acronyms.comp revision 1.295
1$NetBSD: acronyms.comp,v 1.295 2019/12/01 23:08:09 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 244CIA confidentiality, integrity, availability 245CIDR Classless Inter-Domain Routing 246CIF common intermediate format 247CIFS Common Internet File System 248CIL common intermediate language 249CIR carrier-to-interference ratio 250CIS contact image sensor 251CISC complex instruction set {computer,computing} 252CJK Chinese, Japanese, [and] Korean 253CLF common log format 254CLI command line interface 255CLI common language infrastructure 256CLR common language runtime 257CLS common language specification 258CLTT closed loop thermal throttling 259CLUT color look-up table 260CLV constant linear velocity 261CM configuration management 262CMA concert multithread architecture 263CMC chassis management controller 264CMC corrected machine check 265CMS {configuration,content,course} management system 266CMI control {management,method} interface 267CMOS complementary metal-oxide-semiconductor 268CMP chip multi-processing 269CMS content management system 270CMYK cyan magenta yellow black 271CN {common,canonical} name 272CNC computer numerical control 273CNR carrier-to-noise ratio 274COA change of authority 275COF current operating frequency 276COFDM coded orthogonal frequency division multiplexing 277COFF common object file format 278COM component object model 279COM computer on module 280COMA cache-only memory architecture 281CORBA common object request broker architecture 282COS class of service 283COW copy-on-write 284CP continuous pilot 285CPB core performance boost 286CPC central processor complex 287CPC cpu performance counters 288CPE common phase error 289CPE common platform enumeration 290CPER common platform error record 291CPG clock pulse generator 292CPI cycles per instruction 293CPL current privilege level 294CPLD complex programmable logic device 295CPP C preprocessor 296CPS characters per second 297CPS continuation-passing style 298CPT command pass through 299CPU central processing unit 300CR carriage return 301CRC cyclic redundancy check 302CRL carrier recovery loop 303CRLF carriage return line feed 304CSU C start up 305CRT cathode ray tube 306CRUD create, read, update, and delete 307CS cable select 308CS chip select 309CS code segment 310CS computer science 311CSDL {common,conceptual} schema definition language 312CSI channel state information 313CSI common system interface 314CSMA carrier sense multiple access 315CSMA/CA carrier sense multiple access with collision avoidance 316CSMA/CD carrier sense multiple access with collision detection 317CSP communicating sequential processes 318CSP content security policy 319CSP constrain satisfaction problems 320CSP cryptographic service provider 321CSR control [and] status registers 322CSRG Computer Systems Research Group 323CSS cascading style sheets 324CST common spanning tree 325CSV comma-separated values 326CTF compact c type format 327CTM close to metal 328CTR counter [mode] 329CTS clear to send 330CTS common type system 331CUA common user access 332CUT coordinated universal time 333CV control voltage 334CVE common vulnerabilities and exposures 335CVS Concurrent Versions System 336DA destination address 337DAA distributed application architecture 338DAAP digital audio access protocol 339DAB digital audio broadcasting 340DAC digital [to] analog converter 341DAC discretionary access control 342DAD duplicate address detection 343DANE DNS-based Authentication of Named Entities 344DAO disk at once 345DAP Directory Access Protocol 346DAT digital audio tape 347DAT dynamic acceleration technology 348DB database 349DBA database administrator 350DBA dynamic bandwidth allocation 351DBB data bus buffer 352DBC design by contract 353DBL dynamic buffer limiting 354DBMS database management system 355DBS database server 356DC direct current 357DCC Direct Client-to-Client 358DCC direct cable connect 359DCD data carrier detect 360DCE data control equipment 361DCE distributed computing environment 362DCIM data center infrastructure management 363DCIM digital camera images 364DCL Digital Command Language 365DCOM distributed component object model 366DCOP Desktop COmmunication Protocol 367DCS data collection systems 368DCT discrete cosine transform 369DCU data cache unit 370DDC display data channel 371DDE dynamic data exchange 372DDI device drivers interface 373DDK device driver kit 374DDL data description language 375DDR double data rate 376DDS direct digital sound 377DDWG Digital Display Working Group 378DE debugging extensions 379DE desktop environment 380DEA data encryption algorithm 381DEC Digital Equipment Corporation 382DEK data encryption key 383DEP data execution prevention 384DER distinguished encoding rules 385DES Data Encryption Standard 386DF don't fragment 387DFA deterministic finite automaton 388DFC data flow control 389DFS depth first search 390DFS distributed file system 391DFSAN Data Flow Sanitizer 392DFT diagnostic function test 393DFT discrete Fourier transform 394DGL data generation language 395DH Diffie-Hellman 396DHCP Dynamic Host Configuration Protocol 397DIA dedicated Internet access 398DIFS distributed inter-frame space 399DIMM dual inline memory module 400DIRT design in real time 401DKI driver/kernel interface 402DL diode logic 403DL discrete logarithm 404DL download 405DLCI data link connection identifier 406DLE data link escape 407DLL dynamic link library 408DLNA digital living network alliance 409DLP discrete logarithm problem 410DMA direct memory access 411DMI desktop management interface 412DMS document management system 413DMT discrete multitone modulation 414DMU data management layer 415DNARD Digital network appliance reference design 416DND drag and drop 417DNLC directory name lookup cache 418DNS Domain Name System 419DNSSEC DNS Security Extensions 420DOE distributed object environment 421DOF data over fibre 422DOM document object model 423DOS denial of service 424DOS disk operating system 425DP DisplayPort 426DPC deferred procedure call 427DPCM differential pulse code modulation 428DPD dead peer detection 429DPI deep packet inspection 430DPI dots per inch 431DPL descriptor privilege level 432DPS Display PostScript 433DPST display power savings technology 434DRAAS disaster recovery as a service 435DRAM dynamic random access memory 436DRBG deterministic random bit generator 437DRI direct rendering infrastructure 438DRM digital rights management 439DRRS display refresh rate switching 440DS debug store 441DS differentiated services 442DSA digital signature algorithm 443DSAP destination service access point 444DSB double-sideband modulation 445DSCP differentiated services code point 446DSDT differentiated system descriptor table 447DSF device special file 448DSL dataset and snapshot layer 449DSL digital subscriber line 450DSL domain specific language 451DSLAM digital subscriber line access multiplexer 452DSN delivery status notification 453DSO dynamic shared object 454DSP digital signal processor 455DSSS direct sequence spread spectrum 456DTB device tree blob 457DTC device tree compiler 458DTD document type definition 459DTE data terminal equipment 460DTE dumb terminal emulator 461DTL diode-transistor logic 462DTLS datagram transport layer security 463DTS device tree source 464DTS digital thermal sensor 465DUT device under test 466DVB digital video broadcasting 467DVCS distributed version control system 468DVD digital versatile disc 469DVFS dynamic voltage and frequency scaling 470DVI device independent 471DVI Digital Visual Interface 472DVR digital video recorder 473E-XER extended XML encoding rules 474EABI embedded-application binary interface 475EAI Email Address Internationalization 476EAI Enterprise Application Integration 477EAP Extensible Authentication Protocol 478EAPOL EAP over Lan 479EAV entity-attribute-value model 480EAV ethernet audio/video bridging 481EBCDIC Extended Binary Coded Decimal Interchange Code 482EBDA Extended BIOS Data Area 483EBNF extended backus-naur form 484EBR extended boot record 485EC elliptic curve 486ECC elliptic curve cryptography 487ECC error correction code 488ECDH elliptic curve Diffie-Hellman 489ECDL elliptic curve discrete logarithm 490ECDLP elliptic curve discrete logarithm problem 491ECDSA elliptic curve digital signature algorithm 492ECL emitter-coupled logic 493ECN explicit congestion notification 494ECP enhanced capability port 495ECS enhanced chip set 496ECS extended configuration space 497EDAC error detection and correction 498EDAT enhanced dynamic acceleration technology 499EdDSA Edwards curve digital signature algorithm 500EDGE explicit data graph execution 501EDID extended display identification data 502EDO extended data out 503EDS electronical data sheet 504EDSAC electronic delay storage automatic calculator 505EDVAC electronic discrete variable automatic computer 506EEE energy efficient ethernet 507EEPROM electrically erasable programmable read only memory 508EFI extensible firmware interface 509EFL emitter follower logic 510EFM eight to fourteen modulation 511EFS extent file system 512EGA Enhanced Graphics Adapter 513EGP exterior gateway protocol 514EH extension header 515EIDE enhanced IDE 516EISA extended industry standard architecture 517EINJ error injection table 518ELF executable and linking format 519ELS entry level system 520EMI electro-magnetic interference 521EMP electro-magnetic pulse 522EMR electro-magnetic radiation 523EMACS Editor MACroS 524ENIAC electronic numerical integrator and computer 525EOF end of file 526EOI end of interrupt 527EOIS end of interactive support 528EOL end of life 529EOL end of line 530EOT end of transmission 531EPIC explicitly parallel instruction computing 532EPP enhanced parallel port 533EPRML extended partial response, maximum likelihood 534EPROM erasable programmable read only memory 535ERC error recovery control 536ERD emergency recovery disk 537ERD entity relationship diagram 538ERE extended regular expression 539ERST error record serialization table 540ESAN Efficiency Sanitizer 541ESB enterprise service bus 542ESDI enhanced small disk interface 543ESDRAM enhanced synchronous dynamic random access memory 544ESI enclosure services interface 545ESS electronic switching system 546ESS extended service set 547ESSID extended service set identifier 548EST enhanced speedstep 549ETL extract, transform, load 550EU execution unit 551EULA end user license agreement 552FAT file allocation table 553FBRAM frame buffer random access memory 554FCIF full common intermediate format 555FCL fiber channel loop 556FCS frame check sequence 557FDC floppy disk controller 558FDD floppy disk drive 559FDDI fiber distributed data interface 560FDE full disk encryption 561FDT flattened device tree 562FEA finite element analysis 563FEC forward error correction 564FET field-effect transistor 565FF finite field 566FF form feed 567FFDH finite-field Diffie-Hellman 568FFH functional fixed hardware 569FFI foreign function interface 570FFM focus follows mouse 571FFS Fast File System 572FFS find first set 573FFT fast Fourier transform 574FG floating gate 575FHSS frequency hop spread spectrum 576FID frequency identifier 577FIFO first in, first out 578FILO first in, last out 579FIPS Federal Information Processing Standards 580FIR fast infrared 581FLOPS floating [point] operations per second 582FLOSS free/libre/open source software 583FM frequency modulation 584FMR false match rate 585FOSS free/open source software 586FPGA field programmable gate array 587FPM fast page mode 588FPR floating point register 589FPU floating point unit 590FQDN fully qualified domain name 591FRR false rejection rate 592FRU field replaceable unit 593FS file system 594FSB front side bus 595FSCK file system check 596FSF Free Software Foundation 597FSK frequency shift keying 598FSM finite-state machine 599FTA fault tree analysis 600FTL flash translation layer 601FTP File Transfer Protocol 602FTPS File Transfer Protocol Secure 603FUS fast user switching 604FWH firmware hub 605FWS folding white space 606GAL generic array logic 607GARP generic attribute registration protocol 608GAS generic address structure 609GC garbage collector 610GCM Galois counter mode 611GCR group-coded recording 612GDI Graphics Device Interface 613GDT global descriptor table 614GECOS general comprehensive operating supervisor 615GEM graphics environment manager 616GEM graphics execution manager 617GENA general event notification architecture 618GHC Glasgow Haskell compiler 619GHES generic hardware error source 620GIC generic interrupt controller 621GID group identifier 622GIF graphics interchange format 623GMCH graphics and memory controller hub 624GNU GNU's Not Unix 625GOP graphics output protocol 626GOT global offset table 627GPE general purpose event 628GPF general protection fault 629GPG GNU Privacy Guard 630GPL [GNU] General Public License 631GPR general purpose register 632GPS generalized processor sharing 633GPT GUID partition table 634GPU graphics processing unit 635GR golden ratio 636GRE generic routing encapsulation 637GSI global system interrupt 638GUI graphical user interface 639GUID globally unique identifier 640GVFS git virtual file system 641HA high availability 642HAL hardware abstraction layer 643HAT hashed array tree 644HATEOAS hypermedia as the engine of application state 645HBA host bus adapter 646HCF halt and catch fire 647HCI host controller interface 648HCI human-computer interaction 649HCL hardware compatibility list 650HDCP High-bandwidth Digital Content Protection 651HDD hard disk drive 652HDL hardware description language 653HDMI High-Definition Multimedia Interface 654HDTV high-definition television 655HECI host embedded controller interface 656HEST hardware error source table 657HEVC high efficiency video coding 658HF high frequency 659HFM highest frequency mode 660HFS hierarchical file system 661HID human interface device 662HKP HTTP Keyserver Protocol 663HLL high-level language 664HMA high memory area 665HMI human-machine interface 666HOOD hierarchical object oriented design 667HP Hewlett-Packard 668HPC high performance computing 669HPET high precision event timer 670HSM hardware security module 671HSM hierarchical storage management 672HT hyper-threading 673HTC hardware thermal control 674HTCC high temperature co-fired ceramic 675HTML HyperText Markup Language 676HTT hyper-threading technology 677HTTP Hypertext Transfer Protocol 678HTTPS Hypertext Transfer Protocol Secure 679HVM hardware virtual machine 680HVDS High-Voltage Differential Signaling 681HWASAN Hardware-assisted Address Sanitizer 682HZ Hertz 683I2O intelligent input/output 684IA information assurance 685IAAS infrastructure as a service 686IANA Internet Assigned Numbers Authority 687IBC iterated block cipher 688IBM International Business Machines 689IBPI international blinking pattern interpretation 690IBS instruction based sampling 691IBSS independent basic service set 692IC integrated circuit 693ICA independent computer architecture 694ICACLS integrity control access control lists 695ICB Internet Citizen's Band 696ICE in-circuit emulator 697ICE internal compiler error 698ICH I/O controller hub 699ICMP Internet Control Message Protocol 700ICT information and communications technology 701ICW initialization command word 702IDA Intel dynamic acceleration 703IDCMP Intuition direct communication message port 704IDCT inverse discrete cosine transform 705IDE integrated development environment 706IDE integrated drive electronics 707IDPS intrusion detection [and] prevention system 708IDRP inter-domain routing protocol 709IDS intrusion detection system 710IDT interrupt descriptor table 711IE Internet Explorer 712IEC International Electrotechnical Commission 713IEEE Institute of Electrical and Electronics Engineers 714IESG Internet Engineering Steering Group 715IETF Internet Engineering Task Force 716IF intermediate frequency 717IFCM isochronous flow control mode 718IFF Interchange File Format 719IFS internal field separator 720IGD Internet gateway device 721IGMP Internet Group Management Protocol 722IGP interior gateway protocol 723IHV independent hardware vendor 724IKE Internet key exchange 725ILM internal loopback mode 726ILOM integrated lights-out management 727ILP instruction level parallelism 728IM instant messaging 729IMAP Internet Message Access Protocol 730IMC integrated memory controller 731IMCR interrupt mode configuration register 732IMR interrupt mask register 733IMS information management system 734IMSI international mobile subscriber identity 735INCITS InterNational Committee for Information Technology Standards 736INODE index node 737IO input/output 738IOCTL input/output control 739IOM input/output managers 740IOMMU input/output memory management unit 741IOT Internet of Things 742IP Internet Protocol 743IP intellectual property 744IPC instructions per cycle 745IPC interprocess communication 746IPCF interprocess communication facility 747IPE integrated programming environment 748IPI intelligent peripheral interface 749IPI interprocessor interrupt 750IPL Initial Program Load 751IPL Interrupt Priority Level 752IPMB Intelligent Platform Management Bus 753IPMI Intelligent Platform Management Interface 754IPNG Internet Protocol, Next Generation 755IPS in-plane switching 756IPS intrusion prevention system 757IPSEC Internet Protocol Security 758IRC Internet Relay Chat 759IRDA infrared data association 760IRDP ICMP Router Discovery Protocol 761IRQ interrupt request 762IRQL interrupt request level 763IRR interrupt request register 764IRTF Internet Research Task Force 765IS information system 766ISA industry standard architecture 767ISA instruction set architecture 768ISE instant secure erase 769ISDN integrated services digital network 770ISI inter-symbol interference 771ISL initial system load 772ISM industrial, scientific, [and] medical 773ISMS information system management system 774ISN initial serial number 775ISO International Standards Organization 776ISOC Internet Society 777ISP Internet service provider 778ISR in-service register 779ISR interrupt service routine 780IST internal spanning tree 781IST interrupt stack table 782ISV independent software vendor 783IT information technology 784ITB Intel Turbo Boost 785ITIL information technology infrastructure library 786ITP in-target probe 787ITSM IT service management 788IV initialization vector 789IVT interrupt vector table 790JBOD just a bunch of disks 791JCL Job Control Language 792JFET junction [gate] field-effect transistor 793JIT just in time 794JPEG Joint Photographic Experts Group 795JRE Java Runtime Environment 796JSON JavaScript Object Notation 797JTAG joint test action group 798KASLR kernel address space layout randomization 799KB keyboard 800KB kilobyte 801KBD keyboard 802KBD kilobaud 803KCS keyboard controller style 804KLOC thousand lines of code 805KMS kernel-mode setting 806KPI kernel programming interface 807KVA kernel virtual address 808KVM kernel virtual machine 809KVM kernel virtual memory 810KVM keyboard, video, [and] mouse 811L2CAP link layer control and adaptation protocol 812LAMP Linux Apache MySQL {Perl,PHP,Python} 813LAN local area network 814LAPIC local advanced programmable interrupt controller 815LAR load access rights 816LBA logical block addressing 817LBNF labeled backus-naur form 818LBS location-based service 819LCD liquid crystal display 820LCP link control protocol 821LDA local delivery agent 822LDAP Lightweight Directory Access Protocol 823LDR light-dependent resistor 824LDT local descriptor table 825LE logical extent 826LED light emitting diode 827LELL low energy link layer 828LER label edge router 829LF line feed 830LF low frequency 831LFM lowest frequency mode 832LFN long file names 833LFO low-frequency oscillation 834LFS log-structured file system 835LFU least frequently used 836LHP loop heat pipe 837LIF logical interchange format 838LIFO last in, first out 839LILO LInux LOader 840LILO last in, last out 841LINT local interrupt 842LIR local Internet registry 843LISP LISt Processor 844LISP Locator/ID Separation Protocol 845LKM {Linux,loadable} kernel module 846LKML Linux kernel mailing list 847LL load linked 848LL/SC load linked/store conditional 849LLC logical link control 850LLD low-level design 851LLDD low-level design document 852LLDP link layer discovery protocol 853LLF low level format 854LLMNR link-local multicast name resolution 855LLVM Low Level Virtual Machine 856LM long mode 857LMCE local machine check exception 858LMI local management interface 859LMM link management mode 860LMP link management protocol 861LNO loop nest optimization 862LOC lines of code 863LOM lights-out management 864LPE Linux performance events 865LPC low pin count 866LPS local positioning system 867LRC longitudinal redundancy check 868LRM left-to-right mark 869LRO left-to-right override 870LRU least recently used 871LS link state 872LSAN Leak Sanitizer 873LSB Linux standards base 874LSB least significant {bit,byte} 875LSI large scale integration 876LSL load segment limit 877LSM log structured merge 878LSN Large Scale NAT 879LSN log sequence number 880LSR label switch router 881LTCC low temperature co-fired ceramic 882LTO linear tape-open 883LTO link time optimization 884LTR left to right 885LTR load task register 886LTR letter(-sized paper) 887LTS long term support 888LUA Lua Uppercase Accident 889LUN logical unit number 890LV logical volume 891LVM logical volume management 892LVT local vector table 893LVDS Low-Voltage Differential Signaling 894LWP light-weight process 895LZSS Lempel Ziv Storer Szymanski 896LZW Lempel Ziv Welch 897MAB MAC authentication bypass 898MAC mandatory access control 899MAC {media,medium} access control 900MAC message authentication {check,code} 901MADT multiple APIC descriptor table 902MAMR microwave-assisted magnetic recording 903MB megabyte 904MBA multi-boot agent 905MBR master boot record 906MBS megabits per second 907MC memory controller 908MCA machine check architecture 909MCA MicroChannel architecture 910MCC multiversion concurrency control 911MCE machine check exception 912MCGA Multi-Color Graphics Array 913MCH memory controller hub 914MCLAG multi-chassis link aggregation 915MCM multi-chip module 916MCQ memory controlled queue 917MD machine-dependent 918MD-SAL model-driven service abstraction layer 919MDA mail delivery agent 920MDA Monochrome Display Adapter 921MDC Management Data Clock 922MDI Medium Dependent Interface 923MDI-X Medium Dependent Interface Crossover 924MDIO Management Data Input/Output 925MDMX MIPS Digital Media eXtension 926MDRAM multibank dynamic random access memory 927MESI modified, exclusive, shared, invalid 928MFC merge from current 929MFC Microsoft Foundation Classes 930MFM modified frequency modulation 931MFU most frequently used 932MGCP media gateway control protocol 933MHU message handling unit 934MI machine-independent 935MI machine interface 936MIB management information base 937MIC message integrity {check,code} 938MID mobile Internet device 939MIDI musical instrument digital interface 940MIF management information format 941MII media independent interface 942MIM man in the middle 943MIMD multiple instruction, multiple data 944MIME Multipurpose Internet Mail Extensions 945MIMO multiple input multiple output 946MIPS million instructions per second 947MIPS Microprocessor without Interlocked Pipeline Stages 948MISD multiple instruction, single data 949MIT Massachusetts Institute of Technology 950MITM man in the middle 951ML machine language 952ML machine learning 953ML mailing list 954ML markup language 955ML maximum likelihood 956MLC multi-level cell 957MLD multicast listener discovery 958MLHP micro loop heat pipe 959MMF multi-mode fiber 960MMIC monolithic microwave integrated circuit 961MMIO memory mapped input/output 962MMORPG massive multiplayer online role playing game 963MMRP multiple MAC registration protocol 964MMU memory management unit 965MMX matrix math extension 966MMX multimedia extension 967MMX multiple math extension 968MO magneto-optical 969MOESI modified, owned, exclusive, shared, invalid 970MOF maximum operating frequency 971MOSFET metal-oxide-semiconductor field-effect transistor 972MOSI modified, owned, shared, invalid 973MP multi-platform 974MP multiplayer 975MP {multiprocessing,multiprocessor} 976MPEG moving picture experts group 977MPI message passing interface 978MPLS Multiprotocol Label Switching 979MPP massively parallel processor 980MPS memory pool system 981MPS multiprocessor specification 982MQTT Message Queuing Telemetry Transport 983MR modem ready 984MRO method resolution order 985MRP multiple registration protocol 986MRU most recently used 987MS Microsoft 988MSAN Memory Sanitizer 989MSB most significant {bit,byte} 990MSC message sequence chart 991MSE mean square error 992MSF minutes seconds frames 993MSI message signaled interrupt 994MSI modified, shared, invalid 995MSR {machine state,model-specific} register 996MSS maximum segment size 997MSTP Multiple Spanning Tree Protocol 998MT machine translation 999MTA mail transfer agent 1000MTBF mean time between failures 1001MTP media transfer protocol 1002MTRR memory type range register 1003MTTF mean time to failure 1004MTU maximum transmission unit 1005MUA mail user agent 1006MUD multi-user domain 1007MVCC multiversion concurrency control 1008MVR multicast VLAN registration 1009MVRP multiple VLAN registration protocol 1010MWE module width encoding 1011MX mail exchange 1012NACK negative acknowledgement 1013NAK negative acknowledgement 1014NAN neighbor awareness networking 1015NAN not a number 1016NAPT Network Address Port Translation 1017NAS network attached storage 1018NAT network address translation 1019NAV network allocation vector 1020NC numerical control 1021NC-SI network controller sideband interface 1022NCO numerically-controlled oscillator 1023NCP Network Control Protocol 1024NCSI network connectivity status indicator 1025NCQ native command queuing 1026ND neighbor discovery 1027NDFA nondeterministic finite automaton 1028NDIS network driver interface specification 1029NE numeric error 1030NEWS Network extensible Window System 1031NFA nondeterministic finite automaton 1032NFC near-field communication 1033NFCI no functional change intended 1034NFS network file system 1035NFV network function virtualization 1036NIA next instruction address 1037NIC network information center 1038NIC network interface card 1039NIDS network intrusion detection system 1040NIP network interface protocol 1041NIPS network intrusion prevention system 1042NIS network information service 1043NIST National Institute of Standards and Technology 1044NLS native language support 1045NMI non-maskable interrupt 1046NNTP Network News Transfer Protocol 1047NOC network operations center 1048NOP no operation 1049NOS network operating system 1050NP nondeterministic polynomial time 1051NRND not recommended for new designs 1052NRZ non-return to zero 1053NSA nation-state adversary 1054NSA no such agency 1055NSA National Security Agency 1056NTM non-deterministic Turing machine 1057NTP Network Time Protocol 1058NUMA non-uniform memory access 1059NURBS non-uniform rational basis spline 1060NVMM NetBSD Virtual Machine Monitor 1061NVMM non-volatile main memory 1062NVRAM non-volatile random access memory 1063NW not write-through 1064NX no execute 1065OAEP optimal asymmetric encryption padding 1066OAM operations, administration, and {management,maintenance} 1067OBO off by one 1068OBOE off by one error 1069OCL object constraint language 1070OCR optical character recognition 1071ODE offline device environment 1072ODI open data-link interface 1073ODM object data manager 1074ODCM on-demand clock modulation 1075ODT on-die termination 1076OEM original equipment manufacturer 1077OFB output feedback 1078OFDM orthogonal frequency division multiplexing 1079OFET organic field-effect transistor 1080OLAP online analytical processing 1081OLE object linking and embedding 1082OLTP online transaction processing 1083ONFI open nand flash interface 1084OO OpenOffice 1085OO object oriented 1086OOB out of band 1087OOE out of order execution 1088OOM out of memory 1089OOO OpenOffice.org 1090OOP object oriented programming 1091OOPS object oriented programming systems 1092OOSE object oriented software engineering 1093OPM operations per minute 1094OPS operations per second 1095OQL Object Query Language 1096ORB object request broker 1097ORM object-relational mapping 1098OS operating system 1099OSD object-based storage device 1100OSD open source definition 1101OSF open software foundation 1102OSI Open Source Initiative 1103OSI open systems interconnection 1104OSPF open shortest path first 1105OSPM OS power management 1106OSS open sound system 1107OSS open source software 1108OSVW operating system visible workarounds 1109OTP one time password 1110OTP open telecom platform 1111OU organizational unit 1112OUI organizationally unique identifier 1113OWL Web Ontology Language 1114P2P PCI to PCI 1115P2P peer to peer 1116PA phase accumulator 1117PA physical address 1118PAAS platform as a service 1119PAC phase-amplitude converter 1120PAE physical address extension 1121PAGP port aggregation protocol 1122PAL phase alternating line 1123PAL programmable array logic 1124PAM pluggable authentication modules 1125PAM pulse amplitude modulation 1126PAP password authentication protocol 1127PAT page attribute table 1128PAT port address translation 1129PATA parallel ATA 1130PAX portable archive exchange 1131PBE pending break encoding 1132PBE programming by example 1133PC personal computer 1134PC program counter 1135PCB printed circuit board 1136PCB process control block 1137PCB Protocol Control Block 1138PCC Portable C Compiler 1139PCD page-level cache disable 1140PCE path computation element 1141PCE performance-monitor counter enable 1142PCEP Path Computation Element Protocol 1143PCH platform controller hub 1144PCI peripheral component interconnect 1145PCM phase change memory 1146PCM pulse code modulation 1147PCMCIA Personal Computer Memory Card International Association 1148PCP Port Control Protocol 1149PD public domain 1150PDA personal digital assistant 1151PDA pushdown automaton 1152PDAG propositional directed acyclic graph 1153PDB power distribution board 1154PDF portable document format 1155PDM pulse-duration modulation 1156PDN pull-down network 1157PDP page {descriptor,directory} page 1158PDS product data sheet 1159PDU protocol data unit 1160PE protection enable 1161PE provider edge 1162PEAP Protected EAP 1163PECI platform environment control interface 1164PEP protocol extension protocol 1165PER packed encoding rules 1166PFS perfect forward secrecy 1167PGAS partitioned global address space 1168PGE page global enable 1169PGP Pretty Good Privacy 1170PHB PCI host bridge 1171PHP PHP: Hypertext Preprocessor 1172PIC performance instrumentation counters 1173PIC position independent code 1174PIC programmable interrupt controller 1175PICNIC problem in chair, not in computer 1176PID process id 1177PIE position independent executable 1178PIL Priority Interrupt Level 1179PIM personal information manager 1180PIM platform-independent model 1181PIO programmed input/output 1182PIPT physically indexed, physically tagged 1183PIQ prefetch input queue 1184PIT programmable interrupt timer 1185PIV personal identity verification 1186PIX Private Internet eXchange 1187PKCS public-key cryptography standards 1188PKI public key infrastructure 1189PLC programmable logic controller 1190PLD programmable logic device 1191PLL phase locked loop 1192PLRU pseudo LRU 1193PLTM package level thermal management 1194PM power management 1195PM {phase,pulse} modulation 1196PMC performance monitoring counters 1197PME power management event 1198PMEG page map entry group 1199PMI performance monitoring infrastructure 1200PMI platform management interrupt 1201PMIC power management integrated circut 1202PMIO port-mapped input/output 1203PMT photo-multiplier tube 1204PMU performance monitoring units 1205PMU power management unit 1206PNG portable network graphics 1207PNP plug and play 1208POE power over ethernet 1209POF probability of failure 1210POP Post Office Protocol 1211POP power on password 1212POR plan of record 1213POSIX Portable Operating System Interface [for Unix] 1214POST power on self test 1215POTS plain old telephone system 1216POWER Performance Optimization With Enhanced RISC 1217POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1218PP pair programming 1219PPB PCI [to] PCI bridge 1220PPC PowerPC 1221PPC Power Performance Computing 1222PPI pixels per inch 1223PPM pages per minute 1224PPP Point-to-Point Protocol 1225PPPOA Point-to-Point Protocol over ATM 1226PPPOE Point-to-Point Protocol over Ethernet 1227PPR processor programming reference 1228PPT powerpoint 1229PPT punched paper tape 1230PPU physics processing unit 1231PRAM Parameter RAM 1232PRBS pseudorandom bit sequence 1233PRG pseudorandom generator 1234PRF pseudorandom function [family] 1235PRML partial response, maximum likelihood 1236PRN pseudorandom {noise,number} 1237PRNG pseudorandom number generator 1238PROM programmable read only memory 1239PRP pseudorandom permutation 1240PRU Programmable Realtime Unit 1241PS PostScript 1242PSD power spectral density 1243PSE page size extensions 1244PSK phase shift keying 1245PSK pre-shared key 1246PSTN public switched telephone network 1247PSW program status word 1248PTE page table entry 1249PTLA pseudo top level aggregator 1250PTP page table page 1251PTV perceived target value 1252PU processing unit 1253PUC personal unblocking code 1254PUN physical unit number 1255PV physical volume 1256PVC permanent virtual circuit 1257PVG physical volume group 1258PVI protected-mode virtual interrupt 1259PVRST Per-VLAN rapid spanning tree 1260PVST Per-VLAN Spanning Tree 1261PWM pulse width modulation 1262PXE preboot execution environment 1263QA quality assurance 1264QAM quadrature amplitude modulation 1265QAM quality assurance management 1266QBE query by example 1267QC quality control 1268QDI quasi delay insensitive 1269QCIF quarter common intermediate format 1270QOS quality of service 1271QVL qualified vendor list 1272R/O read only 1273R/W read/write 1274RA receiver address 1275RA remote assistance 1276RA resource affinity 1277RA router advertisement 1278RAD rapid application development 1279RADIUS remote authentication dial-in user service 1280RAID redundant array of {independent,inexpensive} disks 1281RAM random access memory 1282RAS reliability, availability and serviceability 1283RAS remote access service 1284RAS restartable atomic sequence 1285RAS row address strobe 1286RBF radial basis function 1287RBNF routing backus-naur form 1288RBT red-black tree 1289RC release candidate 1290RC remote control 1291RC run commands 1292RCS Revision Control System 1293RCS revision control system 1294RCU read, copy, update 1295RDB Rigid Disk Block 1296RDBMS relational database management system 1297RDF Resource Description Framework 1298RDM relational data model 1299RDMA remote direct memory access 1300RDP remote desktop protocol 1301RDRAM Rambus DRAM 1302RE regular expression 1303REPL read, evaluate, print, loop 1304REST representational state transfer 1305RF radio frequency 1306RFB remote frame buffer 1307RFI radio frequency interference 1308RFO request for ownership 1309RFU reserved for future use 1310RGB red green blue 1311RGBA red green blue alpha 1312RGMII reduced gigabit media independent interface 1313RH read hit 1314RHEL Red Hat Enterprise Linux 1315RHL Red Hat Linux 1316RIB routing information base 1317RIFF Resource Interchange File Format 1318RIP Raster Image Processor 1319RIP Routing Information Protocol 1320RIR regional Internet registry 1321RISC reduced instruction set {computer,computing} 1322RKM ROM Kernel Manual 1323RLE run length encoding 1324RLL run length limited 1325RLO right-to-left override 1326RM read miss 1327RMCP Remote Management Control Protocol 1328RMI remote method invocation 1329RMO Relaxed Memory Ordering 1330RMPM rapid memory power management 1331RMS root mean square 1332RMW read, modify, write 1333RNG random number generator 1334ROM read only memory 1335RPC remote procedure call 1336RPKI resource PKI 1337RPL requested privilege level 1338RPM revolutions per minute 1339RPN reverse Polish notation 1340RPVST Rapid Per-VLAN Spanning Tree 1341RR random replacement 1342RR round robin 1343RS relay station 1344RSA Rivest, Shamir, [and] Adleman 1345RSIP Realm Specific IP 1346RSN Robust Secure Network 1347RSS really simple syndication 1348RSS residual sum of squares 1349RSTP Rapid Spanning Tree Protocol 1350RT real time 1351RTC real time clock 1352RTC real time computing 1353RTF rich text format 1354RTL register transfer language 1355RTL resistor-transistor logic 1356RTL right to left 1357RTOS real time operating system 1358RTS request to send 1359RTT round trip time 1360RUP rational unified process 1361RW Rabin-Williams 1362RWM read-write memory 1363RX {receive,receiver} 1364S/PDIF Sony/Philips Digital Interface Format 1365SA security advisory 1366SA security association 1367SA source address 1368SA structured analysis 1369SAAS software as a service 1370SABRE Semi-automated business research environment 1371SACD super audio compact disc 1372SAD security association database 1373SAF-TE SCSI accessed fault-tolerant enclosure 1374SAGE Semi-automated ground environment 1375SAL {service,system} abstraction layer 1376SAM serial access memory 1377SAM sum addressed memory 1378SAML security assertion markup language 1379SAN storage area network 1380SAP service access point 1381SAPIC streamlined advanced programmable interrupt controller 1382SASD structured analysis, structured design 1383SASI Shugart Associates System Interface 1384SASL simple authentication [and] security layer 1385SATA serial advanced technology attachment 1386SAX simple API for XML 1387SB sound blaster 1388SBSA server base system architecture 1389SBU standard build unit 1390SC store conditional 1391SCA source code analyzer 1392SCADA supervisory control and data acquisition 1393SCC single chip cloud 1394SCC source code control 1395SCCP skinny call control protocol 1396SCCS Source Code Control System 1397SCI scalable coherent interface 1398SCI system control interrupt 1399SCM software configuration management 1400SCM source code management 1401SCM storage-class memory 1402SCO synchronous connection orientated 1403SCP secure copy 1404SCP system control processor 1405SCPI system control and power interface 1406SCSI Small Computer System Interface 1407SCTP Stream Control Transmission Protocol 1408SDDC software defined data center 1409SDEI software delegated exception interface 1410SDI symbol deinterleave 1411SDK software development kit 1412SDL Simple Declarative Language 1413SDL Simple Direct-media Layer 1414SDLC {software,system,systems} development life cycle 1415SDN software defined networking 1416SDP Session Description Protocol 1417SDR software defined radio 1418SDRAM synchronous dynamic random access memory 1419SDS software defined storage 1420SDT syntax-directed translation 1421SEA synchronous external abort 1422SEGV segmentation violation 1423SED self-encrypting drive 1424SED stream editor 1425SEMB serial ATA enclosure management bridge 1426SEO search engine optimization 1427SES SCSI enclosure services 1428SFC sequential function chart 1429SFI simple firmware interface 1430SFI software fault isolation 1431SFTP SSH File Transfer Protocol 1432SFTP Serial File Transfer Protocol 1433SFTP Simple File Transfer Protocol 1434SGI Silicon Graphics, Inc 1435SGI software generated interrupt 1436SGMII serial gigabit media independent interface 1437SGPIO serial general purpose input/output 1438SGRAM synchronous graphics random access memory 1439SHA secure hash algorithm 1440SICP structure and interpretation of computer programs 1441SIDH supersingular isogeny Diffie-Hellman 1442SIEM security information and event management 1443SIF source input format 1444SIFS short inter-frame space 1445SIM subscriber identity module 1446SIMD single instruction, multiple data 1447SIMM single inline memory module 1448SIP Session Initiation Protocol 1449SIR signal-to-interference ratio 1450SIR slow infrared 1451SISD single instruction, single data 1452SLAAC stateless address auto-configuration 1453SLC single-level cell 1454SLDRAM synchronous-link dynamic random access memory 1455SLED single large expensive disk 1456SLI scalable link interface 1457SLI scan-line interleave 1458SLIC system license internal code 1459SLOC source lines of code 1460SLRU segmented LRU 1461SMA smart memory access 1462SMAF system management action field 1463SMAP Simple Mail Access Protocol 1464SMAP supervisor mode access prevention 1465SMART self-monitoring analysis and reporting technology 1466SMB Server Message Block 1467SMB system management bus 1468SMBIOS System Management BIOS 1469SMC system management controller 1470SMD storage module device 1471SMEP supervisor mode execution protection 1472SMF single mode fiber 1473SMI structure of management information 1474SMI system management interrupt 1475SMM system management mode 1476SMP serial management protocol 1477SMP symmetric multiprocessing 1478SMT simultaneous multithreading 1479SMTP Simple Mail Transfer Protocol 1480SMU system management unit 1481SNA systems network architecture 1482SNAP Sub-Network Access Protocol 1483SNIA Storage Networking Industry Association 1484SNMP Simple Network Management Protocol 1485SNR signal-to-noise ratio 1486SOA service oriented architecture 1487SOAP Simple Object Access Protocol 1488SOC system on chip 1489SOF start of frame 1490SOH start of header 1491SOHO small office/home office 1492SOL serial over LAN 1493SOM system on module 1494SP service pack 1495SP stack pointer 1496SPA storage pool allocator 1497SPAN switched port analyzer 1498SPARC scalable processor architecture 1499SPARQL SPARQL Protocol and RDF Query Language 1500SPD security policy database 1501SPD serial presence detect 1502SPDIF Sony/Philips digital interface format 1503SPI serial peripheral interface 1504SPI stateful packet inspection 1505SPL system interrupt priority level 1506SPL spinlock 1507SPMD single process, multiple data 1508SPR special purpose register 1509SPT sectors per track 1510SQA software quality assurance 1511SQCIF sub quarter common intermediate format 1512SQL Structured Query Language 1513SRAM static random access memory 1514SRC sample rate conversion 1515SRP SCSI RDMA protocol 1516SRR shaped round robin 1517SS self-snoop 1518SS stack segment 1519SSA static single assignment 1520SSAP source service access point 1521SSB single-sideband modulation 1522SSC spread spectrum clock 1523SSD solid state drive 1524SSE streaming SIMD extensions 1525SSFDC solid state floppy disc card 1526SSH secure shell 1527SSI server side includes 1528SSID service set identifier 1529SSL secure sockets layer 1530SSP stack smashing protection 1531STC software thermal control 1532STD state transition diagram 1533STM software transactional memory 1534STOMP Streaming Text Oriented Messaging Protocol 1535STP Spanning Tree Protocol 1536STP shielded twisted pair 1537STRG spanning tree root guard 1538SUN Stanford University Network 1539SUS Single Unix Specification 1540SUT system under test 1541SVC switched virtual circuit 1542SVG scalable vector graphics 1543SVGA Super Video Graphics Array 1544SVI {switch,switched} virtual interface 1545SVM secure virtual machine 1546SVM support vector machine 1547SVR System V Release 1548SVS Separate Virtual Space 1549SWF Shockwave Flash 1550SWIG simplified wrapper [and] interface generator 1551SYR symbol timing recovery 1552TA test assertion 1553TA transmitter address 1554TACACS terminal access controller access-control system 1555TAI international atomic time 1556TAO track at once 1557TAOCP The Art of Computer Programming 1558TAP Test Anything Protocol 1559TAS test and set 1560TB terabyte 1561TBNF transitional backus-naur form 1562TCB trace capture buffer 1563TCB trusted computing base 1564TCC thermal control circuit 1565TCL tool command language 1566TCP Transmission Control Protocol 1567TCQ tagged command queueing 1568TDC time [to] digital converter 1569TDD test-driven development 1570TDD time division duplex 1571TDM time division multiplexing 1572TDMA time division multiple access 1573TDOA time difference of arrival 1574TDP thermal design {point,power} 1575TDR time-domain reflectometry 1576TECO Text Editor and Corrector 1577TFT thin film transistor 1578TFTP Trivial File Transfer Protocol 1579TIAS try it and see 1580TIFF tagged image file format 1581TITS try it to see 1582TK temporal key 1583TKIP Temporal Key Integrity Protocol 1584TLA top level aggregator 1585TLB translation lookaside buffer 1586TLD top level domain 1587TLER time-limited error recovery 1588TLI transport layer interface 1589TLS thread local storage 1590TLS transport layer security 1591TM Turing machine 1592TM thermal monitor 1593TMG transmogrifier 1594TMDS transition minimized differential signaling 1595TMO timeout 1596TOD time of day 1597TOS terms of service 1598TOS trusted operating system 1599TOS type of service 1600TP transaction processing 1601TPI tracks per inch 1602TPM transactions per minute 1603TPM trusted platform module 1604TPR task priority register 1605TPS transactions per second 1606TPS transmission parameters signaling 1607TR task register 1608TR token ring 1609TRL timing recovery loop 1610TRNG true random number generator 1611TS terminal services 1612TS time series 1613TS time stamp 1614TS transport stream 1615TSAN Thread Sanitizer 1616TSC time stamp counter 1617TSD time stamp disable 1618TSDB time series database 1619TSL test, set, lock 1620TSO time sharing option 1621TSO Total Store Ordering 1622TSP Time-Stamp Protocol 1623TSP Tunnel Setup Protocol 1624TSP time synchronization protocol 1625TSP traveling salesman problem 1626TSS task state segment 1627TTL time to live 1628TTL transistor-transistor logic 1629TTM translation table maps 1630TTY teletype 1631TUI {terminal,text-based,textual} user interface 1632TX {transmit out,transmitter} 1633TXG transaction group 1634TZ time zone 1635UAC user {access,account} control 1636UAF use-after-free 1637UART universal asynchronous receiver/transmitter 1638UAT user acceptance testing 1639UB undefined behavior 1640UBSAN Undefined Behavior Sanitizer 1641UC uncacheable 1642UCS uniform-cost search 1643UCS unified computing system 1644UCS universal coded character set 1645UDI uniform driver interface 1646UDMA ultra DMA 1647UDO ultra density optical 1648UDP User Datagram Protocol 1649UEFI unified extensible firmware interface 1650UFS Unix File System 1651UGA universal graphics adapter 1652UI unit interval 1653UI user interface 1654UICC universal integrated circuit card 1655UID unique identifier 1656UID user identifier 1657UL upload 1658UMA uniform memory access 1659UMA upper memory area 1660UMB upper memory block 1661UML unified modeling language 1662UMPC ultra-mobile PC 1663UPNP universal plug and play 1664UPS uninterruptible power supply 1665URI uniform resource identifier 1666URL uniform resource locator 1667URN uniform resource name 1668USART universal synchronous/asynchronous receiver/transmitter 1669USB universal serial bus 1670USWC uncacheable speculative write combining 1671UT unit test 1672UTC coordinated universal time 1673UTF unicode transformation formats 1674UTP unshielded twisted pair 1675UTS UNIX time-sharing 1676UUCP Unix-to-Unix Copy Protocol 1677UUID universally unique identifier 1678UUOC useless use of cat 1679UUT unit under test 1680UX user experience 1681VA vertical alignment 1682VA virtual address 1683VA volt-ampere 1684VAX virtual address extension 1685VB Visual Basic 1686VCA variable-gain amplifier 1687VCC common collector voltage 1688VCCP virtual chassis control protocol 1689VCF voltage-controlled filter 1690VCM virtual channel memory 1691VCO voltage-controlled oscillator 1692VCP virtual chassis port 1693VCS version control system 1694VDPAU Video Decode and Presentation API for Unix 1695VES virtual execution system 1696VESA Video Electronics Standards Association 1697VFO variable-frequency oscillator 1698VFS virtual file system 1699VG volume group 1700VGA Video Graphics Array 1701VHDCI very high density cable interconnect 1702VID {VLAN,voltage level} identifier 1703VIM Vi IMproved 1704VIPT virtually indexed, physically tagged 1705VIVT virtually indexed, virtually tagged 1706VLAN virtual local area network 1707VLD variable-length decoding 1708VLIW very long instruction word 1709VLSI very large scale integration 1710VLSM variable length subnet mask 1711VM virtual {machine,memory} 1712VME virtual mode extension 1713VMX vector multimedia extensions 1714VMX virtual machine extensions 1715VNC virtual network computing 1716VOD video on demand 1717VPD vital product data 1718VPN virtual private network 1719VPWS virtual private wire service 1720VR virtual reality 1721VRAM video random access memory 1722VRF virtual routing and forwarding 1723VRM voltage regulator module 1724VROC Virtual RAID On CPU 1725VRRP Virtual Router Redundancy Protocol 1726VSTP VLAN Spanning Tree Protocol 1727VTP VLAN Trunking Protocol 1728VXFS Veritas file sytem 1729VXVM Veritas volume manager 1730W watt 1731W3C World Wide Web Consortium 1732WAFL write anywhere file layout 1733WAMP Web Application Messaging Protocol 1734WAN wide area network 1735WAP Wireless Application Protocol 1736WAP wireless access point 1737WDM Windows Driver Model 1738WDDM Windows Display Driver Model 1739WDT watchdog timer 1740WEP Wired Equivalent Privacy 1741WFI wait for interrupt 1742WFQ weighted fair queuing 1743WH write hit 1744WHEA Windows hardware error architecture 1745WIFI wireless fidelity 1746WLAN wireless local area network 1747WM write miss 1748WMI Windows Management Instrumentation 1749WOL Wake-on-LAN 1750WOM Wake-on-Modem 1751WOR Wake-on-Ring 1752WORM write once read many 1753WP WordPerfect 1754WP word processor 1755WP write protect 1756WPA Wi-Fi Protected Access 1757WPA2 Wi-Fi Protected Access II 1758WPAD web proxy auto-discovery protocol 1759WPS Wi-Fi Protected Setup 1760WRAM window random access memory 1761WS web services 1762WTC write through caching 1763WTD weighted tail drop 1764WWAN wireless wide area network 1765WWW world wide web 1766WYSIAYG what you see is all you get 1767WYSIWYG what you see is what you get 1768XBAR crossbar 1769XDMCP X Display Manager control protocol 1770XER XML encoding rules 1771XGA Extended Graphics Array 1772XHR XMLHttpRequest 1773XIP execute in place 1774XML Extensible Markup Language 1775XNA XNA's not acronymed 1776XNS Xerox network systems 1777XOR exclusive or 1778XP extreme programming 1779XSI X/Open System Interface 1780XSL extensible stylesheet language 1781XSLT extensible stylesheet language transformations 1782XSS cross site scripting 1783XT extended technology 1784XTACACS extended terminal access controller access-control system 1785XTI X/Open transport interface 1786XUL XML user interface language 1787YACC yet another compiler compiler 1788YAML YAML ain't markup language 1789YANG yet another next generation 1790YAWPFAPR you are welcome; please file a problem report 1791YP Yellow Pages 1792YTD year to date 1793ZAP ZFS attribute processor 1794ZBR zone bit recording 1795ZFOD zero-filled on demand 1796ZFS zettabyte file system 1797ZIF zero insertion force 1798ZIFS zero insertion force socket 1799ZIL ZFS intent log 1800ZMA zone multicast address 1801ZOI zero one infinity 1802ZOI zone of influence 1803ZPL ZFS Posix layer 1804ZVOL ZFS Volume 1805