Privacy 1167PHB PCI host bridge 1168PHP PHP: Hypertext Preprocessor 1169PIC performance instrumentation counters 1170PIC position independent code 1171PIC programmable interrupt controller 1172PICNIC problem in chair, not in computer 1173PID process id 1174PIE position independent executable 1175PIL Priority Interrupt Level 1176PIM personal information manager 1177PIM platform-independent model 1178PIO programmed input/output 1179PIPT physically indexed, physically tagged 1180PIQ prefetch input queue 1181PIT programmable interrupt timer 1182PIV personal identity verification 1183PIX Private Internet eXchange 1184PKCS public-key cryptography standards 1185PKI public key infrastructure 1186PLC programmable logic controller 1187PLD programmable logic device 1188PLL phase locked loop 1189PLRU pseudo LRU 1190PLTM package level thermal management 1191PM power management 1192PM {phase,pulse} modulation 1193PMC performance monitoring counters 1194PME power management event 1195PMEG page map entry group 1196PMI performance monitoring infrastructure 1197PMI platform management interrupt 1198PMIC power management integrated circut 1199PMIO port-mapped input/output 1200PMT photo-multiplier tube 1201PMU performance monitoring units 1202PMU power management unit 1203PNG portable network graphics 1204PNP plug and play 1205POE power over ethernet 1206POF probability of failure 1207POP Post Office Protocol 1208POP power on password 1209POR plan of record 1210POSIX Portable Operating System Interface [for Unix] 1211POST power on self test 1212POTS plain old telephone system 1213POWER Performance Optimization With Enhanced RISC 1214POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1215PP pair programming 1216PPB PCI [to] PCI bridge 1217PPC PowerPC 1218PPC Power Performance Computing 1219PPI pixels per inch 1220PPM pages per minute 1221PPP Point-to-Point Protocol 1222PPPOA Point-to-Point Protocol over ATM 1223PPPOE Point-to-Point Protocol over Ethernet 1224PPR processor programming reference 1225PPT powerpoint 1226PPT punched paper tape 1227PPU physics processing unit 1228PRAM Parameter RAM 1229PRBS pseudorandom bit sequence 1230PRG pseudorandom generator 1231PRF pseudorandom function [family] 1232PRML partial response, maximum likelihood 1233PRN pseudorandom {noise,number} 1234PRNG pseudorandom number generator 1235PROM programmable read only memory 1236PRP pseudorandom permutation 1237PRU Programmable Realtime Unit 1238PS PostScript 1239PSD power spectral density 1240PSE page size extensions 1241PSK phase shift keying 1242PSK pre-shared key 1243PSTN public switched telephone network 1244PSW program status word 1245PTE page table entry 1246PTLA pseudo top level aggregator 1247PTP page table page 1248PTV perceived target value 1249PU processing unit 1250PUC personal unblocking code 1251PUN physical unit number 1252PV physical volume 1253PVC permanent virtual circuit 1254PVG physical volume group 1255PVI protected-mode virtual interrupt 1256PVRST Per-VLAN rapid spanning tree 1257PVST Per-VLAN Spanning Tree 1258PWM pulse width modulation 1259PXE preboot execution environment 1260QA quality assurance 1261QAM quadrature amplitude modulation 1262QAM quality assurance management 1263QBE query by example 1264QC quality control 1265QDI quasi delay insensitive 1266QCIF quarter common intermediate format 1267QOS quality of service 1268QVL qualified vendor list 1269R/O read only 1270R/W read/write 1271RA receiver address 1272RA remote assistance 1273RA resource affinity 1274RA router advertisement 1275RAD rapid application development 1276RADIUS remote authentication dial-in user service 1277RAID redundant array of {independent,inexpensive} disks 1278RAM random access memory 1279RAS reliability, availability and serviceability 1280RAS remote access service 1281RAS restartable atomic sequence 1282RAS row address strobe 1283RBF radial basis function 1284RBNF routing backus-naur form 1285RBT red-black tree 1286RC release candidate 1287RC remote control 1288RC run commands 1289RCS Revision Control System 1290RCS revision control system 1291RCU read, copy, update 1292RDB Rigid Disk Block 1293RDBMS relational database management system 1294RDF Resource Description Framework 1295RDM relational data model 1296RDMA remote direct memory access 1297RDP remote desktop protocol 1298RDRAM Rambus DRAM 1299RE regular expression 1300REPL read, evaluate, print, loop 1301REST representational state transfer 1302RF radio frequency 1303RFB remote frame buffer 1304RFI radio frequency interference 1305RFO request for ownership 1306RFU reserved for future use 1307RGB red green blue 1308RGBA red green blue alpha 1309RGMII reduced gigabit media independent interface 1310RH read hit 1311RHEL Red Hat Enterprise Linux 1312RHL Red Hat Linux 1313RIB routing information base 1314RIFF Resource Interchange File Format 1315RIP Raster Image Processor 1316RIP Routing Information Protocol 1317RIR regional Internet registry 1318RISC reduced instruction set {computer,computing} 1319RKM ROM Kernel Manual 1320RLE run length encoding 1321RLL run length limited 1322RLO right-to-left override 1323RM read miss 1324RMCP Remote Management Control Protocol 1325RMI remote method invocation 1326RMO Relaxed Memory Ordering 1327RMPM rapid memory power management 1328RMS root mean square 1329RMW read, modify, write 1330RNG random number generator 1331ROM read only memory 1332RPC remote procedure call 1333RPKI resource PKI 1334RPL requested privilege level 1335RPM revolutions per minute 1336RPN reverse Polish notation 1337RPVST Rapid Per-VLAN Spanning Tree 1338RR random replacement 1339RR round robin 1340RS relay station 1341RSA Rivest, Shamir, [and] Adleman 1342RSIP Realm Specific IP 1343RSN Robust Secure Network 1344RSS really simple syndication 1345RSS residual sum of squares 1346RSTP Rapid Spanning Tree Protocol 1347RT real time 1348RTC real time clock 1349RTC real time computing 1350RTF rich text format 1351RTL register transfer language 1352RTL resistor-transistor logic 1353RTL right to left 1354RTOS real time operating system 1355RTS request to send 1356RTT round trip time 1357RUP rational unified process 1358RW Rabin-Williams 1359RWM read-write memory 1360RX {receive,receiver} 1361S/PDIF Sony/Philips Digital Interface Format 1362SA security advisory 1363SA security association 1364SA source address 1365SA structured analysis 1366SAAS software as a service 1367SABRE Semi-automated business research environment 1368SACD super audio compact disc 1369SAD security association database 1370SAF-TE SCSI accessed fault-tolerant enclosure 1371SAGE Semi-automated ground environment 1372SAL {service,system} abstraction layer 1373SAM serial access memory 1374SAM sum addressed memory 1375SAML security assertion markup language 1376SAN storage area network 1377SAP service access point 1378SAPIC streamlined advanced programmable interrupt controller 1379SASD structured analysis, structured design 1380SASI Shugart Associates System Interface 1381SASL simple authentication [and] security layer 1382SATA serial advanced technology attachment 1383SAX simple API for XML 1384SB sound blaster 1385SBSA server base system architecture 1386SBU standard build unit 1387SC store conditional 1388SCA source code analyzer 1389SCADA supervisory control and data acquisition 1390SCC single chip cloud 1391SCC source code control 1392SCCP skinny call control protocol 1393SCCS Source Code Control System 1394SCI scalable coherent interface 1395SCI system control interrupt 1396SCM software configuration management 1397SCM source code management 1398SCM storage-class memory 1399SCO synchronous connection orientated 1400SCP secure copy 1401SCP system control processor 1402SCPI system control and power interface 1403SCSI Small Computer System Interface 1404SCTP Stream Control Transmission Protocol 1405SDDC software defined data center 1406SDEI software delegated exception interface 1407SDI symbol deinterleave 1408SDK software development kit 1409SDL Simple Declarative Language 1410SDL Simple Direct-media Layer 1411SDLC {software,system,systems} development life cycle 1412SDN software defined networking 1413SDP Session Description Protocol 1414SDR software defined radio 1415SDRAM synchronous dynamic random access memory 1416SDS software defined storage 1417SDT syntax-directed translation 1418SEA synchronous external abort 1419SEGV segmentation violation 1420SED self-encrypting drive 1421SED stream editor 1422SEMB serial ATA enclosure management bridge 1423SEO search engine optimization 1424SES SCSI enclosure services 1425SFC sequential function chart 1426SFI simple firmware interface 1427SFI software fault isolation 1428SFTP SSH File Transfer Protocol 1429SFTP Serial File Transfer Protocol 1430SFTP Simple File Transfer Protocol 1431SGI Silicon Graphics, Inc 1432SGI software generated interrupt 1433SGMII serial gigabit media independent interface 1434SGPIO serial general purpose input/output 1435SGRAM synchronous graphics random access memory 1436SHA secure hash algorithm 1437SICP structure and interpretation of computer programs 1438SIDH supersingular isogeny Diffie-Hellman 1439SIEM security information and event management 1440SIF source input format 1441SIFS short inter-frame space 1442SIM subscriber identity module 1443SIMD single instruction, multiple data 1444SIMM single inline memory module 1445SIP Session Initiation Protocol 1446SIR signal-to-interference ratio 1447SIR slow infrared 1448SISD single instruction, single data 1449SLAAC stateless address auto-configuration 1450SLC single-level cell 1451SLDRAM synchronous-link dynamic random access memory 1452SLED single large expensive disk 1453SLI scalable link interface 1454SLI scan-line interleave 1455SLIC system license internal code 1456SLOC source lines of code 1457SLRU segmented LRU 1458SMA smart memory access 1459SMAF system management action field 1460SMAP Simple Mail Access Protocol 1461SMAP supervisor mode access prevention 1462SMART self-monitoring analysis and reporting technology 1463SMB Server Message Block 1464SMB system management bus 1465SMBIOS System Management BIOS 1466SMC system management controller 1467SMD storage module device 1468SMEP supervisor mode execution protection 1469SMF single mode fiber 1470SMI structure of management information 1471SMI system management interrupt 1472SMM system management mode 1473SMP serial management protocol 1474SMP symmetric multiprocessing 1475SMT simultaneous multithreading 1476SMTP Simple Mail Transfer Protocol 1477SMU system management unit 1478SNA systems network architecture 1479SNAP Sub-Network Access Protocol 1480SNIA Storage Networking Industry Association 1481SNMP Simple Network Management Protocol 1482SNR signal-to-noise ratio 1483SOA service oriented architecture 1484SOAP Simple Object Access Protocol 1485SOC system on chip 1486SOF start of frame 1487SOH start of header 1488SOHO small office/home office 1489SOL serial over LAN 1490SOM system on module 1491SP service pack 1492SP stack pointer 1493SPA storage pool allocator 1494SPAN switched port analyzer 1495SPARC scalable processor architecture 1496SPARQL SPARQL Protocol and RDF Query Language 1497SPD security policy database 1498SPD serial presence detect 1499SPDIF Sony/Philips digital interface format 1500SPI serial peripheral interface 1501SPI stateful packet inspection 1502SPL system interrupt priority level 1503SPL spinlock 1504SPMD single process, multiple data 1505SPR special purpose register 1506SPT sectors per track 1507SQA software quality assurance 1508SQCIF sub quarter common intermediate format 1509SQL Structured Query Language 1510SRAM static random access memory 1511SRC sample rate conversion 1512SRP SCSI RDMA protocol 1513SRR shaped round robin 1514SS self-snoop 1515SS stack segment 1516SSA static single assignment 1517SSAP source service access point 1518SSB single-sideband modulation 1519SSC spread spectrum clock 1520SSD solid state drive 1521SSE streaming SIMD extensions 1522SSFDC solid state floppy disc card 1523SSH secure shell 1524SSI server side includes 1525SSID service set identifier 1526SSL secure sockets layer 1527SSP stack smashing protection 1528STC software thermal control 1529STD state transition diagram 1530STM software transactional memory 1531STOMP Streaming Text Oriented Messaging Protocol 1532STP Spanning Tree Protocol 1533STP shielded twisted pair 1534STRG spanning tree root guard 1535SUN Stanford University Network 1536SUS Single Unix Specification 1537SUT system under test 1538SVC switched virtual circuit 1539SVG scalable vector graphics 1540SVGA Super Video Graphics Array 1541SVI {switch,switched} virtual interface 1542SVM secure virtual machine 1543SVM support vector machine 1544SVR System V Release 1545SVS Separate Virtual Space 1546SWF Shockwave Flash 1547SWIG simplified wrapper [and] interface generator 1548SYR symbol timing recovery 1549TA test assertion 1550TA transmitter address 1551TACACS terminal access controller access-control system 1552TAI international atomic time 1553TAO track at once 1554TAOCP The Art of Computer Programming 1555TAP Test Anything Protocol 1556TAS test and set 1557TB terabyte 1558TBNF transitional backus-naur form 1559TCB trace capture buffer 1560TCB trusted computing base 1561TCC thermal control circuit 1562TCL tool command language 1563TCP Transmission Control Protocol 1564TCQ tagged command queueing 1565TDC time [to] digital converter 1566TDD test-driven development 1567TDD time division duplex 1568TDM time division multiplexing 1569TDMA time division multiple access 1570TDOA time difference of arrival 1571TDP thermal design {point,power} 1572TDR time-domain reflectometry 1573TECO Text Editor and Corrector 1574TFT thin film transistor 1575TFTP Trivial File Transfer Protocol 1576TIAS try it and see 1577TIFF tagged image file format 1578TITS try it to see 1579TK temporal key 1580TKIP Temporal Key Integrity Protocol 1581TLA top level aggregator 1582TLB translation lookaside buffer 1583TLD top level domain 1584TLER time-limited error recovery 1585TLI transport layer interface 1586TLS thread local storage 1587TLS transport layer security 1588TM Turing machine 1589TM thermal monitor 1590TMG transmogrifier 1591TMDS transition minimized differential signaling 1592TMO timeout 1593TOD time of day 1594TOS terms of service 1595TOS trusted operating system 1596TOS type of service 1597TP transaction processing 1598TPI tracks per inch 1599TPM transactions per minute 1600TPM trusted platform module 1601TPR task priority register 1602TPS transactions per second 1603TPS transmission parameters signaling 1604TR task register 1605TR token ring 1606TRL timing recovery loop 1607TRNG true random number generator 1608TS terminal services 1609TS time series 1610TS time stamp 1611TS transport stream 1612TSAN Thread Sanitizer 1613TSC time stamp counter 1614TSD time stamp disable 1615TSDB time series database 1616TSL test, set, lock 1617TSO time sharing option 1618TSO Total Store Ordering 1619TSP Time-Stamp Protocol 1620TSP Tunnel Setup Protocol 1621TSP time synchronization protocol 1622TSP traveling salesman problem 1623TSS task state segment 1624TTL time to live 1625TTL transistor-transistor logic 1626TTM translation table maps 1627TTY teletype 1628TUI {terminal,text-based,textual} user interface 1629TX {transmit out,transmitter} 1630TXG transaction group 1631TZ time zone 1632UAC user {access,account} control 1633UAF use-after-free 1634UART universal asynchronous receiver/transmitter 1635UAT user acceptance testing 1636UB undefined behavior 1637UBSAN Undefined Behavior Sanitizer 1638UC uncacheable 1639UCS uniform-cost search 1640UCS unified computing system 1641UCS universal coded character set 1642UDI uniform driver interface 1643UDMA ultra DMA 1644UDO ultra density optical 1645UDP User Datagram Protocol 1646UEFI unified extensible firmware interface 1647UFS Unix File System 1648UGA universal graphics adapter 1649UI unit interval 1650UI user interface 1651UICC universal integrated circuit card 1652UID unique identifier 1653UID user identifier 1654UL upload 1655UMA uniform memory access 1656UMA upper memory area 1657UMB upper memory block 1658UML unified modeling language 1659UMPC ultra-mobile PC 1660UPNP universal plug and play 1661UPS uninterruptible power supply 1662URI uniform resource identifier 1663URL uniform resource locator 1664URN uniform resource name 1665USART universal synchronous/asynchronous receiver/transmitter 1666USB universal serial bus 1667USWC uncacheable speculative write combining 1668UT unit test 1669UTC coordinated universal time 1670UTF unicode transformation formats 1671UTP unshielded twisted pair 1672UTS UNIX time-sharing 1673UUCP Unix-to-Unix Copy Protocol 1674UUID universally unique identifier 1675UUOC useless use of cat 1676UUT unit under test 1677UX user experience 1678VA vertical alignment 1679VA virtual address 1680VA volt-ampere 1681VAX virtual address extension 1682VB Visual Basic 1683VCA variable-gain amplifier 1684VCC common collector voltage 1685VCCP virtual chassis control protocol 1686VCF voltage-controlled filter 1687VCM virtual channel memory 1688VCO voltage-controlled oscillator 1689VCP virtual chassis port 1690VCS version control system 1691VDPAU Video Decode and Presentation API for Unix 1692VES virtual execution system 1693VESA Video Electronics Standards Association 1694VFO variable-frequency oscillator 1695VFS virtual file system 1696VG volume group 1697VGA Video Graphics Array 1698VHDCI very high density cable interconnect 1699VID {VLAN,voltage level} identifier 1700VIM Vi IMproved 1701VIPT virtually indexed, physically tagged 1702VIVT virtually indexed, virtually tagged 1703VLAN virtual local area network 1704VLD variable-length decoding 1705VLIW very long instruction word 1706VLSI very large scale integration 1707VLSM variable length subnet mask 1708VM virtual {machine,memory} 1709VME virtual mode extension 1710VMX vector multimedia extensions 1711VMX virtual machine extensions 1712VNC virtual network computing 1713VOD video on demand 1714VPD vital product data 1715VPN virtual private network 1716VPWS virtual private wire service 1717VR virtual reality 1718VRAM video random access memory 1719VRF virtual routing and forwarding 1720VRM voltage regulator module 1721VROC Virtual RAID On CPU 1722VRRP Virtual Router Redundancy Protocol 1723VSTP VLAN Spanning Tree Protocol 1724VTP VLAN Trunking Protocol 1725VXFS Veritas file sytem 1726VXVM Veritas volume manager 1727W watt 1728W3C World Wide Web Consortium 1729WAFL write anywhere file layout 1730WAMP Web Application Messaging Protocol 1731WAN wide area network 1732WAP Wireless Application Protocol 1733WAP wireless access point 1734WDM Windows Driver Model 1735WDDM Windows Display Driver Model 1736WDT watchdog timer 1737WEP Wired Equivalent Privacy 1738WFI wait for interrupt 1739WFQ weighted fair queuing 1740WH write hit 1741WHEA Windows hardware error architecture 1742WIFI wireless fidelity 1743WLAN wireless local area network 1744WM write miss 1745WMI Windows Management Instrumentation 1746WOL Wake-on-LAN 1747WOM Wake-on-Modem 1748WOR Wake-on-Ring 1749WORM write once read many 1750WP WordPerfect 1751WP word processor 1752WP write protect 1753WPA Wi-Fi Protected Access 1754WPA2 Wi-Fi Protected Access II 1755WPAD web proxy auto-discovery protocol 1756WPS Wi-Fi Protected Setup 1757WRAM window random access memory 1758WS web services 1759WTC write through caching 1760WTD weighted tail drop 1761WWAN wireless wide area network 1762WWW world wide web 1763WYSIAYG what you see is all you get 1764WYSIWYG what you see is what you get 1765XBAR crossbar 1766XDMCP X Display Manager control protocol 1767XER XML encoding rules 1768XGA Extended Graphics Array 1769XHR XMLHttpRequest 1770XIP execute in place 1771XML Extensible Markup Language 1772XNA XNA's not acronymed 1773XNS Xerox network systems 1774XOR exclusive or 1775XP extreme programming 1776XSI X/Open System Interface 1777XSL extensible stylesheet language 1778XSLT extensible stylesheet language transformations 1779XSS cross site scripting 1780XT extended technology 1781XTACACS extended terminal access controller access-control system 1782XTI X/Open transport interface 1783XUL XML user interface language 1784YACC yet another compiler compiler 1785YAML YAML ain't markup language 1786YANG yet another next generation 1787YAWPFAPR you are welcome; please file a problem report 1788YP Yellow Pages 1789YTD year to date 1790ZAP ZFS attribute processor 1791ZBR zone bit recording 1792ZFOD zero-filled on demand 1793ZFS zettabyte file system 1794ZIF zero insertion force 1795ZIFS zero insertion force socket 1796ZIL ZFS intent log 1797ZMA zone multicast address 1798ZOI zero one infinity 1799ZOI zone of influence 1800ZPL ZFS Posix layer 1801ZVOL ZFS Volume 1802