acronyms.comp revision 1.167
1$NetBSD: acronyms.comp,v 1.167 2016/08/11 02:42:28 ginsbach 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 8ABR available bit rate 9AC alternating current 10ACI adjacent channel interferer 11ACID atomicity, consistency, isolation, durability 12ACK Amsterdam compiler kit 13ACK acknowledgement 14ACL access control list 15ACL active current loop 16ACP auxillary control {process,program} 17ACPI advanced configuration and power interface 18ACS access control set 19ACU automatic calling unit 20ADB Apple desktop bus 21ADC analog [to] digital converter 22ADD acronym driven development 23ADO active data objects 24ADP automatic data processing 25ADPCM adaptive differential pulse code modulation 26ADS alternate data stream 27ADSL asymmetric digital subscriber line 28ADT abstract data type 29AES Advanced Encryption Standard 30AFS Andrew File System 31AGC automatic gain control 32AGP accelerated graphics port 33AI analog input 34AI artificial intelligence 35AL access list 36AL active link 37ALE address latch enable 38ALS ambient light sensor 39ALU arithmetic and logical unit 40ALUA asymmetric logical unit access 41AM access method 42AM alignment mask 43AM amplitude modulation 44AMI alternate mark inversion 45AMQP advanced message queuing protocol 46AMT active management technology 47AN Arabic number 48ANSI American National Standards Institute 49AO analog output 50AOL Alert-on-LAN 51AOS add or subtract 52AP access point 53AP application processor 54API application programming interface 55APIC advanced programmable interrupt controller 56APIPA automatic private IP addressing 57APT advanced persistent threat 58AQM active queue management 59ARAT always running APIC timer 60ARC adaptive replacement cache 61ARM Advanced RISC Machines 62ARP Address Resolution Protocol 63ARPA Advanced Research Projects Agency 64ARQ automatic repeat request 65ARR address range register 66ARU audio response unit 67AS autonomous system 68ASC advanced smart cache 69ASCII American Standard Code for Information Interchange 70ASD agile software development 71ASE advanced software environment 72ASIC application-specific integrated circuit 73ASK amplitude shif keying 74ASLR address space layout randomization 75ASN autonomous system number 76ASPM active state power management 77ASQ automated software quality 78ASR address space register 79AST abstract syntax tree 80AST asynchronous trap 81AT access time 82AT advanced technology 83ATA advanced technology attachment 84ATAPI advanced technology attachment packet interface 85ATC address translation cache 86ATM asynchronous transfer mode 87ATX advanced technology extended 88AV anti virus 89AVL Adelson-Velsky-Landis 90AVX advanced vector extensions 91BA byte align 92BAL basic assembly language 93BAR base address register 94BBS bulletin board system 95BCC blind carbon copy 96BCD binary coded decimal 97BCR byte count register 98BCS base configuration space 99BD baud 100BDD binary decision diagram 101BDI bit deinterleave 102BDUF big design up front 103BEDO burst extended data output 104BER basic encoding rules 105BER bit error {rate,ratio} 106BFD binary {file,format} descriptor 107BFKL big fscking kernel lock 108BFS breadth-first search 109BFT binary file transfer 110BGA ball grid array 111BGP Border Gateway Protocol 112BGPSEC BGP Security 113BIND Berkeley Internet Name Daemon 114BIOS Basic Input/Output System 115BIOS built-in operating system 116BIST built-in self-test 117BIU bus interface unit 118BKDG BIOS and kernel developer's guide 119BLAS basic linear algebra subprograms 120BLC back light control 121BLOB binary large object 122BM bus master 123BMC baseboard management controller 124BMIC bus master interface controller 125BN boundary neutral 126BNF Backus-Naur form 127BO binary output 128BOF beginning of file 129BOM beginning of message 130BOM byte order mark 131BP base pointer 132BP boot processor 133BPB BIOS parameter block 134BPDU bridge protocol data unit 135BPF Berkeley Packet Filter 136BPI bits per inch 137BPM business process modelling 138BPS bits per second 139BPSK binary phase shift keying 140BQS Berkeley quality software 141BRE basic regular expression 142BS backspace 143BS binary sequence 144BSA basic service area 145BSD Berkeley Software Distribution 146BSF bit scan forward 147BSOD blue screen of death 148BSP binary space partition 149BSP bootstrap processor 150BSR bit scan reverse 151BSS basic service set 152BSS block started by symbol 153BSSID basic service set identifier 154BT BitTorrent 155BT Bluetooth 156BT bit test 157BTC bit test [and] complement 158BTR bit test [and] reset 159BTS bit test [and] set 160BTS bits per second 161BW bandwidth 162BWM block-write mode 163CA certificate authority 164CAD computer-aided design 165CAM computer assisted manufacturing 166CAM conditional access module 167CAM content addressable memory 168CARP Common Address Redundancy Protocol 169CAS column address strobe 170CAS compare and swap 171CAS computer algebra system 172CASE computer aided software engineering 173CAU control access unit 174CAV constant angular velocity 175CBC cipher block chaining 176CBR constant bit rate 177CC carbon coby 178CCD charge coupled device 179CCI co-channel interferer 180CD cache disable 181CD compact disc 182CDDA compact disc digital audio 183CDMA code division multiple access 184CDP Cisco Discovery Protocol 185CDRAM cache dynamic random access memory 186CER canonical encoding rules 187CF compact flash 188CFG context-free grammar 189CFG control-flow graph 190CG control gate 191CGA Color Graphics Adapter 192CGI common gateway interface 193CGN Carrier-Grade NAT 194CHAP Challenge-Handshake Authentication Protocol 195CHS cylinder/head/sector 196CI continuous integration 197CI {common,component} interface 198CIDR Classless Inter-Domain Routing 199CIFS Common Internet File System 200CIL common intermediate language 201CIR carrier-to-interference ratio 202CIS contact image sensor 203CISC complex instruction set {computer,computing} 204CJK Chinese, Japanese, [and] Korean 205CLF common log format 206CLI command line interface 207CLR common language runtime 208CLTT closed loop thermal throttling 209CLUT color look-up table 210CLV constant linear velocity 211CM configuration management 212CMA concert multithread architecture 213CMI control management interface 214CMI control method interface 215CMOS complementary metal-oxide-semiconductor 216CMP chip multi-processing 217CMS content management system 218CMYK cyan magenta yellow black 219CN {common,canonical} name 220CNC computer numerical control 221CNR carrier-to-noise ratio 222COF current operating frequency 223COFDM coded orthogonal frequency division multiplexing 224COFF common object file format 225COM component object model 226COMA cache-only memory architecture 227CORBA common object request broker architecture 228COW copy-on-write 229CP continuous pilot 230CPB core performance boost 231CPE common phase error 232CPG clock pulse generator 233CPL current privilege level 234CPLD complex programmable logic device 235CPP C preprocessor 236CPS characters per second 237CPT command pass through 238CPU central processing unit 239CR carriage return 240CRC cyclic redundancy check 241CRL carrier recovery loop 242CRLF carriage return line feed 243CRT cathode ray tube 244CS cable select 245CS chip select 246CS code segment 247CS computer science 248CSI channel state information 249CSI common system interface 250CSMA carrier sense multiple access 251CSMA/CA carrier sense multiple access with collision avoidance 252CSMA/CD carrier sense multiple access with collision detection 253CSR control [and] status registers 254CSRG Computer Systems Research Group 255CSS cascading style sheets 256CSV comma-separated values 257CTM close to metal 258CTS clear to send 259CUA common user access 260CUT coordinated universal time 261CV control voltage 262CVS Concurrent Versions System 263DA destination address 264DAA distributed application architecture 265DAB digital audio broadcasting 266DAC digital [to] analog converter 267DAC discretionary access control 268DAD duplicate address detection 269DANE DNS-based Authentication of Named Entities 270DAO disk at once 271DAP Directory Access Protocol 272DAT digital audio tape 273DAT dynamic acceleration technology 274DB database 275DBA database administrator 276DBA dynamic bandwidth allocation 277DBB data bus buffer 278DBC design by contract 279DBL dynamic buffer limiting 280DBMS database management system 281DBS database server 282DC direct current 283DCC Direct Client-to-Client 284DCC direct cable connect 285DCD data carrier detect 286DCE data control equipment 287DCE distributed computing environment 288DCOM distributed component object model 289DCOP Desktop COmmunication Protocol 290DCS data collection systems 291DCT discrete cosine transform 292DCU data cache unit 293DDC display data channel 294DDE dynamic data exchange 295DDK device driver kit 296DDL data description language 297DDR double data rate 298DDS direct digital sound 299DDWG Digital Display Working Group 300DE debugging extensions 301DE desktop environment 302DEA data encryption algorithm 303DEK data encryption key 304DEP data execution prevention 305DER distinguished encoding rules 306DES Data Encryption Standard 307DF don't fragment 308DFA deterministic finite automaton 309DFC data flow control 310DFS depth first search 311DFS distributed file system 312DFT diagnostic function test 313DFT discrete Fourier transform 314DGL data generation language 315DH Diffie-Hellman 316DHCP Dynamic Host Configuration Protocol 317DIFS distributed inter-frame space 318DIMM dual inline memory module 319DIRT design in real time 320DL diode logic 321DL discrete logarithm 322DL download 323DLE data link escape 324DLL dynamic link library 325DLP discrete logarithm problem 326DMA direct memory access 327DMI desktop management interface 328DMS document management system 329DMT discrete multitone modulation 330DNARD Digital network appliance reference design 331DND drag and drop 332DNS Domain Name System 333DNSSEC DNS Security Extensions 334DOE distributed object environment 335DOF data over fibre 336DOM document object model 337DOS denial of service 338DOS disk operating system 339DP DisplayPort 340DPC deferred procedure call 341DPCM differential pulse code modulation 342DPD dead peer detection 343DPI deep packet inspection 344DPI dots per inch 345DPL descriptor privilege level 346DPS Display PostScript 347DPST display power savings technology 348DRAM dynamic random access memory 349DRI direct rendering infrastructure 350DRM digital rights management 351DRRS display refresh rate switching 352DS debug store 353DSA digital signature algorithm 354DSAP destination service access point 355DSB double-sideband modulation 356DSDT differentiated system descriptor table 357DSL digital subscriber line 358DSL domain specific language 359DSLAM digital subscriber line access multiplexer 360DSN delivery status notification 361DSO dynamic shared object 362DSP digital signal processor 363DSSS direct sequence spread spectrum 364DTD document type definition 365DTE data terminal equipment 366DTE dumb terminal emulator 367DTL diode-transistor logic 368DTLS datagram transport layer security 369DTS digital thermal sensor 370DUT device under test 371DVB digital video broadcasting 372DVCS distributed version control system 373DVD digital versatile disc 374DVFS dynamic voltage and frequency scaling 375DVI device independent 376DVI Digital Visual Interface 377DVR digital video recorder 378E-XER extended XML encoding rules 379EABI embedded-application binary interface 380EAI Email Address Internationalization 381EAI Enterprise Application Integration 382EAP Extensible Authentication Protocol 383EAPOL EAP over Lan 384EBCDIC Extended Binary Coded Decimal Interchange Code 385EBR extended boot record 386EC elliptical curve 387ECC error correction code 388ECDL elliptical curve discrete logarithm 389ECDSA elliptical curve digital signature algorithm 390ECL emitter-coupled logic 391ECN explicit congestion notification 392ECP enhanced capability port 393ECS enhanced chip set 394ECS extended configuration space 395EDAT enhanced dynamic acceleration technology 396EDGE explicit data graph execution 397EDID extended display identification data 398EDO extended data out 399EDS electronical data sheet 400EEPROM electrically erasable programmable read only memory 401EFI extensible firmware interface 402EFL emitter follower logic 403EFM eight to fourteen modulation 404EGA Enhanced Graphics Adapter 405EGP exterior gateway protocol 406EH extension header 407EIDE enhanced IDE 408EISA extended industry standard architecture 409ELF executable and linking format 410ELS entry level system 411EMI electro-magnetic interference 412EMP electro-magnetic pulse 413EMR electro-magnetic radiation 414EOF end of file 415EOI end of interrupt 416EOL end of line 417EOT end of transmission 418EPIC explicitly parallel instruction computing 419EPP enhanced parallel port 420EPRML extended partial response, maximum likelihood 421EPROM erasable programmable read only memory 422ERD emergency recovery disk 423ERD entity relationship diagram 424ERE extended regular expression 425ESDRAM enhanced synchronous dynamic random access memory 426ESS electronic switching system 427ESS extended service set 428ESSID extended service set identifier 429EST enhanced speedstep 430ETL extract, transform, load 431EU execution unit 432EULA end user license agreement 433FAT file allocation table 434FBRAM frame buffer random access memory 435FCL fiber channel loop 436FCS frame check sequence 437FDC floppy disk controller 438FDD floppy disk drive 439FDDI fiber distributed data interface 440FDE full disk encryption 441FEA finite element analysis 442FEC forward error correction 443FET field-effect transistor 444FF form feed 445FFH functional fixed hardware 446FFI foreign function interface 447FFM focus follows mouse 448FFS Fast File System 449FFS find first set 450FFT fast Fourier transform 451FG floating gate 452FHSS frequency hop spread spectrum 453FID frequency identifier 454FIFO first in, first out 455FILO first in, last out 456FIR fast infrared 457FLOPS floating [point] operations per second 458FLOSS free/libre/open source software 459FM frequency modulation 460FMR false match rate 461FOSS free/open source software 462FPGA field programmable gate array 463FPM fast page mode 464FPR floating point register 465FPU floating point unit 466FQDN fully qualified domain name 467FRR false rejection rate 468FRU field replaceable unit 469FS file system 470FSB front side bus 471FSCK file system check 472FSF Free Software Foundation 473FSK frequency shift keying 474FSM finite-state machine 475FTA fault tree analysis 476FTL flash translation layer 477FTP File Transfer Protocol 478FTPS File Transfer Protocol Secure 479FUS fast user switching 480FWH firmware hub 481FWS folding white space 482GAL generic array logic 483GAS generic address structure 484GC garbage collector 485GCR group-coded recording 486GDT global descriptor table 487GEM graphics environment manager 488GEM graphics execution manager 489GENA general event notification architecture 490GHC Glasgow Haskell compiler 491GID group identifier 492GIF graphics interchange format 493GMCH graphics and memory controller hub 494GNU GNU's Not Unix 495GOP graphics output protocol 496GOT global offset table 497GPE general purpose event 498GPF general protection fault 499GPG GNU Privacy Guard 500GPL [GNU] General Public License 501GPR general purpose register 502GPS generalized processor sharing 503GPT GUID partition table 504GPU graphics processing unit 505GR golden ratio 506GRE generic routing encapsulation 507GSI global system interrupt 508GUI graphical user interface 509GUID globally unique identifier 510HA high availability 511HAL hardware abstraction layer 512HAT hashed array tree 513HBA host bus adapter 514HCF halt and catch fire 515HCI host controller interface 516HCI human-computer interaction 517HCL hardware compatibility list 518HDCP High-bandwidth Digital Content Protection 519HDD hard disk drive 520HDL hardware description language 521HDMI High-Definition Multimedia Interface 522HDTV high-definition television 523HF high frequency 524HFM highest frequency mode 525HID human interface device 526HLL high-level language 527HMA high memory area 528HMI human-machine interface 529HOOD hierarchical object oriented design 530HP Hewlett-Packard 531HPC high performance computing 532HPET high precision event timer 533HSM hardware security module 534HSM hierarchical storage management 535HT hyper-threading 536HTC hardware thermal control 537HTCC high temperature co-fired ceramic 538HTML HyperText Markup Language 539HTT hyper-threading technology 540HTTP Hypertext Transfer Protocol 541HTTPS Hypertext Transfer Protocol Secure 542HVM hardware virtual machine 543HZ Hertz 544I2O intelligent input/output 545IA information assurance 546IANA Internet Assigned Numbers Authority 547IBC iterated block cipher 548IBM International Business Machines 549IBS instruction based sampling 550IBSS independent basic service set 551IC integrated circuit 552ICA independent computer architecture 553ICB Internet Citizen's Band 554ICE in-circuit emulator 555ICE internal compiler error 556ICH I/O controller hub 557ICMP Internet Control Message Protocol 558ICT information and communications technology 559ICW initialization command word 560IDA Intel dynamic acceleration 561IDCMP Intuition direct communication message port 562IDE integrated development environment 563IDE integrated drive electronics 564IDPS intrusion detection [and] prevention system 565IDRP inter-domain routing protocol 566IDS intrusion detection system 567IDT interrupt descriptor table 568IE Internet Explorer 569IEC International Electrotechnical Commission 570IEEE Institute of Electrical and Electronics Engineers 571IESG Internet Engineering Steering Group 572IETF Internet Engineering Task Force 573IF intermediate frequency 574IFCM isochronous flow control mode 575IFF Interchange File Format 576IGD Internet gateway device 577IGMP Internet Group Management Protocol 578IGP interior gateway protocol 579IHV independent hardware vendor 580IKE Internet key exchange 581ILM internal loopback mode 582ILOM integrated lights-out management 583ILP instruction level parallelism 584IM instant messaging 585IMAP Internet Message Access Protocol 586IMC integrated memory controller 587IMCR interrupt mode configuration register 588IMR interrupt mask register 589IMS information management system 590INCITS InterNational Committee for Information Technology Standards 591IO input/output 592IOCTL input/output control 593IOMMU input/output memory management unit 594IOT Internet of Things 595IP Internet Protocol 596IP intellectual property 597IPC interprocess communication 598IPE integrated programming environment 599IPI interprocessor interrupt 600IPNG Internet Protocol, Next Generation 601IPS in-plane switching 602IPS intrusion prevention system 603IPSEC Internet Protocol Security 604IRC Internet Relay Chat 605IRDA infrared data association 606IRQ interrupt request 607IRQL interrupt request level 608IRR interrupt request register 609IRTF Internet Research Task Force 610IS information system 611ISA industry standard architecture 612ISA instruction set architecture 613ISDN integrated services digital network 614ISI inter-symbol interference 615ISM industrial, scientific, [and] medical 616ISN initial serial number 617ISO International Standards Organization 618ISOC Internet Society 619ISP Internet service provider 620ISR in-service register 621ISR interrupt service routine 622IST interrupt stack table 623ISV independent software vendor 624IT information technology 625ITB Intel Turbo Boost 626ITIL information technology infrastructure library 627ITSM IT service management 628IV initialization vector 629IVT interrupt vector table 630JBOD just a bunch of disks 631JFET junction [gate] field-effect transistor 632JIT just in time 633JPEG Joint Photographic Experts Group 634JRE Java Runtime Environment 635JTAG joint test action group 636KB keyboard 637KB kilobyte 638KBD keyboard 639KBD kilobaud 640KLOC thousand lines of code 641KMS kernel-mode setting 642KPI kernel programming interface 643KVA kernel virtual address 644KVM kernel virtual machine 645KVM kernel virtual memory 646KVM keyboard, video, [and] mouse 647LAMP Linux Apache MySQL {Perl,PHP,Python} 648LAN local area network 649LAPIC local advanced programmable interrupt controller 650LAR load access rights 651LBA logical block addressing 652LBS location-based service 653LCD liquid crystal display 654LCP link control protocol 655LDA local delivery agent 656LDAP Lightweight Directory Access Protocol 657LDR light-dependent resistor 658LDT local descriptor table 659LE logical extent 660LED light emitting diode 661LER label edge router 662LF line feed 663LF low frequency 664LFM lowest frequency mode 665LFN long file names 666LFO low-frequency oscillation 667LFS log-structured file system 668LFU least frequently used 669LHP loop heat pipe 670LIFO last in, first out 671LILO LInux LOader 672LILO last in, last out 673LINT local interrupt 674LIR local Internet registry 675LKM {Linux,loadable} kernel module 676LKML Linux kernel mailing list 677LL load linked 678LL/SC load linked/store conditional 679LLC logical link control 680LLDP link layer discovery protocol 681LLF low level format 682LLMNR link-local multicast name resolution 683LLVM Low Level Virtual Machine 684LM long mode 685LMM link management mode 686LNO loop nest optimization 687LOC lines of code 688LOM lights-out management 689LPC low pin count 690LPS local positioning system 691LRC longitudinal redundancy check 692LRM left-to-right mark 693LRO left-to-right override 694LRU least recently used 695LSB Linux standards base 696LSB least significant {bit,byte} 697LSI large scale integration 698LSL load segment limit 699LSN Large Scale NAT 700LSN log sequence number 701LSR label switch router 702LTCC low temperature co-fired ceramic 703LTO link time optimization 704LTR left to right 705LTR load task register 706LTR letter(-sized paper) 707LTS long term support 708LUA Lua Uppercase Accident 709LUN logical unit number 710LV logical volume 711LVM logical volume management 712LVT local vector table 713LWP light-weight process 714LZW Lempel Ziv Welch 715MAC mandatory access control 716MAC medium access control 717MAC message authentication {check,code} 718MADT multiple APIC descriptor table 719MB megabyte 720MBA multi-boot agent 721MBR master boot record 722MBS megabits per second 723MC memory controller 724MCA machine check architecture 725MCA MicroChannel architecture 726MCC multiversion concurrency control 727MCE machine check exception 728MCGA Multi-Color Graphics Array 729MCH memory controller hub 730MCM multi-chip module 731MCQ memory controlled queue 732MD machine-dependent 733MDA mail delivery agent 734MDA Monochrome Display Adapter 735MDRAM multibank dynamic random access memory 736MESI modified, exclusive, shared, invalid 737MFC merge from current 738MFC Microsoft Foundation Classes 739MFM modified frequency modulation 740MI machine-independent 741MIB management information base 742MIC message integrity {check,code} 743MID mobile Internet device 744MIDI musical instrument digital interface 745MIF management information format 746MIM man in the middle 747MIMD multiple instruction, multiple data 748MIME Multipurpose Internet Mail Extensions 749MIMO multiple input multiple output 750MIPS million instructions per second 751MISD multiple instruction, single data 752MIT Massachusetts Institute of Technology 753MITM man in the middle 754ML machine language 755ML machine learning 756ML mailing list 757ML markup language 758ML maximum likelihood 759MLC multi-level cell 760MLD multicast listener discovery 761MLHP micro loop heat pipe 762MMIC monolithic microwave integrated circuit 763MMIO memory mapped input/output 764MMORPG massive multiplayer online role playing game 765MMU memory management unit 766MMX matrix math extension 767MMX multimedia extension 768MMX multiple math extension 769MO magneto-optical 770MOESI modified, owned, exclusive, shared, invalid 771MOF maximum operating frequency 772MOSFET metal-oxide-semiconductor field-effect transistor 773MOSI modified, owned, shared, invalid 774MP multi-platform 775MP multiplayer 776MP {multiprocessing,multiprocessor} 777MPEG moving picture experts group 778MPI message passing interface 779MPLS Multiprotocol Label Switching 780MPP massively parallel processor 781MPS memory pool system 782MPS multiprocessor specification 783MR modem ready 784MRU most recently used 785MS Microsoft 786MSB most significant {bit,byte} 787MSE mean square error 788MSF minutes seconds frames 789MSI message signaled interrupt 790MSI modified, shared, invalid 791MSR machine state register 792MSS maximum segment size 793MSTP Multiple Spanning Tree Protocol 794MT machine translation 795MTA mail transfer agent 796MTBF mean time between failures 797MTP media transfer protocol 798MTRR memory type range register 799MTTF mean time to failure 800MTU maximum transmission unit 801MUA mail user agent 802MUD multi-user domain 803MVCC multiversion concurrency control 804MWE module width encoding 805MX mail exchange 806NACK negative acknowledgement 807NAN not a number 808NAPT Network Address Port Translation 809NAS network attached storage 810NAT network address translation 811NAV network allocation vector 812NC numerical control 813NCO numerically-controlled oscillator 814NCP Network Control Protocol 815NCQ native command queuing 816ND neighbor discovery 817NDFA nondeterministic finite automaton 818NE numeric error 819NFA nondeterministic finite automaton 820NFC near-field communication 821NFS network file system 822NIA next instruction address 823NIC network information center 824NIC network interface card 825NIDS network intrusion detection system 826NIP network interface protocol 827NIPS network intrusion prevention system 828NIS network information service 829NLS native language support 830NMI non-maskable interrupt 831NNTP Network News Transfer Protocol 832NOC network operations center 833NOP no operation 834NOS network operating system 835NP nondeterministic polynomial time 836NRZ non-return to zero 837NSA National Security Agency 838NTM non-deterministic Turing machine 839NTP Network Time Protocol 840NUMA non-uniform memory access 841NVRAM non-volatile random access memory 842NW not write-through 843NX no execute 844OAEP optimal asymmetric encryption padding 845OBO off by one 846OBOE off by one error 847OCL object constraint language 848OCR optical character recognition 849ODCM on-demand clock modulation 850ODT on-die termination 851OEM original equipment manufacturer 852OFDM orthogonal frequency division multiplexing 853OFET organic field-effect transistor 854OLAP online analytical processing 855OLE object linking and embedding 856OLTP online transaction processing 857ONFI open nand flash interface 858OO OpenOffice 859OO object oriented 860OOB out of band 861OOE out of order execution 862OOM out of memory 863OOO OpenOffice.org 864OOP object oriented programming 865OOPS object oriented programming systems 866OOSE object oriented software engineering 867OPM operations per minute 868OPS operations per second 869OQL Object Query Language 870ORB object request broker 871ORM object-relational mapping 872OS operating system 873OSD open source definition 874OSF open software foundation 875OSI Open Source Initiative 876OSI open systems interconnection 877OSPF open shortest path first 878OSPM OS power management 879OSS open sound system 880OSS open source software 881OSVW operating system visible workarounds 882OTP one time password 883OTP open telecom platform 884OU organizational unit 885OUI organizationally unique identifier 886OWL Web Ontology Language 887P2P PCI to PCI 888P2P peer to peer 889PA phase accumulator 890PA physical address 891PAC phase-amplitude converter 892PAE physical address extension 893PAL phase alternating line 894PAL programmable array logic 895PAM pluggable authentication modules 896PAM pulse amplitude modulation 897PAP password authentication protocol 898PAT page attribute table 899PAT port address translation 900PATA parallel ATA 901PAX portable archive exchange 902PBE pending break encoding 903PBE programming by example 904PC personal computer 905PC program counter 906PCB printed circuit board 907PCC Portable C Compiler 908PCD page-level cache disable 909PCE performance-monitor counter enable 910PCI peripheral component interconnect 911PCM phase change memory 912PCM pulse code modulation 913PCMCIA Personal Computer Memory Card International Association 914PCP Port Control Protocol 915PD public domain 916PDA personal digital assistant 917PDA pushdown automaton 918PDAG propositional directed acyclic graph 919PDB power distribution board 920PDF portable document format 921PDM pulse-duration modulation 922PDN pull-down network 923PDP page {descriptor,directory} page 924PDS product data sheet 925PDU protocol data unit 926PE protection enable 927PEAP Protected EAP 928PECI platform environment control interface 929PEP protocol extension protocol 930PER packed encoding rules 931PFS perfect forward secrecy 932PGAS partitioned global address space 933PGE page global enable 934PGP Pretty Good Privacy 935PHB PCI host bridge 936PHP PHP: Hypertext Preprocessor 937PIC position independent code 938PIC programmable interrupt controller 939PICNIC problem in chair, not in computer 940PID process id 941PIE position independent executable 942PIM personal information manager 943PIM platform-independent model 944PIO programmed input/output 945PIPT physically indexed, physically tagged 946PIQ prefetch input queue 947PIT programmable interrupt timer 948PIV personal identity verification 949PKCS public-key cryptography standards 950PKI public key infrastructure 951PLC programmable logic controller 952PLD programmable logic device 953PLL phase locked loop 954PLRU pseudo LRU 955PLTM package level thermal management 956PM power management 957PM {phase,pulse} modulation 958PME power management event 959PMI platform management interrupt 960PMIO port-mapped input/output 961PMT photo-multiplier tube 962PMU power management unit 963PNG portable network graphics 964PNP plug and play 965POE power over ethernet 966POF probability of failure 967POP Post Office Protocol 968POP power on password 969POSIX Portable Operating System Interface [for Unix] 970POST power on self test 971POTS plain old telephone system 972PP pair programming 973PPB PCI [to] PCI bridge 974PPC PowerPC 975PPI pixels per inch 976PPM pages per minute 977PPP Point-to-Point Protocol 978PPPOA Point-to-Point Protocol over ATM 979PPPOE Point-to-Point Protocol over Ethernet 980PPU physics processing unit 981PRBS pseudo-random bit sequence 982PRML partial response, maximum likelihood 983PRN pseudo random {noise,number} 984PRNG pseudo random number generator 985PROM programmable read only memory 986PSD power spectral density 987PSE page size extensions 988PSK phase shift keying 989PSK pre-shared key 990PSTN public switched telephone network 991PSW program status word 992PTE page table entry 993PTLA pseudo top level aggregator 994PTP page table page 995PTV perceived target value 996PU processing unit 997PUN physical unit number 998PV physical volume 999PVG physical volume group 1000PVI protected-mode virtual interrupt 1001PVST Per-VLAN Spanning Tree 1002PWM pulse width modulation 1003PXE preboot execution environment 1004QA quality assurance 1005QAM quadrature amplitude modulation 1006QAM quality assurance management 1007QBE query by example 1008QC quality control 1009QDI quasi delay insensitive 1010QOS quality of service 1011R/O read only 1012R/W read/write 1013RA receiver address 1014RA remote assistance 1015RA resource affinity 1016RA router advertisement 1017RAD rapid application development 1018RAID redundant array of {independent,inexpensive} disks 1019RAM random access memory 1020RAS reliability, availability and serviceability 1021RAS remote access service 1022RAS restartable atomic sequence 1023RAS row address strobe 1024RBF radial basis function 1025RBT red-black tree 1026RC release candidate 1027RC remote control 1028RCS Revision Control System 1029RCS revision control system 1030RCU read, copy, update 1031RDB Rigid Disk Block 1032RDBMS relational database management system 1033RDF Resource Description Framework 1034RDM relational data model 1035RDMA remote direct memory access 1036RE regular expression 1037REST representational state transfer 1038RF radio frequency 1039RFI radio frequency interference 1040RFO request for ownership 1041RGB red green blue 1042RGBA red green blue alpha 1043RH read hit 1044RHEL Red Hat Enterprise Linux 1045RHL Red Hat Linux 1046RIB routing information base 1047RIFF Resource Interchange File Format 1048RIP Routing Information Protocol 1049RIR regional Internet registry 1050RISC reduced instruction set {computer,computing} 1051RKM ROM Kernel Manual 1052RLE run length encoding 1053RLL run length limited 1054RLO right-to-left override 1055RM read miss 1056RMI remote method invocation 1057RMPM rapid memory power management 1058RMS root mean square 1059RMW read, modify, write 1060RNG random number generator 1061ROM read only memory 1062RPC remote procedure call 1063RPKI resource PKI 1064RPL requested privilege level 1065RPM revolutions per minute 1066RPN reverse Polish notation 1067RPVST Rapid Per-VLAN Spanning Tree 1068RR random replacement 1069RR round robin 1070RS relay station 1071RSA Rivest, Shamir, [and] Adleman 1072RSIP Realm Specific IP 1073RSN Robust Secure Network 1074RSS really simple syndication 1075RSS residual sum of squares 1076RSTP Rapid Spanning Tree Protocol 1077RT real time 1078RTC real time clock 1079RTC real time computing 1080RTF rich text format 1081RTL register transfer language 1082RTL resistor-transistor logic 1083RTL right to left 1084RTOS real time operating system 1085RTS request to send 1086RTT round trip time 1087RUP rational unified process 1088RWM read-write memory 1089RX {receive,receiver} 1090S/PDIF Sony/Philips Digital Interface Format 1091SA security advisory 1092SA security association 1093SA source address 1094SA structured analysis 1095SAAS software as a service 1096SACD super audio compact disc 1097SAD security association database 1098SAL system abstraction layer 1099SAM serial access memory 1100SAM sum addressed memory 1101SAN storage area network 1102SAP service access point 1103SAPIC streamlined advanced programmable interrupt controller 1104SASD structured analysis, structured design 1105SASI Shugart Associates System Interface 1106SASL simple authentication [and] security layer 1107SATA serial advanced technology attachment 1108SB sound blaster 1109SBU standard build unit 1110SC store conditional 1111SCA source code analyzer 1112SCADA supervisory control and data acquisition 1113SCC single chip cloud 1114SCC source code control 1115SCCS Source Code Control System 1116SCI scalable coherent interface 1117SCI system control interrupt 1118SCM software configuration management 1119SCM source code management 1120SCM storage-class memory 1121SCP secure copy 1122SCSI Small Computer System Interface 1123SCTP Stream Control Transmission Protocol 1124SDI symbol deinterleave 1125SDK software development kit 1126SDL Simple Declarative Language 1127SDL Simple Direct-media Layer 1128SDRAM synchronous dynamic random access memory 1129SDT syntax-directed translation 1130SEGV segmentation violation 1131SEO search engine optimization 1132SFC sequential function chart 1133SFI simple firmware interface 1134SFI software fault isolation 1135SFTP SSH File Transfer Protocol 1136SFTP Serial File Transfer Protocol 1137SFTP Simple File Transfer Protocol 1138SGRAM synchronous graphics random access memory 1139SIEM security information and event management 1140SIFS short inter-frame space 1141SIMD single instruction, multiple data 1142SIMM single inline memory module 1143SIP Session Initiation Protocol 1144SIR signal-to-interference ratio 1145SIR slow infrared 1146SISD single instruction, single data 1147SLC single-level cell 1148SLDRAM synchronous-link dynamic random access memory 1149SLED single large expensive disk 1150SLI scalable link interface 1151SLI scan-line interleave 1152SLOC source lines of code 1153SLRU segmented LRU 1154SMA smart memory access 1155SMAF system management action field 1156SMAP Simple Mail Access Protocol 1157SMAP supervisor mode access prevention 1158SMART self-monitoring analysis and reporting technology 1159SMBIOS System Management BIOS 1160SMC system management controller 1161SMI structure of management information 1162SMI system management interrupt 1163SMM system management mode 1164SMP symmetric multiprocessing 1165SMT simultaneous multithreading 1166SMTP Simple Mail Transfer Protocol 1167SMU system management unit 1168SNAP Sub-Network Access Protocol 1169SNMP Simple Network Management Protocol 1170SNR signal-to-noise ratio 1171SOA service oriented architecture 1172SOAP Simple Object Access Protocol 1173SOC system on chip 1174SOF start of frame 1175SOH start of header 1176SOHO small office/home office 1177SOL serial over LAN 1178SP service pack 1179SP stack pointer 1180SPARC scalable processor architecture 1181SPARQL SPARQL Protocol and RDF Query Language 1182SPD security policy database 1183SPD serial presence detect 1184SPDIF Sony/Philips digital interface format 1185SPI serial peripheral interface 1186SPI stateful packet inspection 1187SPMD single process, multiple data 1188SPR special purpose register 1189SPT sectors per track 1190SQA software quality assurance 1191SQL Structured Query Language 1192SRAM static random access memory 1193SRC sample rate conversion 1194SS self-snoop 1195SS stack segment 1196SSAP source service access point 1197SSB single-sideband modulation 1198SSD solid state drive 1199SSE streaming SIMD extensions 1200SSFDC solid state floppy disc card 1201SSH secure shell 1202SSI server side includes 1203SSID service set identifier 1204SSL secure sockets layer 1205SSP stack smashing protection 1206STC software thermal control 1207STD state transition diagram 1208STP Spanning Tree Protocol 1209STP shielded twisted pair 1210SUS Single Unix Specification 1211SUT system under test 1212SVG scalable vector graphics 1213SVGA Super Video Graphics Array 1214SVM secure virtual machine 1215SVM support vector machine 1216SVR System V Release 1217SWF Shockwave Flash 1218SWIG simplified wrapper [and] interface generator 1219SYR symbol timing recovery 1220TA test assertion 1221TA transmitter address 1222TAI international atomic time 1223TAO track at once 1224TAOCP The Art of Computer Programming 1225TAP Test Anything Protocol 1226TAS test and set 1227TB terabyte 1228TCB trace capture buffer 1229TCB trusted computing base 1230TCC thermal control circuit 1231TCL tool command language 1232TCP Transmission Control Protocol 1233TCQ tagged command queueing 1234TDC time [to] digital converter 1235TDD test driven development 1236TDD time division duplex 1237TDM time division multiplexing 1238TDMA time division multiple access 1239TDOA time difference of arrival 1240TDP thermal design {point,power} 1241TECO Text Editor and Corrector 1242TFT thin film transistor 1243TFTP Trivial File Transfer Protocol 1244TIAS try it and see 1245TIFF tagged image file format 1246TITS try it to see 1247TK temporal key 1248TKIP Temporal Key Integrity Protocol 1249TLA top level aggregator 1250TLB translation lookaside buffer 1251TLD top level domain 1252TLS thread local storage 1253TLS transport layer security 1254TM Turing machine 1255TM thermal monitor 1256TMDS transition minimized differential signaling 1257TMO timeout 1258TOD time of day 1259TOS terms of service 1260TOS trusted operating system 1261TOS type of service 1262TP transaction processing 1263TPI tracks per inch 1264TPM transactions per minute 1265TPM trusted platform module 1266TPR task priority register 1267TPS transactions per second 1268TPS transmission parameters signaling 1269TR task register 1270TR token ring 1271TRL timing recovery loop 1272TRNG true random number generator 1273TS terminal services 1274TS time series 1275TS time stamp 1276TS transport stream 1277TSC time stamp counter 1278TSD time stamp disable 1279TSL test, set, lock 1280TSO time sharing option 1281TSP Time-Stamp Protocol 1282TSP Tunnel Setup Protocol 1283TSP time synchronization protocol 1284TSP traveling salesman problem 1285TSS task state segment 1286TTL time to live 1287TTL transistor-transistor logic 1288TTM translation table maps 1289TTY teletype 1290TUI {terminal,text-based,textual} user interface 1291TX {transmit out,transmitter} 1292TZ time zone 1293UAC user {access,account} control 1294UAF use-after-free 1295UART universal asynchronous receiver/transmitter 1296UAT user acceptance testing 1297UC uncacheable 1298UCS uniform-cost search 1299UDMA ultra DMA 1300UDO ultra density optical 1301UDP User Datagram Protocol 1302UEFI unified extensible firmware interface 1303UFS Unix File System 1304UGA universal graphics adapter 1305UI unit interval 1306UI user interface 1307UID unique identifier 1308UID user identifier 1309UL upload 1310UMA uniform memory access 1311UMA upper memory area 1312UMB upper memory block 1313UML unified modeling language 1314UMPC ultra-mobile PC 1315UPNP universal plug and play 1316UPS uninterruptible power supply 1317URI uniform resource identifier 1318URL uniform resource locator 1319URN uniform resource name 1320USART universal synchronous/asynchronous receiver/transmitter 1321USB universal serial bus 1322USWC uncacheable speculative write combining 1323UT unit test 1324UTC coordinated universal time 1325UTP unshielded twisted pair 1326UUCP Unix-to-Unix Copy Protocol 1327UUID universally unique identifier 1328UUOC useless use of cat 1329UUT unit under test 1330UX user experience 1331VA vertical alignment 1332VA virtual address 1333VA volt-ampere 1334VAX virtual address extension 1335VB Visual Basic 1336VCA variable-gain amplifier 1337VCC common collector voltage 1338VCF voltage-controlled filter 1339VCM virtual channel memory 1340VCO voltage-controlled oscillator 1341VCS version control system 1342VESA Video Electronics Standards Association 1343VFO variable-frequency oscillator 1344VG volume group 1345VGA Video Graphics Array 1346VHDCI very high density cable interconnect 1347VID voltage level identifier 1348VIPT virtually indexed, physically tagged 1349VIVT virtually indexed, virtually tagged 1350VLAN virtual local area network 1351VLIW very long instruction word 1352VLSI very large scale integration 1353VLSM variable length subnet mask 1354VM virtual {machine,memory} 1355VME virtual mode extension 1356VMX vector multimedia extensions 1357VMX virtual machine extensions 1358VOD video on demand 1359VPN virtual private network 1360VR virtual reality 1361VRAM video random access memory 1362VRM voltage regulator module 1363VRRP Virtual Router Redundancy Protocol 1364VSTP VLAN Spanning Tree Protocol 1365VTP VLAN Trunking Protocol 1366W watt 1367W3C World Wide Web Consortium 1368WAN wide area network 1369WAP Wireless Application Protocol 1370WAP wireless access point 1371WDT watchdog timer 1372WEP Wired Equivalent Privacy 1373WFI wait for interrupt 1374WFQ weighted fair queuing 1375WH write hit 1376WIFI wireless fidelity 1377WLAN wireless local area network 1378WM write miss 1379WMI Windows Management Instrumentation 1380WOL Wake-on-LAN 1381WOM Wake-on-Modem 1382WOR Wake-on-Ring 1383WORM write once read many 1384WP WordPerfect 1385WP word processor 1386WP write protect 1387WPA Wi-Fi Protected Access 1388WPA2 Wi-Fi Protected Access II 1389WPS Wi-Fi Protected Setup 1390WRAM window random access memory 1391WS web services 1392WTC write through caching 1393WWAN wireless wide area network 1394WWW world wide web 1395WYSIWYG what you see is what you get 1396XBAR crossbar 1397XDMCP X Display Manager control protocol 1398XER XML encoding rules 1399XGA Extended Graphics Array 1400XIP execute in place 1401XML Extensible Markup Language 1402XOR exclusive or 1403XP extreme programming 1404XSI X/Open System Interface 1405XSL extensible stylesheet language 1406XSS cross site scripting 1407XT extended technology 1408XUL XML user interface language 1409YACC yet another compiler compiler 1410YAWPFAPR you are welcome; please file a problem report 1411YP Yellow Pages 1412YTD year to date 1413ZBR zone bit recording 1414ZFOD zero-filled on demand 1415ZIF zero insertion force 1416ZIFS zero insertion force socket 1417ZMA zone multicast address 1418