acronyms.comp revision 1.294
1$NetBSD: acronyms.comp,v 1.294 2019/10/20 21:53:42 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 open source definition 1100OSF open software foundation 1101OSI Open Source Initiative 1102OSI open systems interconnection 1103OSPF open shortest path first 1104OSPM OS power management 1105OSS open sound system 1106OSS open source software 1107OSVW operating system visible workarounds 1108OTP one time password 1109OTP open telecom platform 1110OU organizational unit 1111OUI organizationally unique identifier 1112OWL Web Ontology Language 1113P2P PCI to PCI 1114P2P peer to peer 1115PA phase accumulator 1116PA physical address 1117PAAS platform as a service 1118PAC phase-amplitude converter 1119PAE physical address extension 1120PAGP port aggregation protocol 1121PAL phase alternating line 1122PAL programmable array logic 1123PAM pluggable authentication modules 1124PAM pulse amplitude modulation 1125PAP password authentication protocol 1126PAT page attribute table 1127PAT port address translation 1128PATA parallel ATA 1129PAX portable archive exchange 1130PBE pending break encoding 1131PBE programming by example 1132PC personal computer 1133PC program counter 1134PCB printed circuit board 1135PCB process control block 1136PCB Protocol Control Block 1137PCC Portable C Compiler 1138PCD page-level cache disable 1139PCE path computation element 1140PCE performance-monitor counter enable 1141PCEP Path Computation Element Protocol 1142PCH platform controller hub 1143PCI peripheral component interconnect 1144PCM phase change memory 1145PCM pulse code modulation 1146PCMCIA Personal Computer Memory Card International Association 1147PCP Port Control Protocol 1148PD public domain 1149PDA personal digital assistant 1150PDA pushdown automaton 1151PDAG propositional directed acyclic graph 1152PDB power distribution board 1153PDF portable document format 1154PDM pulse-duration modulation 1155PDN pull-down network 1156PDP page {descriptor,directory} page 1157PDS product data sheet 1158PDU protocol data unit 1159PE protection enable 1160PE provider edge 1161PEAP Protected EAP 1162PECI platform environment control interface 1163PEP protocol extension protocol 1164PER packed encoding rules 1165PFS perfect forward secrecy 1166PGAS partitioned global address space 1167PGE page global enable 1168PGP Pretty Good Privacy 1169PHB PCI host bridge 1170PHP PHP: Hypertext Preprocessor 1171PIC performance instrumentation counters 1172PIC position independent code 1173PIC programmable interrupt controller 1174PICNIC problem in chair, not in computer 1175PID process id 1176PIE position independent executable 1177PIL Priority Interrupt Level 1178PIM personal information manager 1179PIM platform-independent model 1180PIO programmed input/output 1181PIPT physically indexed, physically tagged 1182PIQ prefetch input queue 1183PIT programmable interrupt timer 1184PIV personal identity verification 1185PIX Private Internet eXchange 1186PKCS public-key cryptography standards 1187PKI public key infrastructure 1188PLC programmable logic controller 1189PLD programmable logic device 1190PLL phase locked loop 1191PLRU pseudo LRU 1192PLTM package level thermal management 1193PM power management 1194PM {phase,pulse} modulation 1195PMC performance monitoring counters 1196PME power management event 1197PMEG page map entry group 1198PMI performance monitoring infrastructure 1199PMI platform management interrupt 1200PMIC power management integrated circut 1201PMIO port-mapped input/output 1202PMT photo-multiplier tube 1203PMU performance monitoring units 1204PMU power management unit 1205PNG portable network graphics 1206PNP plug and play 1207POE power over ethernet 1208POF probability of failure 1209POP Post Office Protocol 1210POP power on password 1211POR plan of record 1212POSIX Portable Operating System Interface [for Unix] 1213POST power on self test 1214POTS plain old telephone system 1215POWER Performance Optimization With Enhanced RISC 1216POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1217PP pair programming 1218PPB PCI [to] PCI bridge 1219PPC PowerPC 1220PPC Power Performance Computing 1221PPI pixels per inch 1222PPM pages per minute 1223PPP Point-to-Point Protocol 1224PPPOA Point-to-Point Protocol over ATM 1225PPPOE Point-to-Point Protocol over Ethernet 1226PPR processor programming reference 1227PPT powerpoint 1228PPT punched paper tape 1229PPU physics processing unit 1230PRAM Parameter RAM 1231PRBS pseudorandom bit sequence 1232PRG pseudorandom generator 1233PRF pseudorandom function [family] 1234PRML partial response, maximum likelihood 1235PRN pseudorandom {noise,number} 1236PRNG pseudorandom number generator 1237PROM programmable read only memory 1238PRP pseudorandom permutation 1239PRU Programmable Realtime Unit 1240PS PostScript 1241PSD power spectral density 1242PSE page size extensions 1243PSK phase shift keying 1244PSK pre-shared key 1245PSTN public switched telephone network 1246PSW program status word 1247PTE page table entry 1248PTLA pseudo top level aggregator 1249PTP page table page 1250PTV perceived target value 1251PU processing unit 1252PUC personal unblocking code 1253PUN physical unit number 1254PV physical volume 1255PVC permanent virtual circuit 1256PVG physical volume group 1257PVI protected-mode virtual interrupt 1258PVRST Per-VLAN rapid spanning tree 1259PVST Per-VLAN Spanning Tree 1260PWM pulse width modulation 1261PXE preboot execution environment 1262QA quality assurance 1263QAM quadrature amplitude modulation 1264QAM quality assurance management 1265QBE query by example 1266QC quality control 1267QDI quasi delay insensitive 1268QCIF quarter common intermediate format 1269QOS quality of service 1270QVL qualified vendor list 1271R/O read only 1272R/W read/write 1273RA receiver address 1274RA remote assistance 1275RA resource affinity 1276RA router advertisement 1277RAD rapid application development 1278RADIUS remote authentication dial-in user service 1279RAID redundant array of {independent,inexpensive} disks 1280RAM random access memory 1281RAS reliability, availability and serviceability 1282RAS remote access service 1283RAS restartable atomic sequence 1284RAS row address strobe 1285RBF radial basis function 1286RBNF routing backus-naur form 1287RBT red-black tree 1288RC release candidate 1289RC remote control 1290RC run commands 1291RCS Revision Control System 1292RCS revision control system 1293RCU read, copy, update 1294RDB Rigid Disk Block 1295RDBMS relational database management system 1296RDF Resource Description Framework 1297RDM relational data model 1298RDMA remote direct memory access 1299RDP remote desktop protocol 1300RDRAM Rambus DRAM 1301RE regular expression 1302REPL read, evaluate, print, loop 1303REST representational state transfer 1304RF radio frequency 1305RFB remote frame buffer 1306RFI radio frequency interference 1307RFO request for ownership 1308RFU reserved for future use 1309RGB red green blue 1310RGBA red green blue alpha 1311RGMII reduced gigabit media independent interface 1312RH read hit 1313RHEL Red Hat Enterprise Linux 1314RHL Red Hat Linux 1315RIB routing information base 1316RIFF Resource Interchange File Format 1317RIP Raster Image Processor 1318RIP Routing Information Protocol 1319RIR regional Internet registry 1320RISC reduced instruction set {computer,computing} 1321RKM ROM Kernel Manual 1322RLE run length encoding 1323RLL run length limited 1324RLO right-to-left override 1325RM read miss 1326RMCP Remote Management Control Protocol 1327RMI remote method invocation 1328RMO Relaxed Memory Ordering 1329RMPM rapid memory power management 1330RMS root mean square 1331RMW read, modify, write 1332RNG random number generator 1333ROM read only memory 1334RPC remote procedure call 1335RPKI resource PKI 1336RPL requested privilege level 1337RPM revolutions per minute 1338RPN reverse Polish notation 1339RPVST Rapid Per-VLAN Spanning Tree 1340RR random replacement 1341RR round robin 1342RS relay station 1343RSA Rivest, Shamir, [and] Adleman 1344RSIP Realm Specific IP 1345RSN Robust Secure Network 1346RSS really simple syndication 1347RSS residual sum of squares 1348RSTP Rapid Spanning Tree Protocol 1349RT real time 1350RTC real time clock 1351RTC real time computing 1352RTF rich text format 1353RTL register transfer language 1354RTL resistor-transistor logic 1355RTL right to left 1356RTOS real time operating system 1357RTS request to send 1358RTT round trip time 1359RUP rational unified process 1360RW Rabin-Williams 1361RWM read-write memory 1362RX {receive,receiver} 1363S/PDIF Sony/Philips Digital Interface Format 1364SA security advisory 1365SA security association 1366SA source address 1367SA structured analysis 1368SAAS software as a service 1369SABRE Semi-automated business research environment 1370SACD super audio compact disc 1371SAD security association database 1372SAF-TE SCSI accessed fault-tolerant enclosure 1373SAGE Semi-automated ground environment 1374SAL {service,system} abstraction layer 1375SAM serial access memory 1376SAM sum addressed memory 1377SAML security assertion markup language 1378SAN storage area network 1379SAP service access point 1380SAPIC streamlined advanced programmable interrupt controller 1381SASD structured analysis, structured design 1382SASI Shugart Associates System Interface 1383SASL simple authentication [and] security layer 1384SATA serial advanced technology attachment 1385SAX simple API for XML 1386SB sound blaster 1387SBSA server base system architecture 1388SBU standard build unit 1389SC store conditional 1390SCA source code analyzer 1391SCADA supervisory control and data acquisition 1392SCC single chip cloud 1393SCC source code control 1394SCCP skinny call control protocol 1395SCCS Source Code Control System 1396SCI scalable coherent interface 1397SCI system control interrupt 1398SCM software configuration management 1399SCM source code management 1400SCM storage-class memory 1401SCO synchronous connection orientated 1402SCP secure copy 1403SCP system control processor 1404SCPI system control and power interface 1405SCSI Small Computer System Interface 1406SCTP Stream Control Transmission Protocol 1407SDDC software defined data center 1408SDEI software delegated exception interface 1409SDI symbol deinterleave 1410SDK software development kit 1411SDL Simple Declarative Language 1412SDL Simple Direct-media Layer 1413SDLC {software,system,systems} development life cycle 1414SDN software defined networking 1415SDP Session Description Protocol 1416SDR software defined radio 1417SDRAM synchronous dynamic random access memory 1418SDS software defined storage 1419SDT syntax-directed translation 1420SEA synchronous external abort 1421SEGV segmentation violation 1422SED self-encrypting drive 1423SED stream editor 1424SEMB serial ATA enclosure management bridge 1425SEO search engine optimization 1426SES SCSI enclosure services 1427SFC sequential function chart 1428SFI simple firmware interface 1429SFI software fault isolation 1430SFTP SSH File Transfer Protocol 1431SFTP Serial File Transfer Protocol 1432SFTP Simple File Transfer Protocol 1433SGI Silicon Graphics, Inc 1434SGI software generated interrupt 1435SGMII serial gigabit media independent interface 1436SGPIO serial general purpose input/output 1437SGRAM synchronous graphics random access memory 1438SHA secure hash algorithm 1439SICP structure and interpretation of computer programs 1440SIDH supersingular isogeny Diffie-Hellman 1441SIEM security information and event management 1442SIF source input format 1443SIFS short inter-frame space 1444SIM subscriber identity module 1445SIMD single instruction, multiple data 1446SIMM single inline memory module 1447SIP Session Initiation Protocol 1448SIR signal-to-interference ratio 1449SIR slow infrared 1450SISD single instruction, single data 1451SLAAC stateless address auto-configuration 1452SLC single-level cell 1453SLDRAM synchronous-link dynamic random access memory 1454SLED single large expensive disk 1455SLI scalable link interface 1456SLI scan-line interleave 1457SLIC system license internal code 1458SLOC source lines of code 1459SLRU segmented LRU 1460SMA smart memory access 1461SMAF system management action field 1462SMAP Simple Mail Access Protocol 1463SMAP supervisor mode access prevention 1464SMART self-monitoring analysis and reporting technology 1465SMB Server Message Block 1466SMB system management bus 1467SMBIOS System Management BIOS 1468SMC system management controller 1469SMD storage module device 1470SMEP supervisor mode execution protection 1471SMF single mode fiber 1472SMI structure of management information 1473SMI system management interrupt 1474SMM system management mode 1475SMP serial management protocol 1476SMP symmetric multiprocessing 1477SMT simultaneous multithreading 1478SMTP Simple Mail Transfer Protocol 1479SMU system management unit 1480SNA systems network architecture 1481SNAP Sub-Network Access Protocol 1482SNIA Storage Networking Industry Association 1483SNMP Simple Network Management Protocol 1484SNR signal-to-noise ratio 1485SOA service oriented architecture 1486SOAP Simple Object Access Protocol 1487SOC system on chip 1488SOF start of frame 1489SOH start of header 1490SOHO small office/home office 1491SOL serial over LAN 1492SOM system on module 1493SP service pack 1494SP stack pointer 1495SPA storage pool allocator 1496SPAN switched port analyzer 1497SPARC scalable processor architecture 1498SPARQL SPARQL Protocol and RDF Query Language 1499SPD security policy database 1500SPD serial presence detect 1501SPDIF Sony/Philips digital interface format 1502SPI serial peripheral interface 1503SPI stateful packet inspection 1504SPL system interrupt priority level 1505SPL spinlock 1506SPMD single process, multiple data 1507SPR special purpose register 1508SPT sectors per track 1509SQA software quality assurance 1510SQCIF sub quarter common intermediate format 1511SQL Structured Query Language 1512SRAM static random access memory 1513SRC sample rate conversion 1514SRP SCSI RDMA protocol 1515SRR shaped round robin 1516SS self-snoop 1517SS stack segment 1518SSA static single assignment 1519SSAP source service access point 1520SSB single-sideband modulation 1521SSC spread spectrum clock 1522SSD solid state drive 1523SSE streaming SIMD extensions 1524SSFDC solid state floppy disc card 1525SSH secure shell 1526SSI server side includes 1527SSID service set identifier 1528SSL secure sockets layer 1529SSP stack smashing protection 1530STC software thermal control 1531STD state transition diagram 1532STM software transactional memory 1533STOMP Streaming Text Oriented Messaging Protocol 1534STP Spanning Tree Protocol 1535STP shielded twisted pair 1536STRG spanning tree root guard 1537SUN Stanford University Network 1538SUS Single Unix Specification 1539SUT system under test 1540SVC switched virtual circuit 1541SVG scalable vector graphics 1542SVGA Super Video Graphics Array 1543SVI {switch,switched} virtual interface 1544SVM secure virtual machine 1545SVM support vector machine 1546SVR System V Release 1547SVS Separate Virtual Space 1548SWF Shockwave Flash 1549SWIG simplified wrapper [and] interface generator 1550SYR symbol timing recovery 1551TA test assertion 1552TA transmitter address 1553TACACS terminal access controller access-control system 1554TAI international atomic time 1555TAO track at once 1556TAOCP The Art of Computer Programming 1557TAP Test Anything Protocol 1558TAS test and set 1559TB terabyte 1560TBNF transitional backus-naur form 1561TCB trace capture buffer 1562TCB trusted computing base 1563TCC thermal control circuit 1564TCL tool command language 1565TCP Transmission Control Protocol 1566TCQ tagged command queueing 1567TDC time [to] digital converter 1568TDD test-driven development 1569TDD time division duplex 1570TDM time division multiplexing 1571TDMA time division multiple access 1572TDOA time difference of arrival 1573TDP thermal design {point,power} 1574TDR time-domain reflectometry 1575TECO Text Editor and Corrector 1576TFT thin film transistor 1577TFTP Trivial File Transfer Protocol 1578TIAS try it and see 1579TIFF tagged image file format 1580TITS try it to see 1581TK temporal key 1582TKIP Temporal Key Integrity Protocol 1583TLA top level aggregator 1584TLB translation lookaside buffer 1585TLD top level domain 1586TLER time-limited error recovery 1587TLI transport layer interface 1588TLS thread local storage 1589TLS transport layer security 1590TM Turing machine 1591TM thermal monitor 1592TMG transmogrifier 1593TMDS transition minimized differential signaling 1594TMO timeout 1595TOD time of day 1596TOS terms of service 1597TOS trusted operating system 1598TOS type of service 1599TP transaction processing 1600TPI tracks per inch 1601TPM transactions per minute 1602TPM trusted platform module 1603TPR task priority register 1604TPS transactions per second 1605TPS transmission parameters signaling 1606TR task register 1607TR token ring 1608TRL timing recovery loop 1609TRNG true random number generator 1610TS terminal services 1611TS time series 1612TS time stamp 1613TS transport stream 1614TSAN Thread Sanitizer 1615TSC time stamp counter 1616TSD time stamp disable 1617TSDB time series database 1618TSL test, set, lock 1619TSO time sharing option 1620TSO Total Store Ordering 1621TSP Time-Stamp Protocol 1622TSP Tunnel Setup Protocol 1623TSP time synchronization protocol 1624TSP traveling salesman problem 1625TSS task state segment 1626TTL time to live 1627TTL transistor-transistor logic 1628TTM translation table maps 1629TTY teletype 1630TUI {terminal,text-based,textual} user interface 1631TX {transmit out,transmitter} 1632TXG transaction group 1633TZ time zone 1634UAC user {access,account} control 1635UAF use-after-free 1636UART universal asynchronous receiver/transmitter 1637UAT user acceptance testing 1638UB undefined behavior 1639UBSAN Undefined Behavior Sanitizer 1640UC uncacheable 1641UCS uniform-cost search 1642UCS unified computing system 1643UCS universal coded character set 1644UDI uniform driver interface 1645UDMA ultra DMA 1646UDO ultra density optical 1647UDP User Datagram Protocol 1648UEFI unified extensible firmware interface 1649UFS Unix File System 1650UGA universal graphics adapter 1651UI unit interval 1652UI user interface 1653UICC universal integrated circuit card 1654UID unique identifier 1655UID user identifier 1656UL upload 1657UMA uniform memory access 1658UMA upper memory area 1659UMB upper memory block 1660UML unified modeling language 1661UMPC ultra-mobile PC 1662UPNP universal plug and play 1663UPS uninterruptible power supply 1664URI uniform resource identifier 1665URL uniform resource locator 1666URN uniform resource name 1667USART universal synchronous/asynchronous receiver/transmitter 1668USB universal serial bus 1669USWC uncacheable speculative write combining 1670UT unit test 1671UTC coordinated universal time 1672UTF unicode transformation formats 1673UTP unshielded twisted pair 1674UTS UNIX time-sharing 1675UUCP Unix-to-Unix Copy Protocol 1676UUID universally unique identifier 1677UUOC useless use of cat 1678UUT unit under test 1679UX user experience 1680VA vertical alignment 1681VA virtual address 1682VA volt-ampere 1683VAX virtual address extension 1684VB Visual Basic 1685VCA variable-gain amplifier 1686VCC common collector voltage 1687VCCP virtual chassis control protocol 1688VCF voltage-controlled filter 1689VCM virtual channel memory 1690VCO voltage-controlled oscillator 1691VCP virtual chassis port 1692VCS version control system 1693VDPAU Video Decode and Presentation API for Unix 1694VES virtual execution system 1695VESA Video Electronics Standards Association 1696VFO variable-frequency oscillator 1697VFS virtual file system 1698VG volume group 1699VGA Video Graphics Array 1700VHDCI very high density cable interconnect 1701VID {VLAN,voltage level} identifier 1702VIM Vi IMproved 1703VIPT virtually indexed, physically tagged 1704VIVT virtually indexed, virtually tagged 1705VLAN virtual local area network 1706VLD variable-length decoding 1707VLIW very long instruction word 1708VLSI very large scale integration 1709VLSM variable length subnet mask 1710VM virtual {machine,memory} 1711VME virtual mode extension 1712VMX vector multimedia extensions 1713VMX virtual machine extensions 1714VNC virtual network computing 1715VOD video on demand 1716VPD vital product data 1717VPN virtual private network 1718VPWS virtual private wire service 1719VR virtual reality 1720VRAM video random access memory 1721VRF virtual routing and forwarding 1722VRM voltage regulator module 1723VROC Virtual RAID On CPU 1724VRRP Virtual Router Redundancy Protocol 1725VSTP VLAN Spanning Tree Protocol 1726VTP VLAN Trunking Protocol 1727VXFS Veritas file sytem 1728VXVM Veritas volume manager 1729W watt 1730W3C World Wide Web Consortium 1731WAFL write anywhere file layout 1732WAMP Web Application Messaging Protocol 1733WAN wide area network 1734WAP Wireless Application Protocol 1735WAP wireless access point 1736WDM Windows Driver Model 1737WDDM Windows Display Driver Model 1738WDT watchdog timer 1739WEP Wired Equivalent Privacy 1740WFI wait for interrupt 1741WFQ weighted fair queuing 1742WH write hit 1743WHEA Windows hardware error architecture 1744WIFI wireless fidelity 1745WLAN wireless local area network 1746WM write miss 1747WMI Windows Management Instrumentation 1748WOL Wake-on-LAN 1749WOM Wake-on-Modem 1750WOR Wake-on-Ring 1751WORM write once read many 1752WP WordPerfect 1753WP word processor 1754WP write protect 1755WPA Wi-Fi Protected Access 1756WPA2 Wi-Fi Protected Access II 1757WPAD web proxy auto-discovery protocol 1758WPS Wi-Fi Protected Setup 1759WRAM window random access memory 1760WS web services 1761WTC write through caching 1762WTD weighted tail drop 1763WWAN wireless wide area network 1764WWW world wide web 1765WYSIAYG what you see is all you get 1766WYSIWYG what you see is what you get 1767XBAR crossbar 1768XDMCP X Display Manager control protocol 1769XER XML encoding rules 1770XGA Extended Graphics Array 1771XHR XMLHttpRequest 1772XIP execute in place 1773XML Extensible Markup Language 1774XNA XNA's not acronymed 1775XNS Xerox network systems 1776XOR exclusive or 1777XP extreme programming 1778XSI X/Open System Interface 1779XSL extensible stylesheet language 1780XSLT extensible stylesheet language transformations 1781XSS cross site scripting 1782XT extended technology 1783XTACACS extended terminal access controller access-control system 1784XTI X/Open transport interface 1785XUL XML user interface language 1786YACC yet another compiler compiler 1787YAML YAML ain't markup language 1788YANG yet another next generation 1789YAWPFAPR you are welcome; please file a problem report 1790YP Yellow Pages 1791YTD year to date 1792ZAP ZFS attribute processor 1793ZBR zone bit recording 1794ZFOD zero-filled on demand 1795ZFS zettabyte file system 1796ZIF zero insertion force 1797ZIFS zero insertion force socket 1798ZIL ZFS intent log 1799ZMA zone multicast address 1800ZOI zero one infinity 1801ZOI zone of influence 1802ZPL ZFS Posix layer 1803ZVOL ZFS Volume 1804