acronyms.comp revision 1.285
1$NetBSD: acronyms.comp,v 1.285 2019/08/22 21:30:47 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 120BA byte align 121BAL basic assembly language 122BAR base address register 123BBS bulletin board system 124BCC blind carbon copy 125BCD binary coded decimal 126BCH boot console handler 127BCR byte count register 128BCS base configuration space 129BD baud 130BDD binary decision diagram 131BDI bit deinterleave 132BDUF big design up front 133BEDO burst extended data output 134BER basic encoding rules 135BER bit error {rate,ratio} 136BERT boot error record table 137BFD bidirectional forwarding detection 138BFD binary {file,format} descriptor 139BFKL big fscking kernel lock 140BFS breadth-first search 141BFT binary file transfer 142BGA ball grid array 143BGP Border Gateway Protocol 144BGPSEC BGP Security 145BIND Berkeley Internet Name Daemon 146BIOS Basic Input/Output System 147BIOS built-in operating system 148BIST built-in self-test 149BIU bus interface unit 150BKDG BIOS and kernel developer's guide 151BLAS basic linear algebra subprograms 152BLC back light control 153BLOB binary large object 154BM bus master 155BMC baseboard management controller 156BMIC bus master interface controller 157BN boundary neutral 158BNF Backus-Naur form 159BO binary output 160BOF beginning of file 161BOM beginning of message 162BOM byte order mark 163BP base pointer 164BP boot processor 165BPB BIOS parameter block 166BPDU bridge protocol data unit 167BPF Berkeley Packet Filter 168BPI bits per inch 169BPM business process modelling 170BPS bits per second 171BPSK binary phase shift keying 172BQS Berkeley quality software 173BRE basic regular expression 174BS backspace 175BS binary sequence 176BSA basic service area 177BSD Berkeley Software Distribution 178BSDP Boot Service Discovery Protocol 179BSF bit scan forward 180BSOD blue screen of death 181BSP binary space partition 182BSP board support package 183BSP bootstrap processor 184BSR bit scan reverse 185BSS basic service set 186BSS block started by symbol 187BSSID basic service set identifier 188BT BitTorrent 189BT Bluetooth 190BT bit test 191BTC bit test [and] complement 192BTM bus transport mechanism 193BTR bit test [and] reset 194BTS bit test [and] set 195BTS bug tracking system 196BW bandwidth 197BWM block-write mode 198BUAG big ugly ASCII graphic 199CA certificate authority 200CACLS change access control lists 201CAD computer-aided design 202CAM computer assisted manufacturing 203CAM conditional access module 204CAM content addressable memory 205CARP Common Address Redundancy Protocol 206CAS column address strobe 207CAS compare and swap 208CAS computer algebra system 209CASE computer aided software engineering 210CAU control access unit 211CAV constant angular velocity 212CBC cipher block chaining 213CBR constant bit rate 214CC carbon copy 215CCD charge coupled device 216CCI co-channel interferer 217CCNUMA cache-coherent non-uniform memory access 218CCTL command completion time limit 219CD cache disable 220CD compact disc 221CDDA compact disc digital audio 222CDL compiler description language 223CDMA code division multiple access 224CDP Cisco Discovery Protocol 225CDRAM cache dynamic random access memory 226CER canonical encoding rules 227CE customer edge 228CF compact flash 229CFB cipher feedback 230CFG context-free grammar 231CFG control-flow graph 232CFI control-flow integrity sanitizer 233CG control gate 234CGA Color Graphics Adapter 235CGI common gateway interface 236CGN Carrier-Grade NAT 237CHAP Challenge-Handshake Authentication Protocol 238CHFS chip file system 239CHS cylinder/head/sector 240CI continuous integration 241CI {common,component} interface 242CIDR Classless Inter-Domain Routing 243CIF common intermediate format 244CIFS Common Internet File System 245CIL common intermediate language 246CIR carrier-to-interference ratio 247CIS contact image sensor 248CISC complex instruction set {computer,computing} 249CJK Chinese, Japanese, [and] Korean 250CLF common log format 251CLI command line interface 252CLI common language infrastructure 253CLR common language runtime 254CLS common language specification 255CLTT closed loop thermal throttling 256CLUT color look-up table 257CLV constant linear velocity 258CM configuration management 259CMA concert multithread architecture 260CMC chassis management controller 261CMC corrected machine check 262CMS {configuration,content,course} management system 263CMI control {management,method} interface 264CMOS complementary metal-oxide-semiconductor 265CMP chip multi-processing 266CMS content management system 267CMYK cyan magenta yellow black 268CN {common,canonical} name 269CNC computer numerical control 270CNR carrier-to-noise ratio 271COA change of authority 272COF current operating frequency 273COFDM coded orthogonal frequency division multiplexing 274COFF common object file format 275COM component object model 276COM computer on module 277COMA cache-only memory architecture 278CORBA common object request broker architecture 279COS class of service 280COW copy-on-write 281CP continuous pilot 282CPB core performance boost 283CPC central processor complex 284CPC cpu performance counters 285CPE common phase error 286CPE common platform enumeration 287CPER common platform error record 288CPG clock pulse generator 289CPI cycles per instruction 290CPL current privilege level 291CPLD complex programmable logic device 292CPP C preprocessor 293CPS characters per second 294CPS continuation-passing style 295CPT command pass through 296CPU central processing unit 297CR carriage return 298CRC cyclic redundancy check 299CRL carrier recovery loop 300CRLF carriage return line feed 301CRT cathode ray tube 302CRUD create, read, update, and delete 303CS cable select 304CS chip select 305CS code segment 306CS computer science 307CSDL {common,conceptual} schema definition language 308CSI channel state information 309CSI common system interface 310CSMA carrier sense multiple access 311CSMA/CA carrier sense multiple access with collision avoidance 312CSMA/CD carrier sense multiple access with collision detection 313CSP communicating sequential processes 314CSP content security policy 315CSP constrain satisfaction problems 316CSP cryptographic service provider 317CSR control [and] status registers 318CSRG Computer Systems Research Group 319CSS cascading style sheets 320CST common spanning tree 321CSV comma-separated values 322CTF compact c type format 323CTM close to metal 324CTR counter [mode] 325CTS clear to send 326CTS common type system 327CUA common user access 328CUT coordinated universal time 329CV control voltage 330CVE common vulnerabilities and exposures 331CVS Concurrent Versions System 332DA destination address 333DAA distributed application architecture 334DAB digital audio broadcasting 335DAC digital [to] analog converter 336DAC discretionary access control 337DAD duplicate address detection 338DANE DNS-based Authentication of Named Entities 339DAO disk at once 340DAP Directory Access Protocol 341DAT digital audio tape 342DAT dynamic acceleration technology 343DB database 344DBA database administrator 345DBA dynamic bandwidth allocation 346DBB data bus buffer 347DBC design by contract 348DBL dynamic buffer limiting 349DBMS database management system 350DBS database server 351DC direct current 352DCC Direct Client-to-Client 353DCC direct cable connect 354DCD data carrier detect 355DCE data control equipment 356DCE distributed computing environment 357DCIM data center infrastructure management 358DCIM digital camera images 359DCL Digital Command Language 360DCOM distributed component object model 361DCOP Desktop COmmunication Protocol 362DCS data collection systems 363DCT discrete cosine transform 364DCU data cache unit 365DDC display data channel 366DDE dynamic data exchange 367DDI device drivers interface 368DDK device driver kit 369DDL data description language 370DDR double data rate 371DDS direct digital sound 372DDWG Digital Display Working Group 373DE debugging extensions 374DE desktop environment 375DEA data encryption algorithm 376DEC Digital Equipment Corporation 377DEK data encryption key 378DEP data execution prevention 379DER distinguished encoding rules 380DES Data Encryption Standard 381DF don't fragment 382DFA deterministic finite automaton 383DFC data flow control 384DFS depth first search 385DFS distributed file system 386DFSAN Data Flow Sanitizer 387DFT diagnostic function test 388DFT discrete Fourier transform 389DGL data generation language 390DH Diffie-Hellman 391DHCP Dynamic Host Configuration Protocol 392DIA dedicated Internet access 393DIFS distributed inter-frame space 394DIMM dual inline memory module 395DIRT design in real time 396DKI driver/kernel interface 397DL diode logic 398DL discrete logarithm 399DL download 400DLCI data link connection identifier 401DLE data link escape 402DLL dynamic link library 403DLP discrete logarithm problem 404DMA direct memory access 405DMI desktop management interface 406DMS document management system 407DMT discrete multitone modulation 408DMU data management layer 409DNARD Digital network appliance reference design 410DND drag and drop 411DNLC directory name lookup cache 412DNS Domain Name System 413DNSSEC DNS Security Extensions 414DOE distributed object environment 415DOF data over fibre 416DOM document object model 417DOS denial of service 418DOS disk operating system 419DP DisplayPort 420DPC deferred procedure call 421DPCM differential pulse code modulation 422DPD dead peer detection 423DPI deep packet inspection 424DPI dots per inch 425DPL descriptor privilege level 426DPS Display PostScript 427DPST display power savings technology 428DRAAS disaster recovery as a service 429DRAM dynamic random access memory 430DRBG deterministic random bit generator 431DRI direct rendering infrastructure 432DRM digital rights management 433DRRS display refresh rate switching 434DS debug store 435DS differentiated services 436DSA digital signature algorithm 437DSAP destination service access point 438DSB double-sideband modulation 439DSCP differentiated services code point 440DSDT differentiated system descriptor table 441DSF device special file 442DSL dataset and snapshot layer 443DSL digital subscriber line 444DSL domain specific language 445DSLAM digital subscriber line access multiplexer 446DSN delivery status notification 447DSO dynamic shared object 448DSP digital signal processor 449DSSS direct sequence spread spectrum 450DTB device tree blob 451DTC device tree compiler 452DTD document type definition 453DTE data terminal equipment 454DTE dumb terminal emulator 455DTL diode-transistor logic 456DTLS datagram transport layer security 457DTS device tree source 458DTS digital thermal sensor 459DUT device under test 460DVB digital video broadcasting 461DVCS distributed version control system 462DVD digital versatile disc 463DVFS dynamic voltage and frequency scaling 464DVI device independent 465DVI Digital Visual Interface 466DVR digital video recorder 467E-XER extended XML encoding rules 468EABI embedded-application binary interface 469EAI Email Address Internationalization 470EAI Enterprise Application Integration 471EAP Extensible Authentication Protocol 472EAPOL EAP over Lan 473EAV entity-attribute-value model 474EAV ethernet audio/video bridging 475EBCDIC Extended Binary Coded Decimal Interchange Code 476EBDA Extended BIOS Data Area 477EBNF extended backus-naur form 478EBR extended boot record 479EC elliptic curve 480ECC elliptic curve cryptography 481ECC error correction code 482ECDH elliptic curve Diffie-Hellman 483ECDL elliptic curve discrete logarithm 484ECDLP elliptic curve discrete logarithm problem 485ECDSA elliptic curve digital signature algorithm 486ECL emitter-coupled logic 487ECN explicit congestion notification 488ECP enhanced capability port 489ECS enhanced chip set 490ECS extended configuration space 491EDAC error detection and correction 492EDAT enhanced dynamic acceleration technology 493EdDSA Edwards curve digital signature algorithm 494EDGE explicit data graph execution 495EDID extended display identification data 496EDO extended data out 497EDS electronical data sheet 498EDSAC electronic delay storage automatic calculator 499EDVAC electronic discrete variable automatic computer 500EEE energy efficient ethernet 501EEPROM electrically erasable programmable read only memory 502EFI extensible firmware interface 503EFL emitter follower logic 504EFM eight to fourteen modulation 505EFS extent file system 506EGA Enhanced Graphics Adapter 507EGP exterior gateway protocol 508EH extension header 509EIDE enhanced IDE 510EISA extended industry standard architecture 511EINJ error injection table 512ELF executable and linking format 513ELS entry level system 514EMI electro-magnetic interference 515EMP electro-magnetic pulse 516EMR electro-magnetic radiation 517EMACS Editor MACroS 518ENIAC electronic numerical integrator and computer 519EOF end of file 520EOI end of interrupt 521EOIS end of interactive support 522EOL end of life 523EOL end of line 524EOT end of transmission 525EPIC explicitly parallel instruction computing 526EPP enhanced parallel port 527EPRML extended partial response, maximum likelihood 528EPROM erasable programmable read only memory 529ERC error recovery control 530ERD emergency recovery disk 531ERD entity relationship diagram 532ERE extended regular expression 533ERST error record serialization table 534ESAN Efficiency Sanitizer 535ESB enterprise service bus 536ESDI enhanced small disk interface 537ESDRAM enhanced synchronous dynamic random access memory 538ESI enclosure services interface 539ESS electronic switching system 540ESS extended service set 541ESSID extended service set identifier 542EST enhanced speedstep 543ETL extract, transform, load 544EU execution unit 545EULA end user license agreement 546FAT file allocation table 547FBRAM frame buffer random access memory 548FCIF full common intermediate format 549FCL fiber channel loop 550FCS frame check sequence 551FDC floppy disk controller 552FDD floppy disk drive 553FDDI fiber distributed data interface 554FDE full disk encryption 555FDT flattened device tree 556FEA finite element analysis 557FEC forward error correction 558FET field-effect transistor 559FF finite field 560FF form feed 561FFDH finite-field Diffie-Hellman 562FFH functional fixed hardware 563FFI foreign function interface 564FFM focus follows mouse 565FFS Fast File System 566FFS find first set 567FFT fast Fourier transform 568FG floating gate 569FHSS frequency hop spread spectrum 570FID frequency identifier 571FIFO first in, first out 572FILO first in, last out 573FIPS Federal Information Processing Standards 574FIR fast infrared 575FLOPS floating [point] operations per second 576FLOSS free/libre/open source software 577FM frequency modulation 578FMR false match rate 579FOSS free/open source software 580FPGA field programmable gate array 581FPM fast page mode 582FPR floating point register 583FPU floating point unit 584FQDN fully qualified domain name 585FRR false rejection rate 586FRU field replaceable unit 587FS file system 588FSB front side bus 589FSCK file system check 590FSF Free Software Foundation 591FSK frequency shift keying 592FSM finite-state machine 593FTA fault tree analysis 594FTL flash translation layer 595FTP File Transfer Protocol 596FTPS File Transfer Protocol Secure 597FUS fast user switching 598FWH firmware hub 599FWS folding white space 600GAL generic array logic 601GARP generic attribute registration protocol 602GAS generic address structure 603GC garbage collector 604GCM Galois counter mode 605GCR group-coded recording 606GDI Graphics Device Interface 607GDT global descriptor table 608GEM graphics environment manager 609GEM graphics execution manager 610GENA general event notification architecture 611GHC Glasgow Haskell compiler 612GHES generic hardware error source 613GIC generic interrupt controller 614GID group identifier 615GIF graphics interchange format 616GMCH graphics and memory controller hub 617GNU GNU's Not Unix 618GOP graphics output protocol 619GOT global offset table 620GPE general purpose event 621GPF general protection fault 622GPG GNU Privacy Guard 623GPL [GNU] General Public License 624GPR general purpose register 625GPS generalized processor sharing 626GPT GUID partition table 627GPU graphics processing unit 628GR golden ratio 629GRE generic routing encapsulation 630GSI global system interrupt 631GUI graphical user interface 632GUID globally unique identifier 633GVFS git virtual file system 634HA high availability 635HAL hardware abstraction layer 636HAT hashed array tree 637HATEOAS hypermedia as the engine of application state 638HBA host bus adapter 639HCF halt and catch fire 640HCI host controller interface 641HCI human-computer interaction 642HCL hardware compatibility list 643HDCP High-bandwidth Digital Content Protection 644HDD hard disk drive 645HDL hardware description language 646HDMI High-Definition Multimedia Interface 647HDTV high-definition television 648HECI host embedded controller interface 649HEST hardware error source table 650HEVC high efficiency video coding 651HF high frequency 652HFM highest frequency mode 653HFS hierarchical file system 654HID human interface device 655HKP HTTP Keyserver Protocol 656HLL high-level language 657HMA high memory area 658HMI human-machine interface 659HOOD hierarchical object oriented design 660HP Hewlett-Packard 661HPC high performance computing 662HPET high precision event timer 663HSM hardware security module 664HSM hierarchical storage management 665HT hyper-threading 666HTC hardware thermal control 667HTCC high temperature co-fired ceramic 668HTML HyperText Markup Language 669HTT hyper-threading technology 670HTTP Hypertext Transfer Protocol 671HTTPS Hypertext Transfer Protocol Secure 672HVM hardware virtual machine 673HVDS High-Voltage Differential Signaling 674HWASAN Hardware-assisted Address Sanitizer 675HZ Hertz 676I2O intelligent input/output 677IA information assurance 678IAAS infrastructure as a service 679IANA Internet Assigned Numbers Authority 680IBC iterated block cipher 681IBM International Business Machines 682IBPI international blinking pattern interpretation 683IBS instruction based sampling 684IBSS independent basic service set 685IC integrated circuit 686ICA independent computer architecture 687ICACLS integrity control access control lists 688ICB Internet Citizen's Band 689ICE in-circuit emulator 690ICE internal compiler error 691ICH I/O controller hub 692ICMP Internet Control Message Protocol 693ICT information and communications technology 694ICW initialization command word 695IDA Intel dynamic acceleration 696IDCMP Intuition direct communication message port 697IDCT inverse discrete cosine transform 698IDE integrated development environment 699IDE integrated drive electronics 700IDPS intrusion detection [and] prevention system 701IDRP inter-domain routing protocol 702IDS intrusion detection system 703IDT interrupt descriptor table 704IE Internet Explorer 705IEC International Electrotechnical Commission 706IEEE Institute of Electrical and Electronics Engineers 707IESG Internet Engineering Steering Group 708IETF Internet Engineering Task Force 709IF intermediate frequency 710IFCM isochronous flow control mode 711IFF Interchange File Format 712IFS internal field separator 713IGD Internet gateway device 714IGMP Internet Group Management Protocol 715IGP interior gateway protocol 716IHV independent hardware vendor 717IKE Internet key exchange 718ILM internal loopback mode 719ILOM integrated lights-out management 720ILP instruction level parallelism 721IM instant messaging 722IMAP Internet Message Access Protocol 723IMC integrated memory controller 724IMCR interrupt mode configuration register 725IMR interrupt mask register 726IMS information management system 727IMSI international mobile subscriber identity 728INCITS InterNational Committee for Information Technology Standards 729IO input/output 730IOCTL input/output control 731IOM input/output managers 732IOMMU input/output memory management unit 733IOT Internet of Things 734IP Internet Protocol 735IP intellectual property 736IPC instructions per cycle 737IPC interprocess communication 738IPCF interprocess communication facility 739IPE integrated programming environment 740IPI intelligent peripheral interface 741IPI interprocessor interrupt 742IPL Initial Program Load 743IPL Interrupt Priority Level 744IPMB Intelligent Platform Management Bus 745IPMI Intelligent Platform Management Interface 746IPNG Internet Protocol, Next Generation 747IPS in-plane switching 748IPS intrusion prevention system 749IPSEC Internet Protocol Security 750IRC Internet Relay Chat 751IRDA infrared data association 752IRDP ICMP Router Discovery Protocol 753IRQ interrupt request 754IRQL interrupt request level 755IRR interrupt request register 756IRTF Internet Research Task Force 757IS information system 758ISA industry standard architecture 759ISA instruction set architecture 760ISE instant secure erase 761ISDN integrated services digital network 762ISI inter-symbol interference 763ISL initial system load 764ISM industrial, scientific, [and] medical 765ISN initial serial number 766ISO International Standards Organization 767ISOC Internet Society 768ISP Internet service provider 769ISR in-service register 770ISR interrupt service routine 771IST internal spanning tree 772IST interrupt stack table 773ISV independent software vendor 774IT information technology 775ITB Intel Turbo Boost 776ITIL information technology infrastructure library 777ITP in-target probe 778ITSM IT service management 779IV initialization vector 780IVT interrupt vector table 781JBOD just a bunch of disks 782JCL Job Control Language 783JFET junction [gate] field-effect transistor 784JIT just in time 785JPEG Joint Photographic Experts Group 786JRE Java Runtime Environment 787JSON JavaScript Object Notation 788JTAG joint test action group 789KASLR kernel address space layout randomization 790KB keyboard 791KB kilobyte 792KBD keyboard 793KBD kilobaud 794KCS keyboard controller style 795KLOC thousand lines of code 796KMS kernel-mode setting 797KPI kernel programming interface 798KVA kernel virtual address 799KVM kernel virtual machine 800KVM kernel virtual memory 801KVM keyboard, video, [and] mouse 802L2CAP link layer control and adaptation protocol 803LAMP Linux Apache MySQL {Perl,PHP,Python} 804LAN local area network 805LAPIC local advanced programmable interrupt controller 806LAR load access rights 807LBA logical block addressing 808LBNF labeled backus-naur form 809LBS location-based service 810LCD liquid crystal display 811LCP link control protocol 812LDA local delivery agent 813LDAP Lightweight Directory Access Protocol 814LDR light-dependent resistor 815LDT local descriptor table 816LE logical extent 817LED light emitting diode 818LELL low energy link layer 819LER label edge router 820LF line feed 821LF low frequency 822LFM lowest frequency mode 823LFN long file names 824LFO low-frequency oscillation 825LFS log-structured file system 826LFU least frequently used 827LHP loop heat pipe 828LIF logical interchange format 829LIFO last in, first out 830LILO LInux LOader 831LILO last in, last out 832LINT local interrupt 833LIR local Internet registry 834LISP LISt Processor 835LISP Locator/ID Separation Protocol 836LKM {Linux,loadable} kernel module 837LKML Linux kernel mailing list 838LL load linked 839LL/SC load linked/store conditional 840LLC logical link control 841LLD low-level design 842LLDD low-level design document 843LLDP link layer discovery protocol 844LLF low level format 845LLMNR link-local multicast name resolution 846LLVM Low Level Virtual Machine 847LM long mode 848LMCE local machine check exception 849LMI local management interface 850LMM link management mode 851LMP link management protocol 852LNO loop nest optimization 853LOC lines of code 854LOM lights-out management 855LPE Linux performance events 856LPC low pin count 857LPS local positioning system 858LRC longitudinal redundancy check 859LRM left-to-right mark 860LRO left-to-right override 861LRU least recently used 862LS link state 863LSAN Leak Sanitizer 864LSB Linux standards base 865LSB least significant {bit,byte} 866LSI large scale integration 867LSL load segment limit 868LSM log structured merge 869LSN Large Scale NAT 870LSN log sequence number 871LSR label switch router 872LTCC low temperature co-fired ceramic 873LTO linear tape-open 874LTO link time optimization 875LTR left to right 876LTR load task register 877LTR letter(-sized paper) 878LTS long term support 879LUA Lua Uppercase Accident 880LUN logical unit number 881LV logical volume 882LVM logical volume management 883LVT local vector table 884LVDS Low-Voltage Differential Signaling 885LWP light-weight process 886LZSS Lempel Ziv Storer Szymanski 887LZW Lempel Ziv Welch 888MAB MAC authentication bypass 889MAC mandatory access control 890MAC {media,medium} access control 891MAC message authentication {check,code} 892MADT multiple APIC descriptor table 893MAMR microwave-assisted magnetic recording 894MB megabyte 895MBA multi-boot agent 896MBR master boot record 897MBS megabits per second 898MC memory controller 899MCA machine check architecture 900MCA MicroChannel architecture 901MCC multiversion concurrency control 902MCE machine check exception 903MCGA Multi-Color Graphics Array 904MCH memory controller hub 905MCLAG multi-chassis link aggregation 906MCM multi-chip module 907MCQ memory controlled queue 908MD machine-dependent 909MD-SAL model-driven service abstraction layer 910MDA mail delivery agent 911MDA Monochrome Display Adapter 912MDC Management Data Clock 913MDI Medium Dependent Interface 914MDI-X Medium Dependent Interface Crossover 915MDIO Management Data Input/Output 916MDMX MIPS Digital Media eXtension 917MDRAM multibank dynamic random access memory 918MESI modified, exclusive, shared, invalid 919MFC merge from current 920MFC Microsoft Foundation Classes 921MFM modified frequency modulation 922MFU most frequently used 923MGCP media gateway control protocol 924MHU message handling unit 925MI machine-independent 926MI machine interface 927MIB management information base 928MIC message integrity {check,code} 929MID mobile Internet device 930MIDI musical instrument digital interface 931MIF management information format 932MII media independent interface 933MIM man in the middle 934MIMD multiple instruction, multiple data 935MIME Multipurpose Internet Mail Extensions 936MIMO multiple input multiple output 937MIPS million instructions per second 938MIPS Microprocessor without Interlocked Pipeline Stages 939MISD multiple instruction, single data 940MIT Massachusetts Institute of Technology 941MITM man in the middle 942ML machine language 943ML machine learning 944ML mailing list 945ML markup language 946ML maximum likelihood 947MLC multi-level cell 948MLD multicast listener discovery 949MLHP micro loop heat pipe 950MMF multi-mode fiber 951MMIC monolithic microwave integrated circuit 952MMIO memory mapped input/output 953MMORPG massive multiplayer online role playing game 954MMRP multiple MAC registration protocol 955MMU memory management unit 956MMX matrix math extension 957MMX multimedia extension 958MMX multiple math extension 959MO magneto-optical 960MOESI modified, owned, exclusive, shared, invalid 961MOF maximum operating frequency 962MOSFET metal-oxide-semiconductor field-effect transistor 963MOSI modified, owned, shared, invalid 964MP multi-platform 965MP multiplayer 966MP {multiprocessing,multiprocessor} 967MPEG moving picture experts group 968MPI message passing interface 969MPLS Multiprotocol Label Switching 970MPP massively parallel processor 971MPS memory pool system 972MPS multiprocessor specification 973MQTT Message Queuing Telemetry Transport 974MR modem ready 975MRO method resolution order 976MRP multiple registration protocol 977MRU most recently used 978MS Microsoft 979MSAN Memory Sanitizer 980MSB most significant {bit,byte} 981MSC message sequence chart 982MSE mean square error 983MSF minutes seconds frames 984MSI message signaled interrupt 985MSI modified, shared, invalid 986MSR {machine state,model-specific} register 987MSS maximum segment size 988MSTP Multiple Spanning Tree Protocol 989MT machine translation 990MTA mail transfer agent 991MTBF mean time between failures 992MTP media transfer protocol 993MTRR memory type range register 994MTTF mean time to failure 995MTU maximum transmission unit 996MUA mail user agent 997MUD multi-user domain 998MVCC multiversion concurrency control 999MVR multicast VLAN registration 1000MVRP multiple VLAN registration protocol 1001MWE module width encoding 1002MX mail exchange 1003NACK negative acknowledgement 1004NAK negative acknowledgement 1005NAN not a number 1006NAPT Network Address Port Translation 1007NAS network attached storage 1008NAT network address translation 1009NAV network allocation vector 1010NC numerical control 1011NC-SI network controller sideband interface 1012NCO numerically-controlled oscillator 1013NCP Network Control Protocol 1014NCSI network connectivity status indicator 1015NCQ native command queuing 1016ND neighbor discovery 1017NDFA nondeterministic finite automaton 1018NDIS network driver interface specification 1019NE numeric error 1020NEWS Network extensible Window System 1021NFA nondeterministic finite automaton 1022NFC near-field communication 1023NFCI no functional change intended 1024NFS network file system 1025NFV network function virtualization 1026NIA next instruction address 1027NIC network information center 1028NIC network interface card 1029NIDS network intrusion detection system 1030NIP network interface protocol 1031NIPS network intrusion prevention system 1032NIS network information service 1033NIST National Institute of Standards and Technology 1034NLS native language support 1035NMI non-maskable interrupt 1036NNTP Network News Transfer Protocol 1037NOC network operations center 1038NOP no operation 1039NOS network operating system 1040NP nondeterministic polynomial time 1041NRND not recommended for new designs 1042NRZ non-return to zero 1043NSA nation-state adversary 1044NSA no such agency 1045NSA National Security Agency 1046NTM non-deterministic Turing machine 1047NTP Network Time Protocol 1048NUMA non-uniform memory access 1049NURBS non-uniform rational basis spline 1050NVMM NetBSD Virtual Machine Monitor 1051NVMM non-volatile main memory 1052NVRAM non-volatile random access memory 1053NW not write-through 1054NX no execute 1055OAEP optimal asymmetric encryption padding 1056OAM operations, administration, and {management,maintenance} 1057OBO off by one 1058OBOE off by one error 1059OCL object constraint language 1060OCR optical character recognition 1061ODE offline device environment 1062ODI open data-link interface 1063ODM object data manager 1064ODCM on-demand clock modulation 1065ODT on-die termination 1066OEM original equipment manufacturer 1067OFB output feedback 1068OFDM orthogonal frequency division multiplexing 1069OFET organic field-effect transistor 1070OLAP online analytical processing 1071OLE object linking and embedding 1072OLTP online transaction processing 1073ONFI open nand flash interface 1074OO OpenOffice 1075OO object oriented 1076OOB out of band 1077OOE out of order execution 1078OOM out of memory 1079OOO OpenOffice.org 1080OOP object oriented programming 1081OOPS object oriented programming systems 1082OOSE object oriented software engineering 1083OPM operations per minute 1084OPS operations per second 1085OQL Object Query Language 1086ORB object request broker 1087ORM object-relational mapping 1088OS operating system 1089OSD open source definition 1090OSF open software foundation 1091OSI Open Source Initiative 1092OSI open systems interconnection 1093OSPF open shortest path first 1094OSPM OS power management 1095OSS open sound system 1096OSS open source software 1097OSVW operating system visible workarounds 1098OTP one time password 1099OTP open telecom platform 1100OU organizational unit 1101OUI organizationally unique identifier 1102OWL Web Ontology Language 1103P2P PCI to PCI 1104P2P peer to peer 1105PA phase accumulator 1106PA physical address 1107PAAS platform as a service 1108PAC phase-amplitude converter 1109PAE physical address extension 1110PAGP port aggregation protocol 1111PAL phase alternating line 1112PAL programmable array logic 1113PAM pluggable authentication modules 1114PAM pulse amplitude modulation 1115PAP password authentication protocol 1116PAT page attribute table 1117PAT port address translation 1118PATA parallel ATA 1119PAX portable archive exchange 1120PBE pending break encoding 1121PBE programming by example 1122PC personal computer 1123PC program counter 1124PCB printed circuit board 1125PCB process control block 1126PCB Protocol Control Block 1127PCC Portable C Compiler 1128PCD page-level cache disable 1129PCE path computation element 1130PCE performance-monitor counter enable 1131PCEP Path Computation Element Protocol 1132PCH platform controller hub 1133PCI peripheral component interconnect 1134PCM phase change memory 1135PCM pulse code modulation 1136PCMCIA Personal Computer Memory Card International Association 1137PCP Port Control Protocol 1138PD public domain 1139PDA personal digital assistant 1140PDA pushdown automaton 1141PDAG propositional directed acyclic graph 1142PDB power distribution board 1143PDF portable document format 1144PDM pulse-duration modulation 1145PDN pull-down network 1146PDP page {descriptor,directory} page 1147PDS product data sheet 1148PDU protocol data unit 1149PE protection enable 1150PE provider edge 1151PEAP Protected EAP 1152PECI platform environment control interface 1153PEP protocol extension protocol 1154PER packed encoding rules 1155PFS perfect forward secrecy 1156PGAS partitioned global address space 1157PGE page global enable 1158PGP Pretty Good Privacy 1159PHB PCI host bridge 1160PHP PHP: Hypertext Preprocessor 1161PIC performance instrumentation counters 1162PIC position independent code 1163PIC programmable interrupt controller 1164PICNIC problem in chair, not in computer 1165PID process id 1166PIE position independent executable 1167PIL Priority Interrupt Level 1168PIM personal information manager 1169PIM platform-independent model 1170PIO programmed input/output 1171PIPT physically indexed, physically tagged 1172PIQ prefetch input queue 1173PIT programmable interrupt timer 1174PIV personal identity verification 1175PIX Private Internet eXchange 1176PKCS public-key cryptography standards 1177PKI public key infrastructure 1178PLC programmable logic controller 1179PLD programmable logic device 1180PLL phase locked loop 1181PLRU pseudo LRU 1182PLTM package level thermal management 1183PM power management 1184PM {phase,pulse} modulation 1185PMC performance monitoring counters 1186PME power management event 1187PMEG page map entry group 1188PMI performance monitoring infrastructure 1189PMI platform management interrupt 1190PMIC power management integrated circut 1191PMIO port-mapped input/output 1192PMT photo-multiplier tube 1193PMU performance monitoring units 1194PMU power management unit 1195PNG portable network graphics 1196PNP plug and play 1197POE power over ethernet 1198POF probability of failure 1199POP Post Office Protocol 1200POP power on password 1201POR plan of record 1202POSIX Portable Operating System Interface [for Unix] 1203POST power on self test 1204POTS plain old telephone system 1205POWER Performance Optimization With Enhanced RISC 1206POWERPC Performance Optimization With Enhanced RISC - Performance Computing 1207PP pair programming 1208PPB PCI [to] PCI bridge 1209PPC PowerPC 1210PPC Power Performance Computing 1211PPI pixels per inch 1212PPM pages per minute 1213PPP Point-to-Point Protocol 1214PPPOA Point-to-Point Protocol over ATM 1215PPPOE Point-to-Point Protocol over Ethernet 1216PPR processor programming reference 1217PPU physics processing unit 1218PRAM Parameter RAM 1219PRBS pseudorandom bit sequence 1220PRG pseudorandom generator 1221PRF pseudorandom function [family] 1222PRML partial response, maximum likelihood 1223PRN pseudorandom {noise,number} 1224PRNG pseudorandom number generator 1225PROM programmable read only memory 1226PRP pseudorandom permutation 1227PRU Programmable Realtime Unit 1228PS PostScript 1229PSD power spectral density 1230PSE page size extensions 1231PSK phase shift keying 1232PSK pre-shared key 1233PSTN public switched telephone network 1234PSW program status word 1235PTE page table entry 1236PTLA pseudo top level aggregator 1237PTP page table page 1238PTV perceived target value 1239PU processing unit 1240PUC personal unblocking code 1241PUN physical unit number 1242PV physical volume 1243PVC permanent virtual circuit 1244PVG physical volume group 1245PVI protected-mode virtual interrupt 1246PVRST Per-VLAN rapid spanning tree 1247PVST Per-VLAN Spanning Tree 1248PWM pulse width modulation 1249PXE preboot execution environment 1250QA quality assurance 1251QAM quadrature amplitude modulation 1252QAM quality assurance management 1253QBE query by example 1254QC quality control 1255QDI quasi delay insensitive 1256QCIF quarter common intermediate format 1257QOS quality of service 1258QVL qualified vendor list 1259R/O read only 1260R/W read/write 1261RA receiver address 1262RA remote assistance 1263RA resource affinity 1264RA router advertisement 1265RAD rapid application development 1266RADIUS remote authentication dial-in user service 1267RAID redundant array of {independent,inexpensive} disks 1268RAM random access memory 1269RAS reliability, availability and serviceability 1270RAS remote access service 1271RAS restartable atomic sequence 1272RAS row address strobe 1273RBF radial basis function 1274RBNF routing backus-naur form 1275RBT red-black tree 1276RC release candidate 1277RC remote control 1278RC run commands 1279RCS Revision Control System 1280RCS revision control system 1281RCU read, copy, update 1282RDB Rigid Disk Block 1283RDBMS relational database management system 1284RDF Resource Description Framework 1285RDM relational data model 1286RDMA remote direct memory access 1287RDP remote desktop protocol 1288RDRAM Rambus DRAM 1289RE regular expression 1290REPL read, evaluate, print, loop 1291REST representational state transfer 1292RF radio frequency 1293RFB remote frame buffer 1294RFI radio frequency interference 1295RFO request for ownership 1296RFU reserved for future use 1297RGB red green blue 1298RGBA red green blue alpha 1299RGMII reduced gigabit media independent interface 1300RH read hit 1301RHEL Red Hat Enterprise Linux 1302RHL Red Hat Linux 1303RIB routing information base 1304RIFF Resource Interchange File Format 1305RIP Raster Image Processor 1306RIP Routing Information Protocol 1307RIR regional Internet registry 1308RISC reduced instruction set {computer,computing} 1309RKM ROM Kernel Manual 1310RLE run length encoding 1311RLL run length limited 1312RLO right-to-left override 1313RM read miss 1314RMCP Remote Management Control Protocol 1315RMI remote method invocation 1316RMO Relaxed Memory Ordering 1317RMPM rapid memory power management 1318RMS root mean square 1319RMW read, modify, write 1320RNG random number generator 1321ROM read only memory 1322RPC remote procedure call 1323RPKI resource PKI 1324RPL requested privilege level 1325RPM revolutions per minute 1326RPN reverse Polish notation 1327RPVST Rapid Per-VLAN Spanning Tree 1328RR random replacement 1329RR round robin 1330RS relay station 1331RSA Rivest, Shamir, [and] Adleman 1332RSIP Realm Specific IP 1333RSN Robust Secure Network 1334RSS really simple syndication 1335RSS residual sum of squares 1336RSTP Rapid Spanning Tree Protocol 1337RT real time 1338RTC real time clock 1339RTC real time computing 1340RTF rich text format 1341RTL register transfer language 1342RTL resistor-transistor logic 1343RTL right to left 1344RTOS real time operating system 1345RTS request to send 1346RTT round trip time 1347RUP rational unified process 1348RW Rabin-Williams 1349RWM read-write memory 1350RX {receive,receiver} 1351S/PDIF Sony/Philips Digital Interface Format 1352SA security advisory 1353SA security association 1354SA source address 1355SA structured analysis 1356SAAS software as a service 1357SABRE Semi-automated business research environment 1358SACD super audio compact disc 1359SAD security association database 1360SAF-TE SCSI accessed fault-tolerant enclosure 1361SAGE Semi-automated ground environment 1362SAL {service,system} abstraction layer 1363SAM serial access memory 1364SAM sum addressed memory 1365SAML security assertion markup language 1366SAN storage area network 1367SAP service access point 1368SAPIC streamlined advanced programmable interrupt controller 1369SASD structured analysis, structured design 1370SASI Shugart Associates System Interface 1371SASL simple authentication [and] security layer 1372SATA serial advanced technology attachment 1373SAX simple API for XML 1374SB sound blaster 1375SBSA server base system architecture 1376SBU standard build unit 1377SC store conditional 1378SCA source code analyzer 1379SCADA supervisory control and data acquisition 1380SCC single chip cloud 1381SCC source code control 1382SCCP skinny call control protocol 1383SCCS Source Code Control System 1384SCI scalable coherent interface 1385SCI system control interrupt 1386SCM software configuration management 1387SCM source code management 1388SCM storage-class memory 1389SCO synchronous connection orientated 1390SCP secure copy 1391SCP system control processor 1392SCPI system control and power interface 1393SCSI Small Computer System Interface 1394SCTP Stream Control Transmission Protocol 1395SDDC software defined data center 1396SDEI software delegated exception interface 1397SDI symbol deinterleave 1398SDK software development kit 1399SDL Simple Declarative Language 1400SDL Simple Direct-media Layer 1401SDLC {software,system,systems} development life cycle 1402SDN software defined networking 1403SDP Session Description Protocol 1404SDRAM synchronous dynamic random access memory 1405SDS software defined storage 1406SDT syntax-directed translation 1407SEA synchronous external abort 1408SEGV segmentation violation 1409SED self-encrypting drive 1410SED stream editor 1411SEMB serial ATA enclosure management bridge 1412SEO search engine optimization 1413SES SCSI enclosure services 1414SFC sequential function chart 1415SFI simple firmware interface 1416SFI software fault isolation 1417SFTP SSH File Transfer Protocol 1418SFTP Serial File Transfer Protocol 1419SFTP Simple File Transfer Protocol 1420SGI Silicon Graphics, Inc 1421SGI software generated interrupt 1422SGMII serial gigabit media independent interface 1423SGPIO serial general purpose input/output 1424SGRAM synchronous graphics random access memory 1425SHA secure hash algorithm 1426SIDH supersingular isogeny Diffie-Hellman 1427SIEM security information and event management 1428SIF source input format 1429SIFS short inter-frame space 1430SIM subscriber identity module 1431SIMD single instruction, multiple data 1432SIMM single inline memory module 1433SIP Session Initiation Protocol 1434SIR signal-to-interference ratio 1435SIR slow infrared 1436SISD single instruction, single data 1437SLAAC stateless address auto-configuration 1438SLC single-level cell 1439SLDRAM synchronous-link dynamic random access memory 1440SLED single large expensive disk 1441SLI scalable link interface 1442SLI scan-line interleave 1443SLIC system license internal code 1444SLOC source lines of code 1445SLRU segmented LRU 1446SMA smart memory access 1447SMAF system management action field 1448SMAP Simple Mail Access Protocol 1449SMAP supervisor mode access prevention 1450SMART self-monitoring analysis and reporting technology 1451SMB Server Message Block 1452SMB system management bus 1453SMBIOS System Management BIOS 1454SMC system management controller 1455SMD storage module device 1456SMEP supervisor mode execution protection 1457SMF single mode fiber 1458SMI structure of management information 1459SMI system management interrupt 1460SMM system management mode 1461SMP serial management protocol 1462SMP symmetric multiprocessing 1463SMT simultaneous multithreading 1464SMTP Simple Mail Transfer Protocol 1465SMU system management unit 1466SNA systems network architecture 1467SNAP Sub-Network Access Protocol 1468SNIA Storage Networking Industry Association 1469SNMP Simple Network Management Protocol 1470SNR signal-to-noise ratio 1471SOA service oriented architecture 1472SOAP Simple Object Access Protocol 1473SOC system on chip 1474SOF start of frame 1475SOH start of header 1476SOHO small office/home office 1477SOL serial over LAN 1478SOM system on module 1479SP service pack 1480SP stack pointer 1481SPA storage pool allocator 1482SPAN switched port analyzer 1483SPARC scalable processor architecture 1484SPARQL SPARQL Protocol and RDF Query Language 1485SPD security policy database 1486SPD serial presence detect 1487SPDIF Sony/Philips digital interface format 1488SPI serial peripheral interface 1489SPI stateful packet inspection 1490SPL system interrupt priority level 1491SPL spinlock 1492SPMD single process, multiple data 1493SPR special purpose register 1494SPT sectors per track 1495SQA software quality assurance 1496SQCIF sub quarter common intermediate format 1497SQL Structured Query Language 1498SRAM static random access memory 1499SRC sample rate conversion 1500SRP SCSI RDMA protocol 1501SRR shaped round robin 1502SS self-snoop 1503SS stack segment 1504SSA static single assignment 1505SSAP source service access point 1506SSB single-sideband modulation 1507SSC spread spectrum clock 1508SSD solid state drive 1509SSE streaming SIMD extensions 1510SSFDC solid state floppy disc card 1511SSH secure shell 1512SSI server side includes 1513SSID service set identifier 1514SSL secure sockets layer 1515SSP stack smashing protection 1516STC software thermal control 1517STD state transition diagram 1518STOMP Streaming Text Oriented Messaging Protocol 1519STP Spanning Tree Protocol 1520STP shielded twisted pair 1521STRG spanning tree root guard 1522SUN Stanford University Network 1523SUS Single Unix Specification 1524SUT system under test 1525SVC switched virtual circuit 1526SVG scalable vector graphics 1527SVGA Super Video Graphics Array 1528SVI {switch,switched} virtual interface 1529SVM secure virtual machine 1530SVM support vector machine 1531SVR System V Release 1532SVS Separate Virtual Space 1533SWF Shockwave Flash 1534SWIG simplified wrapper [and] interface generator 1535SYR symbol timing recovery 1536TA test assertion 1537TA transmitter address 1538TACACS terminal access controller access-control system 1539TAI international atomic time 1540TAO track at once 1541TAOCP The Art of Computer Programming 1542TAP Test Anything Protocol 1543TAS test and set 1544TB terabyte 1545TBNF transitional backus-naur form 1546TCB trace capture buffer 1547TCB trusted computing base 1548TCC thermal control circuit 1549TCL tool command language 1550TCP Transmission Control Protocol 1551TCQ tagged command queueing 1552TDC time [to] digital converter 1553TDD test-driven development 1554TDD time division duplex 1555TDM time division multiplexing 1556TDMA time division multiple access 1557TDOA time difference of arrival 1558TDP thermal design {point,power} 1559TDR time-domain reflectometry 1560TECO Text Editor and Corrector 1561TFT thin film transistor 1562TFTP Trivial File Transfer Protocol 1563TIAS try it and see 1564TIFF tagged image file format 1565TITS try it to see 1566TK temporal key 1567TKIP Temporal Key Integrity Protocol 1568TLA top level aggregator 1569TLB translation lookaside buffer 1570TLD top level domain 1571TLER time-limited error recovery 1572TLI transport layer interface 1573TLS thread local storage 1574TLS transport layer security 1575TM Turing machine 1576TM thermal monitor 1577TMG transmogrifier 1578TMDS transition minimized differential signaling 1579TMO timeout 1580TOD time of day 1581TOS terms of service 1582TOS trusted operating system 1583TOS type of service 1584TP transaction processing 1585TPI tracks per inch 1586TPM transactions per minute 1587TPM trusted platform module 1588TPR task priority register 1589TPS transactions per second 1590TPS transmission parameters signaling 1591TR task register 1592TR token ring 1593TRL timing recovery loop 1594TRNG true random number generator 1595TS terminal services 1596TS time series 1597TS time stamp 1598TS transport stream 1599TSAN Thread Sanitizer 1600TSC time stamp counter 1601TSD time stamp disable 1602TSDB time series database 1603TSL test, set, lock 1604TSO time sharing option 1605TSO Total Store Ordering 1606TSP Time-Stamp Protocol 1607TSP Tunnel Setup Protocol 1608TSP time synchronization protocol 1609TSP traveling salesman problem 1610TSS task state segment 1611TTL time to live 1612TTL transistor-transistor logic 1613TTM translation table maps 1614TTY teletype 1615TUI {terminal,text-based,textual} user interface 1616TX {transmit out,transmitter} 1617TXG transaction group 1618TZ time zone 1619UAC user {access,account} control 1620UAF use-after-free 1621UART universal asynchronous receiver/transmitter 1622UAT user acceptance testing 1623UB undefined behavior 1624UBSAN Undefined Behavior Sanitizer 1625UC uncacheable 1626UCS uniform-cost search 1627UCS unified computing system 1628UCS universal coded character set 1629UDI uniform driver interface 1630UDMA ultra DMA 1631UDO ultra density optical 1632UDP User Datagram Protocol 1633UEFI unified extensible firmware interface 1634UFS Unix File System 1635UGA universal graphics adapter 1636UI unit interval 1637UI user interface 1638UICC universal integrated circuit card 1639UID unique identifier 1640UID user identifier 1641UL upload 1642UMA uniform memory access 1643UMA upper memory area 1644UMB upper memory block 1645UML unified modeling language 1646UMPC ultra-mobile PC 1647UPNP universal plug and play 1648UPS uninterruptible power supply 1649URI uniform resource identifier 1650URL uniform resource locator 1651URN uniform resource name 1652USART universal synchronous/asynchronous receiver/transmitter 1653USB universal serial bus 1654USWC uncacheable speculative write combining 1655UT unit test 1656UTC coordinated universal time 1657UTF unicode transformation formats 1658UTP unshielded twisted pair 1659UUCP Unix-to-Unix Copy Protocol 1660UUID universally unique identifier 1661UUOC useless use of cat 1662UUT unit under test 1663UX user experience 1664VA vertical alignment 1665VA virtual address 1666VA volt-ampere 1667VAX virtual address extension 1668VB Visual Basic 1669VCA variable-gain amplifier 1670VCC common collector voltage 1671VCCP virtual chassis control protocol 1672VCF voltage-controlled filter 1673VCM virtual channel memory 1674VCO voltage-controlled oscillator 1675VCP virtual chassis port 1676VCS version control system 1677VDPAU Video Decode and Presentation API for Unix 1678VES virtual execution system 1679VESA Video Electronics Standards Association 1680VFO variable-frequency oscillator 1681VFS virtual file system 1682VG volume group 1683VGA Video Graphics Array 1684VHDCI very high density cable interconnect 1685VID {VLAN,voltage level} identifier 1686VIM Vi IMproved 1687VIPT virtually indexed, physically tagged 1688VIVT virtually indexed, virtually tagged 1689VLAN virtual local area network 1690VLD variable-length decoding 1691VLIW very long instruction word 1692VLSI very large scale integration 1693VLSM variable length subnet mask 1694VM virtual {machine,memory} 1695VME virtual mode extension 1696VMX vector multimedia extensions 1697VMX virtual machine extensions 1698VNC virtual network computing 1699VOD video on demand 1700VPD vital product data 1701VPN virtual private network 1702VPWS virtual private wire service 1703VR virtual reality 1704VRAM video random access memory 1705VRF virtual routing and forwarding 1706VRM voltage regulator module 1707VROC Virtual RAID On CPU 1708VRRP Virtual Router Redundancy Protocol 1709VSTP VLAN Spanning Tree Protocol 1710VTP VLAN Trunking Protocol 1711VXFS Veritas file sytem 1712VXVM Veritas volume manager 1713W watt 1714W3C World Wide Web Consortium 1715WAFL write anywhere file layout 1716WAMP Web Application Messaging Protocol 1717WAN wide area network 1718WAP Wireless Application Protocol 1719WAP wireless access point 1720WDM Windows Driver Model 1721WDDM Windows Display Driver Model 1722WDT watchdog timer 1723WEP Wired Equivalent Privacy 1724WFI wait for interrupt 1725WFQ weighted fair queuing 1726WH write hit 1727WHEA Windows hardware error architecture 1728WIFI wireless fidelity 1729WLAN wireless local area network 1730WM write miss 1731WMI Windows Management Instrumentation 1732WOL Wake-on-LAN 1733WOM Wake-on-Modem 1734WOR Wake-on-Ring 1735WORM write once read many 1736WP WordPerfect 1737WP word processor 1738WP write protect 1739WPA Wi-Fi Protected Access 1740WPA2 Wi-Fi Protected Access II 1741WPAD web proxy auto-discovery protocol 1742WPS Wi-Fi Protected Setup 1743WRAM window random access memory 1744WS web services 1745WTC write through caching 1746WTD weighted tail drop 1747WWAN wireless wide area network 1748WWW world wide web 1749WYSIAYG what you see is all you get 1750WYSIWYG what you see is what you get 1751XBAR crossbar 1752XDMCP X Display Manager control protocol 1753XER XML encoding rules 1754XGA Extended Graphics Array 1755XHR XMLHttpRequest 1756XIP execute in place 1757XML Extensible Markup Language 1758XNA XNA's not acronymed 1759XNS Xerox network systems 1760XOR exclusive or 1761XP extreme programming 1762XSI X/Open System Interface 1763XSL extensible stylesheet language 1764XSLT extensible stylesheet language transformations 1765XSS cross site scripting 1766XT extended technology 1767XTACACS extended terminal access controller access-control system 1768XTI X/Open transport interface 1769XUL XML user interface language 1770YACC yet another compiler compiler 1771YAML YAML ain't markup language 1772YANG yet another next generation 1773YAWPFAPR you are welcome; please file a problem report 1774YP Yellow Pages 1775YTD year to date 1776ZAP ZFS attribute processor 1777ZBR zone bit recording 1778ZFOD zero-filled on demand 1779ZFS zettabyte file system 1780ZIF zero insertion force 1781ZIFS zero insertion force socket 1782ZIL ZFS intent log 1783ZMA zone multicast address 1784ZOI zero one infinity 1785ZOI zone of influence 1786ZPL ZFS Posix layer 1787ZVOL ZFS Volume 1788