1$NetBSD: acronyms.comp,v 1.166 2016/05/31 23:15:05 jnemeth 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 134BPF Berkeley Packet Filter 135BPI bits per inch 136BPM business process modelling 137BPS bits per second 138BPSK binary phase shift keying 139BQS Berkeley quality software 140BRE basic regular expression 141BS backspace 142BS binary sequence 143BSA basic service area 144BSD Berkeley Software Distribution 145BSF bit scan forward 146BSOD blue screen of death 147BSP binary space partition 148BSP bootstrap processor 149BSR bit scan reverse 150BSS basic service set 151BSS block started by symbol 152BSSID basic service set identifier 153BT BitTorrent 154BT Bluetooth 155BT bit test 156BTC bit test [and] complement 157BTR bit test [and] reset 158BTS bit test [and] set 159BTS bits per second 160BW bandwidth 161BWM block-write mode 162CA certificate authority 163CAD computer-aided design 164CAM computer assisted manufacturing 165CAM conditional access module 166CAM content addressable memory 167CARP Common Address Redundancy Protocol 168CAS column address strobe 169CAS compare and swap 170CAS computer algebra system 171CASE computer aided software engineering 172CAU control access unit 173CAV constant angular velocity 174CBC cipher block chaining 175CBR constant bit rate 176CC carbon coby 177CCD charge coupled device 178CCI co-channel interferer 179CD cache disable 180CD compact disc 181CDDA compact disc digital audio 182CDMA code division multiple access 183CDRAM cache dynamic random access memory 184CER canonical encoding rules 185CF compact flash 186CFG context-free grammar 187CFG control-flow graph 188CG control gate 189CGA Color Graphics Adapter 190CGI common gateway interface 191CGN Carrier-Grade NAT 192CHAP Challenge-Handshake Authentication Protocol 193CHS cylinder/head/sector 194CI continuous integration 195CI {common,component} interface 196CIDR Classless Inter-Domain Routing 197CIFS Common Internet File System 198CIL common intermediate language 199CIR carrier-to-interference ratio 200CIS contact image sensor 201CISC complex instruction set {computer,computing} 202CJK Chinese, Japanese, [and] Korean 203CLF common log format 204CLI command line interface 205CLR common language runtime 206CLTT closed loop thermal throttling 207CLUT color look-up table 208CLV constant linear velocity 209CM configuration management 210CMA concert multithread architecture 211CMI control management interface 212CMI control method interface 213CMOS complementary metal-oxide-semiconductor 214CMP chip multi-processing 215CMS content management system 216CMYK cyan magenta yellow black 217CN {common,canonical} name 218CNC computer numerical control 219CNR carrier-to-noise ratio 220COF current operating frequency 221COFDM coded orthogonal frequency division multiplexing 222COFF common object file format 223COM component object model 224COMA cache-only memory architecture 225CORBA common object request broker architecture 226COW copy-on-write 227CP continuous pilot 228CPB core performance boost 229CPE common phase error 230CPG clock pulse generator 231CPL current privilege level 232CPLD complex programmable logic device 233CPP C preprocessor 234CPS characters per second 235CPT command pass through 236CPU central processing unit 237CR carriage return 238CRC cyclic redundancy check 239CRL carrier recovery loop 240CRLF carriage return line feed 241CRT cathode ray tube 242CS cable select 243CS chip select 244CS code segment 245CS computer science 246CSI channel state information 247CSI common system interface 248CSMA carrier sense multiple access 249CSMA/CA carrier sense multiple access with collision avoidance 250CSMA/CD carrier sense multiple access with collision detection 251CSR control [and] status registers 252CSRG Computer Systems Research Group 253CSS cascading style sheets 254CSV comma-separated values 255CTM close to metal 256CTS clear to send 257CUA common user access 258CUT coordinated universal time 259CV control voltage 260CVS Concurrent Versions System 261DA destination address 262DAA distributed application architecture 263DAB digital audio broadcasting 264DAC digital [to] analog converter 265DAC discretionary access control 266DAD duplicate address detection 267DANE DNS-based Authentication of Named Entities 268DAO disk at once 269DAP Directory Access Protocol 270DAT digital audio tape 271DAT dynamic acceleration technology 272DB database 273DBA database administrator 274DBA dynamic bandwidth allocation 275DBB data bus buffer 276DBC design by contract 277DBL dynamic buffer limiting 278DBMS database management system 279DBS database server 280DC direct current 281DCC Direct Client-to-Client 282DCC direct cable connect 283DCD data carrier detect 284DCE data control equipment 285DCE distributed computing environment 286DCOM distributed component object model 287DCOP Desktop COmmunication Protocol 288DCS data collection systems 289DCT discrete cosine transform 290DCU data cache unit 291DDC display data channel 292DDE dynamic data exchange 293DDK device driver kit 294DDL data description language 295DDR double data rate 296DDS direct digital sound 297DDWG Digital Display Working Group 298DE debugging extensions 299DE desktop environment 300DEA data encryption algorithm 301DEK data encryption key 302DEP data execution prevention 303DER distinguished encoding rules 304DES Data Encryption Standard 305DF don't fragment 306DFA deterministic finite automaton 307DFC data flow control 308DFS depth first search 309DFS distributed file system 310DFT diagnostic function test 311DFT discrete Fourier transform 312DGL data generation language 313DH Diffie-Hellman 314DHCP Dynamic Host Configuration Protocol 315DIFS distributed inter-frame space 316DIMM dual inline memory module 317DIRT design in real time 318DL diode logic 319DL discrete logarithm 320DL download 321DLE data link escape 322DLL dynamic link library 323DLP discrete logarithm problem 324DMA direct memory access 325DMI desktop management interface 326DMS document management system 327DMT discrete multitone modulation 328DNARD Digital network appliance reference design 329DND drag and drop 330DNS Domain Name System 331DNSSEC DNS Security Extensions 332DOE distributed object environment 333DOF data over fibre 334DOM document object model 335DOS denial of service 336DOS disk operating system 337DP DisplayPort 338DPC deferred procedure call 339DPCM differential pulse code modulation 340DPD dead peer detection 341DPI deep packet inspection 342DPI dots per inch 343DPL descriptor privilege level 344DPS Display PostScript 345DPST display power savings technology 346DRAM dynamic random access memory 347DRI direct rendering infrastructure 348DRM digital rights management 349DRRS display refresh rate switching 350DS debug store 351DSA digital signature algorithm 352DSB double-sideband modulation 353DSDT differentiated system descriptor table 354DSL digital subscriber line 355DSL domain specific language 356DSLAM digital subscriber line access multiplexer 357DSN delivery status notification 358DSO dynamic shared object 359DSP digital signal processor 360DSSS direct sequence spread spectrum 361DTD document type definition 362DTE data terminal equipment 363DTE dumb terminal emulator 364DTL diode-transistor logic 365DTLS datagram transport layer security 366DTS digital thermal sensor 367DUT device under test 368DVB digital video broadcasting 369DVCS distributed version control system 370DVD digital versatile disc 371DVFS dynamic voltage and frequency scaling 372DVI device independent 373DVI Digital Visual Interface 374DVR digital video recorder 375E-XER extended XML encoding rules 376EABI embedded-application binary interface 377EAI Email Address Internationalization 378EAI Enterprise Application Integration 379EAP Extensible Authentication Protocol 380EAPOL EAP over Lan 381EBCDIC Extended Binary Coded Decimal Interchange Code 382EBR extended boot record 383EC elliptical curve 384ECC error correction code 385ECDL elliptical curve discrete logarithm 386ECDSA elliptical curve digital signature algorithm 387ECL emitter-coupled logic 388ECN explicit congestion notification 389ECP enhanced capability port 390ECS enhanced chip set 391ECS extended configuration space 392EDAT enhanced dynamic acceleration technology 393EDGE explicit data graph execution 394EDID extended display identification data 395EDO extended data out 396EDS electronical data sheet 397EEPROM electrically erasable programmable read only memory 398EFI extensible firmware interface 399EFL emitter follower logic 400EFM eight to fourteen modulation 401EGA Enhanced Graphics Adapter 402EGP exterior gateway protocol 403EH extension header 404EIDE enhanced IDE 405EISA extended industry standard architecture 406ELF executable and linking format 407ELS entry level system 408EMI electro-magnetic interference 409EMP electro-magnetic pulse 410EMR electro-magnetic radiation 411EOF end of file 412EOI end of interrupt 413EOL end of line 414EOT end of transmission 415EPIC explicitly parallel instruction computing 416EPP enhanced parallel port 417EPRML extended partial response, maximum likelihood 418EPROM erasable programmable read only memory 419ERD emergency recovery disk 420ERD entity relationship diagram 421ERE extended regular expression 422ESDRAM enhanced synchronous dynamic random access memory 423ESS electronic switching system 424ESS extended service set 425ESSID extended service set identifier 426EST enhanced speedstep 427ETL extract, transform, load 428EU execution unit 429EULA end user license agreement 430FAT file allocation table 431FBRAM frame buffer random access memory 432FCL fiber channel loop 433FCS frame check sequence 434FDC floppy disk controller 435FDD floppy disk drive 436FDDI fiber distributed data interface 437FDE full disk encryption 438FEA finite element analysis 439FEC forward error correction 440FET field-effect transistor 441FF form feed 442FFH functional fixed hardware 443FFI foreign function interface 444FFM focus follows mouse 445FFS Fast File System 446FFS find first set 447FFT fast Fourier transform 448FG floating gate 449FHSS frequency hop spread spectrum 450FID frequency identifier 451FIFO first in, first out 452FILO first in, last out 453FIR fast infrared 454FLOPS floating [point] operations per second 455FLOSS free/libre/open source software 456FM frequency modulation 457FMR false match rate 458FOSS free/open source software 459FPGA field programmable gate array 460FPM fast page mode 461FPR floating point register 462FPU floating point unit 463FQDN fully qualified domain name 464FRR false rejection rate 465FRU field replaceable unit 466FS file system 467FSB front side bus 468FSCK file system check 469FSF Free Software Foundation 470FSK frequency shift keying 471FSM finite-state machine 472FTA fault tree analysis 473FTL flash translation layer 474FTP File Transfer Protocol 475FTPS File Transfer Protocol Secure 476FUS fast user switching 477FWH firmware hub 478FWS folding white space 479GAL generic array logic 480GAS generic address structure 481GC garbage collector 482GCR group-coded recording 483GDT global descriptor table 484GEM graphics environment manager 485GEM graphics execution manager 486GENA general event notification architecture 487GHC Glasgow Haskell compiler 488GID group identifier 489GIF graphics interchange format 490GMCH graphics and memory controller hub 491GNU GNU's Not Unix 492GOP graphics output protocol 493GOT global offset table 494GPE general purpose event 495GPF general protection fault 496GPG GNU Privacy Guard 497GPL [GNU] General Public License 498GPR general purpose register 499GPS generalized processor sharing 500GPT GUID partition table 501GPU graphics processing unit 502GR golden ratio 503GRE generic routing encapsulation 504GSI global system interrupt 505GUI graphical user interface 506GUID globally unique identifier 507HA high availability 508HAL hardware abstraction layer 509HAT hashed array tree 510HBA host bus adapter 511HCF halt and catch fire 512HCI host controller interface 513HCI human-computer interaction 514HCL hardware compatibility list 515HDCP High-bandwidth Digital Content Protection 516HDD hard disk drive 517HDL hardware description language 518HDMI High-Definition Multimedia Interface 519HDTV high-definition television 520HF high frequency 521HFM highest frequency mode 522HID human interface device 523HLL high-level language 524HMA high memory area 525HMI human-machine interface 526HOOD hierarchical object oriented design 527HP Hewlett-Packard 528HPC high performance computing 529HPET high precision event timer 530HSM hardware security module 531HSM hierarchical storage management 532HT hyper-threading 533HTC hardware thermal control 534HTCC high temperature co-fired ceramic 535HTML HyperText Markup Language 536HTT hyper-threading technology 537HTTP Hypertext Transfer Protocol 538HTTPS Hypertext Transfer Protocol Secure 539HVM hardware virtual machine 540HZ Hertz 541I2O intelligent input/output 542IA information assurance 543IANA Internet Assigned Numbers Authority 544IBC iterated block cipher 545IBM International Business Machines 546IBS instruction based sampling 547IBSS independent basic service set 548IC integrated circuit 549ICA independent computer architecture 550ICB Internet Citizen's Band 551ICE in-circuit emulator 552ICE internal compiler error 553ICH I/O controller hub 554ICMP Internet Control Message Protocol 555ICT information and communications technology 556ICW initialization command word 557IDA Intel dynamic acceleration 558IDCMP Intuition direct communication message port 559IDE integrated development environment 560IDE integrated drive electronics 561IDPS intrusion detection [and] prevention system 562IDRP inter-domain routing protocol 563IDS intrusion detection system 564IDT interrupt descriptor table 565IE Internet Explorer 566IEC International Electrotechnical Commission 567IEEE Institute of Electrical and Electronics Engineers 568IESG Internet Engineering Steering Group 569IETF Internet Engineering Task Force 570IF intermediate frequency 571IFCM isochronous flow control mode 572IFF Interchange File Format 573IGD Internet gateway device 574IGMP Internet Group Management Protocol 575IGP interior gateway protocol 576IHV independent hardware vendor 577IKE Internet key exchange 578ILM internal loopback mode 579ILOM integrated lights-out management 580ILP instruction level parallelism 581IM instant messaging 582IMAP Internet Message Access Protocol 583IMC integrated memory controller 584IMCR interrupt mode configuration register 585IMR interrupt mask register 586IMS information management system 587INCITS InterNational Committee for Information Technology Standards 588IO input/output 589IOCTL input/output control 590IOMMU input/output memory management unit 591IOT Internet of Things 592IP Internet Protocol 593IP intellectual property 594IPC interprocess communication 595IPE integrated programming environment 596IPI interprocessor interrupt 597IPNG Internet Protocol, Next Generation 598IPS in-plane switching 599IPS intrusion prevention system 600IPSEC Internet Protocol Security 601IRC Internet Relay Chat 602IRDA infrared data association 603IRQ interrupt request 604IRQL interrupt request level 605IRR interrupt request register 606IRTF Internet Research Task Force 607IS information system 608ISA industry standard architecture 609ISA instruction set architecture 610ISDN integrated services digital network 611ISI inter-symbol interference 612ISM industrial, scientific, [and] medical 613ISN initial serial number 614ISO International Standards Organization 615ISOC Internet Society 616ISP Internet service provider 617ISR in-service register 618ISR interrupt service routine 619IST interrupt stack table 620ISV independent software vendor 621IT information technology 622ITB Intel Turbo Boost 623ITIL information technology infrastructure library 624ITSM IT service management 625IV initialization vector 626IVT interrupt vector table 627JBOD just a bunch of disks 628JFET junction [gate] field-effect transistor 629JIT just in time 630JPEG Joint Photographic Experts Group 631JRE Java Runtime Environment 632JTAG joint test action group 633KB keyboard 634KB kilobyte 635KBD keyboard 636KBD kilobaud 637KLOC thousand lines of code 638KMS kernel-mode setting 639KPI kernel programming interface 640KVA kernel virtual address 641KVM kernel virtual machine 642KVM kernel virtual memory 643KVM keyboard, video, [and] mouse 644LAMP Linux Apache MySQL {Perl,PHP,Python} 645LAN local area network 646LAPIC local advanced programmable interrupt controller 647LAR load access rights 648LBA logical block addressing 649LBS location-based service 650LCD liquid crystal display 651LCP link control protocol 652LDA local delivery agent 653LDAP Lightweight Directory Access Protocol 654LDR light-dependent resistor 655LDT local descriptor table 656LE logical extent 657LED light emitting diode 658LER label edge router 659LF line feed 660LF low frequency 661LFM lowest frequency mode 662LFN long file names 663LFO low-frequency oscillation 664LFS log-structured file system 665LFU least frequently used 666LHP loop heat pipe 667LIFO last in, first out 668LILO LInux LOader 669LILO last in, last out 670LINT local interrupt 671LIR local Internet registry 672LKM {Linux,loadable} kernel module 673LKML Linux kernel mailing list 674LL load linked 675LL/SC load linked/store conditional 676LLC logical link control 677LLDP link layer discovery protocol 678LLF low level format 679LLMNR link-local multicast name resolution 680LLVM Low Level Virtual Machine 681LM long mode 682LMM link management mode 683LNO loop nest optimization 684LOC lines of code 685LOM lights-out management 686LPC low pin count 687LPS local positioning system 688LRC longitudinal redundancy check 689LRM left-to-right mark 690LRO left-to-right override 691LRU least recently used 692LSB Linux standards base 693LSB least significant {bit,byte} 694LSI large scale integration 695LSL load segment limit 696LSN Large Scale NAT 697LSN log sequence number 698LSR label switch router 699LTCC low temperature co-fired ceramic 700LTO link time optimization 701LTR left to right 702LTR load task register 703LTR letter(-sized paper) 704LTS long term support 705LUA Lua Uppercase Accident 706LUN logical unit number 707LV logical volume 708LVM logical volume management 709LVT local vector table 710LWP light-weight process 711LZW Lempel Ziv Welch 712MAC mandatory access control 713MAC medium access control 714MAC message authentication {check,code} 715MADT multiple APIC descriptor table 716MB megabyte 717MBA multi-boot agent 718MBR master boot record 719MBS megabits per second 720MC memory controller 721MCA machine check architecture 722MCA MicroChannel architecture 723MCC multiversion concurrency control 724MCE machine check exception 725MCGA Multi-Color Graphics Array 726MCH memory controller hub 727MCM multi-chip module 728MCQ memory controlled queue 729MD machine-dependent 730MDA mail delivery agent 731MDA Monochrome Display Adapter 732MDRAM multibank dynamic random access memory 733MESI modified, exclusive, shared, invalid 734MFC merge from current 735MFC Microsoft Foundation Classes 736MFM modified frequency modulation 737MI machine-independent 738MIB management information base 739MIC message integrity {check,code} 740MID mobile Internet device 741MIDI musical instrument digital interface 742MIF management information format 743MIM man in the middle 744MIMD multiple instruction, multiple data 745MIME Multipurpose Internet Mail Extensions 746MIMO multiple input multiple output 747MIPS million instructions per second 748MISD multiple instruction, single data 749MIT Massachusetts Institute of Technology 750MITM man in the middle 751ML machine language 752ML machine learning 753ML mailing list 754ML markup language 755ML maximum likelihood 756MLC multi-level cell 757MLD multicast listener discovery 758MLHP micro loop heat pipe 759MMIC monolithic microwave integrated circuit 760MMIO memory mapped input/output 761MMORPG massive multiplayer online role playing game 762MMU memory management unit 763MMX matrix math extension 764MMX multimedia extension 765MMX multiple math extension 766MO magneto-optical 767MOESI modified, owned, exclusive, shared, invalid 768MOF maximum operating frequency 769MOSFET metal-oxide-semiconductor field-effect transistor 770MOSI modified, owned, shared, invalid 771MP multi-platform 772MP multiplayer 773MP {multiprocessing,multiprocessor} 774MPEG moving picture experts group 775MPI message passing interface 776MPLS Multiprotocol Label Switching 777MPP massively parallel processor 778MPS memory pool system 779MPS multiprocessor specification 780MR modem ready 781MRU most recently used 782MS Microsoft 783MSB most significant {bit,byte} 784MSE mean square error 785MSF minutes seconds frames 786MSI message signaled interrupt 787MSI modified, shared, invalid 788MSR machine state register 789MSS maximum segment size 790MT machine translation 791MTA mail transfer agent 792MTBF mean time between failures 793MTP media transfer protocol 794MTRR memory type range register 795MTTF mean time to failure 796MTU maximum transmission unit 797MUA mail user agent 798MUD multi-user domain 799MVCC multiversion concurrency control 800MWE module width encoding 801MX mail exchange 802NACK negative acknowledgement 803NAN not a number 804NAPT Network Address Port Translation 805NAS network attached storage 806NAT network address translation 807NAV network allocation vector 808NC numerical control 809NCO numerically-controlled oscillator 810NCP Network Control Protocol 811NCQ native command queuing 812ND neighbor discovery 813NDFA nondeterministic finite automaton 814NE numeric error 815NFA nondeterministic finite automaton 816NFC near-field communication 817NFS network file system 818NIA next instruction address 819NIC network information center 820NIC network interface card 821NIDS network intrusion detection system 822NIP network interface protocol 823NIPS network intrusion prevention system 824NIS network information service 825NLS native language support 826NMI non-maskable interrupt 827NNTP Network News Transfer Protocol 828NOC network operations center 829NOP no operation 830NOS network operating system 831NP nondeterministic polynomial time 832NRZ non-return to zero 833NSA National Security Agency 834NTM non-deterministic Turing machine 835NTP Network Time Protocol 836NUMA non-uniform memory access 837NVRAM non-volatile random access memory 838NW not write-through 839NX no execute 840OAEP optimal asymmetric encryption padding 841OBO off by one 842OBOE off by one error 843OCL object constraint language 844OCR optical character recognition 845ODCM on-demand clock modulation 846ODT on-die termination 847OEM original equipment manufacturer 848OFDM orthogonal frequency division multiplexing 849OFET organic field-effect transistor 850OLAP online analytical processing 851OLE object linking and embedding 852OLTP online transaction processing 853ONFI open nand flash interface 854OO OpenOffice 855OO object oriented 856OOB out of band 857OOE out of order execution 858OOM out of memory 859OOO OpenOffice.org 860OOP object oriented programming 861OOPS object oriented programming systems 862OOSE object oriented software engineering 863OPM operations per minute 864OPS operations per second 865OQL Object Query Language 866ORB object request broker 867ORM object-relational mapping 868OS operating system 869OSD open source definition 870OSF open software foundation 871OSI Open Source Initiative 872OSI open systems interconnection 873OSPF open shortest path first 874OSPM OS power management 875OSS open sound system 876OSS open source software 877OSVW operating system visible workarounds 878OTP one time password 879OTP open telecom platform 880OU organizational unit 881OUI organizationally unique identifier 882OWL Web Ontology Language 883P2P PCI to PCI 884P2P peer to peer 885PA phase accumulator 886PA physical address 887PAC phase-amplitude converter 888PAE physical address extension 889PAL phase alternating line 890PAL programmable array logic 891PAM pluggable authentication modules 892PAM pulse amplitude modulation 893PAP password authentication protocol 894PAT page attribute table 895PAT port address translation 896PATA parallel ATA 897PAX portable archive exchange 898PBE pending break encoding 899PBE programming by example 900PC personal computer 901PC program counter 902PCB printed circuit board 903PCC Portable C Compiler 904PCD page-level cache disable 905PCE performance-monitor counter enable 906PCI peripheral component interconnect 907PCM phase change memory 908PCM pulse code modulation 909PCMCIA Personal Computer Memory Card International Association 910PCP Port Control Protocol 911PD public domain 912PDA personal digital assistant 913PDA pushdown automaton 914PDAG propositional directed acyclic graph 915PDB power distribution board 916PDF portable document format 917PDM pulse-duration modulation 918PDN pull-down network 919PDP page {descriptor,directory} page 920PDS product data sheet 921PDU protocol data unit 922PE protection enable 923PEAP Protected EAP 924PECI platform environment control interface 925PEP protocol extension protocol 926PER packed encoding rules 927PFS perfect forward secrecy 928PGAS partitioned global address space 929PGE page global enable 930PGP Pretty Good Privacy 931PHB PCI host bridge 932PHP PHP: Hypertext Preprocessor 933PIC position independent code 934PIC programmable interrupt controller 935PICNIC problem in chair, not in computer 936PID process id 937PIE position independent executable 938PIM personal information manager 939PIM platform-independent model 940PIO programmed input/output 941PIPT physically indexed, physically tagged 942PIQ prefetch input queue 943PIT programmable interrupt timer 944PIV personal identity verification 945PKCS public-key cryptography standards 946PKI public key infrastructure 947PLC programmable logic controller 948PLD programmable logic device 949PLL phase locked loop 950PLRU pseudo LRU 951PLTM package level thermal management 952PM power management 953PM {phase,pulse} modulation 954PME power management event 955PMI platform management interrupt 956PMIO port-mapped input/output 957PMT photo-multiplier tube 958PMU power management unit 959PNG portable network graphics 960PNP plug and play 961POE power over ethernet 962POF probability of failure 963POP Post Office Protocol 964POP power on password 965POSIX Portable Operating System Interface [for Unix] 966POST power on self test 967POTS plain old telephone system 968PP pair programming 969PPB PCI [to] PCI bridge 970PPC PowerPC 971PPI pixels per inch 972PPM pages per minute 973PPP Point-to-Point Protocol 974PPPOA Point-to-Point Protocol over ATM 975PPPOE Point-to-Point Protocol over Ethernet 976PPU physics processing unit 977PRBS pseudo-random bit sequence 978PRML partial response, maximum likelihood 979PRN pseudo random {noise,number} 980PRNG pseudo random number generator 981PROM programmable read only memory 982PSD power spectral density 983PSE page size extensions 984PSK phase shift keying 985PSK pre-shared key 986PSTN public switched telephone network 987PSW program status word 988PTE page table entry 989PTLA pseudo top level aggregator 990PTP page table page 991PTV perceived target value 992PU processing unit 993PUN physical unit number 994PV physical volume 995PVG physical volume group 996PVI protected-mode virtual interrupt 997PWM pulse width modulation 998PXE preboot execution environment 999QA quality assurance 1000QAM quadrature amplitude modulation 1001QAM quality assurance management 1002QBE query by example 1003QC quality control 1004QDI quasi delay insensitive 1005QOS quality of service 1006R/O read only 1007R/W read/write 1008RA receiver address 1009RA remote assistance 1010RA resource affinity 1011RA router advertisement 1012RAD rapid application development 1013RAID redundant array of {independent,inexpensive} disks 1014RAM random access memory 1015RAS reliability, availability and serviceability 1016RAS remote access service 1017RAS restartable atomic sequence 1018RAS row address strobe 1019RBF radial basis function 1020RBT red-black tree 1021RC release candidate 1022RC remote control 1023RCS Revision Control System 1024RCS revision control system 1025RCU read, copy, update 1026RDB Rigid Disk Block 1027RDBMS relational database management system 1028RDF Resource Description Framework 1029RDM relational data model 1030RDMA remote direct memory access 1031RE regular expression 1032REST representational state transfer 1033RF radio frequency 1034RFI radio frequency interference 1035RFO request for ownership 1036RGB red green blue 1037RGBA red green blue alpha 1038RH read hit 1039RHEL Red Hat Enterprise Linux 1040RHL Red Hat Linux 1041RIB routing information base 1042RIFF Resource Interchange File Format 1043RIP Routing Information Protocol 1044RIR regional Internet registry 1045RISC reduced instruction set {computer,computing} 1046RKM ROM Kernel Manual 1047RLE run length encoding 1048RLL run length limited 1049RLO right-to-left override 1050RM read miss 1051RMI remote method invocation 1052RMPM rapid memory power management 1053RMS root mean square 1054RMW read, modify, write 1055RNG random number generator 1056ROM read only memory 1057RPC remote procedure call 1058RPKI resource PKI 1059RPL requested privilege level 1060RPM revolutions per minute 1061RPN reverse Polish notation 1062RR random replacement 1063RR round robin 1064RS relay station 1065RSA Rivest, Shamir, [and] Adleman 1066RSIP Realm Specific IP 1067RSN Robust Secure Network 1068RSS really simple syndication 1069RSS residual sum of squares 1070RT real time 1071RTC real time clock 1072RTC real time computing 1073RTF rich text format 1074RTL register transfer language 1075RTL resistor-transistor logic 1076RTL right to left 1077RTOS real time operating system 1078RTS request to send 1079RTT round trip time 1080RUP rational unified process 1081RWM read-write memory 1082RX {receive,receiver} 1083S/PDIF Sony/Philips Digital Interface Format 1084SA security advisory 1085SA security association 1086SA source address 1087SA structured analysis 1088SAAS software as a service 1089SACD super audio compact disc 1090SAD security association database 1091SAL system abstraction layer 1092SAM serial access memory 1093SAM sum addressed memory 1094SAN storage area network 1095SAPIC streamlined advanced programmable interrupt controller 1096SASD structured analysis, structured design 1097SASI Shugart Associates System Interface 1098SASL simple authentication [and] security layer 1099SATA serial advanced technology attachment 1100SB sound blaster 1101SBU standard build unit 1102SC store conditional 1103SCA source code analyzer 1104SCADA supervisory control and data acquisition 1105SCC single chip cloud 1106SCC source code control 1107SCCS Source Code Control System 1108SCI scalable coherent interface 1109SCI system control interrupt 1110SCM software configuration management 1111SCM source code management 1112SCM storage-class memory 1113SCP secure copy 1114SCSI Small Computer System Interface 1115SCTP Stream Control Transmission Protocol 1116SDI symbol deinterleave 1117SDK software development kit 1118SDL Simple Declarative Language 1119SDL Simple Direct-media Layer 1120SDRAM synchronous dynamic random access memory 1121SDT syntax-directed translation 1122SEGV segmentation violation 1123SEO search engine optimization 1124SFC sequential function chart 1125SFI simple firmware interface 1126SFI software fault isolation 1127SFTP SSH File Transfer Protocol 1128SFTP Serial File Transfer Protocol 1129SFTP Simple File Transfer Protocol 1130SGRAM synchronous graphics random access memory 1131SIEM security information and event management 1132SIFS short inter-frame space 1133SIMD single instruction, multiple data 1134SIMM single inline memory module 1135SIP Session Initiation Protocol 1136SIR signal-to-interference ratio 1137SIR slow infrared 1138SISD single instruction, single data 1139SLC single-level cell 1140SLDRAM synchronous-link dynamic random access memory 1141SLED single large expensive disk 1142SLI scalable link interface 1143SLI scan-line interleave 1144SLOC source lines of code 1145SLRU segmented LRU 1146SMA smart memory access 1147SMAF system management action field 1148SMAP Simple Mail Access Protocol 1149SMAP supervisor mode access prevention 1150SMART self-monitoring analysis and reporting technology 1151SMBIOS System Management BIOS 1152SMC system management controller 1153SMI structure of management information 1154SMI system management interrupt 1155SMM system management mode 1156SMP symmetric multiprocessing 1157SMT simultaneous multithreading 1158SMTP Simple Mail Transfer Protocol 1159SMU system management unit 1160SNMP Simple Network Management Protocol 1161SNR signal-to-noise ratio 1162SOA service oriented architecture 1163SOAP Simple Object Access Protocol 1164SOC system on chip 1165SOF start of frame 1166SOH start of header 1167SOHO small office/home office 1168SOL serial over LAN 1169SP service pack 1170SP stack pointer 1171SPARC scalable processor architecture 1172SPARQL SPARQL Protocol and RDF Query Language 1173SPD security policy database 1174SPD serial presence detect 1175SPDIF Sony/Philips digital interface format 1176SPI serial peripheral interface 1177SPI stateful packet inspection 1178SPMD single process, multiple data 1179SPR special purpose register 1180SPT sectors per track 1181SQA software quality assurance 1182SQL Structured Query Language 1183SRAM static random access memory 1184SRC sample rate conversion 1185SS self-snoop 1186SS stack segment 1187SSB single-sideband modulation 1188SSD solid state drive 1189SSE streaming SIMD extensions 1190SSFDC solid state floppy disc card 1191SSH secure shell 1192SSI server side includes 1193SSID service set identifier 1194SSL secure sockets layer 1195SSP stack smashing protection 1196STC software thermal control 1197STD state transition diagram 1198STP Spanning Tree Protocol 1199STP shielded twisted pair 1200SUS Single Unix Specification 1201SUT system under test 1202SVG scalable vector graphics 1203SVGA Super Video Graphics Array 1204SVM secure virtual machine 1205SVM support vector machine 1206SVR System V Release 1207SWF Shockwave Flash 1208SWIG simplified wrapper [and] interface generator 1209SYR symbol timing recovery 1210TA test assertion 1211TA transmitter address 1212TAI international atomic time 1213TAO track at once 1214TAOCP The Art of Computer Programming 1215TAP Test Anything Protocol 1216TAS test and set 1217TB terabyte 1218TCB trace capture buffer 1219TCB trusted computing base 1220TCC thermal control circuit 1221TCL tool command language 1222TCP Transmission Control Protocol 1223TCQ tagged command queueing 1224TDC time [to] digital converter 1225TDD test driven development 1226TDD time division duplex 1227TDM time division multiplexing 1228TDMA time division multiple access 1229TDOA time difference of arrival 1230TDP thermal design {point,power} 1231TECO Text Editor and Corrector 1232TFT thin film transistor 1233TFTP Trivial File Transfer Protocol 1234TIAS try it and see 1235TIFF tagged image file format 1236TITS try it to see 1237TK temporal key 1238TKIP Temporal Key Integrity Protocol 1239TLA top level aggregator 1240TLB translation lookaside buffer 1241TLD top level domain 1242TLS thread local storage 1243TLS transport layer security 1244TM Turing machine 1245TM thermal monitor 1246TMDS transition minimized differential signaling 1247TMO timeout 1248TOD time of day 1249TOS terms of service 1250TOS trusted operating system 1251TOS type of service 1252TP transaction processing 1253TPI tracks per inch 1254TPM transactions per minute 1255TPM trusted platform module 1256TPR task priority register 1257TPS transactions per second 1258TPS transmission parameters signaling 1259TR task register 1260TR token ring 1261TRL timing recovery loop 1262TRNG true random number generator 1263TS terminal services 1264TS time series 1265TS time stamp 1266TS transport stream 1267TSC time stamp counter 1268TSD time stamp disable 1269TSL test, set, lock 1270TSO time sharing option 1271TSP Time-Stamp Protocol 1272TSP Tunnel Setup Protocol 1273TSP time synchronization protocol 1274TSP traveling salesman problem 1275TSS task state segment 1276TTL time to live 1277TTL transistor-transistor logic 1278TTM translation table maps 1279TTY teletype 1280TUI {terminal,text-based,textual} user interface 1281TX {transmit out,transmitter} 1282TZ time zone 1283UAC user {access,account} control 1284UAF use-after-free 1285UART universal asynchronous receiver/transmitter 1286UAT user acceptance testing 1287UC uncacheable 1288UCS uniform-cost search 1289UDMA ultra DMA 1290UDO ultra density optical 1291UDP User Datagram Protocol 1292UEFI unified extensible firmware interface 1293UFS Unix File System 1294UGA universal graphics adapter 1295UI unit interval 1296UI user interface 1297UID unique identifier 1298UID user identifier 1299UL upload 1300UMA uniform memory access 1301UMA upper memory area 1302UMB upper memory block 1303UML unified modeling language 1304UMPC ultra-mobile PC 1305UPNP universal plug and play 1306UPS uninterruptible power supply 1307URI uniform resource identifier 1308URL uniform resource locator 1309URN uniform resource name 1310USART universal synchronous/asynchronous receiver/transmitter 1311USB universal serial bus 1312USWC uncacheable speculative write combining 1313UT unit test 1314UTC coordinated universal time 1315UTP unshielded twisted pair 1316UUCP Unix-to-Unix Copy Protocol 1317UUID universally unique identifier 1318UUOC useless use of cat 1319UUT unit under test 1320UX user experience 1321VA vertical alignment 1322VA virtual address 1323VA volt-ampere 1324VAX virtual address extension 1325VB Visual Basic 1326VCA variable-gain amplifier 1327VCC common collector voltage 1328VCF voltage-controlled filter 1329VCM virtual channel memory 1330VCO voltage-controlled oscillator 1331VCS version control system 1332VESA Video Electronics Standards Association 1333VFO variable-frequency oscillator 1334VG volume group 1335VGA Video Graphics Array 1336VHDCI very high density cable interconnect 1337VID voltage level identifier 1338VIPT virtually indexed, physically tagged 1339VIVT virtually indexed, virtually tagged 1340VLAN virtual local area network 1341VLIW very long instruction word 1342VLSI very large scale integration 1343VLSM variable length subnet mask 1344VM virtual {machine,memory} 1345VME virtual mode extension 1346VMX vector multimedia extensions 1347VMX virtual machine extensions 1348VOD video on demand 1349VPN virtual private network 1350VR virtual reality 1351VRAM video random access memory 1352VRM voltage regulator module 1353VRRP Virtual Router Redundancy Protocol 1354W watt 1355W3C World Wide Web Consortium 1356WAN wide area network 1357WAP Wireless Application Protocol 1358WAP wireless access point 1359WDT watchdog timer 1360WEP Wired Equivalent Privacy 1361WFI wait for interrupt 1362WFQ weighted fair queuing 1363WH write hit 1364WIFI wireless fidelity 1365WLAN wireless local area network 1366WM write miss 1367WMI Windows Management Instrumentation 1368WOL Wake-on-LAN 1369WOM Wake-on-Modem 1370WOR Wake-on-Ring 1371WORM write once read many 1372WP WordPerfect 1373WP word processor 1374WP write protect 1375WPA Wi-Fi Protected Access 1376WPA2 Wi-Fi Protected Access II 1377WPS Wi-Fi Protected Setup 1378WRAM window random access memory 1379WS web services 1380WTC write through caching 1381WWAN wireless wide area network 1382WWW world wide web 1383WYSIWYG what you see is what you get 1384XBAR crossbar 1385XDMCP X Display Manager control protocol 1386XER XML encoding rules 1387XGA Extended Graphics Array 1388XIP execute in place 1389XML Extensible Markup Language 1390XOR exclusive or 1391XP extreme programming 1392XSI X/Open System Interface 1393XSL extensible stylesheet language 1394XSS cross site scripting 1395XT extended technology 1396XUL XML user interface language 1397YACC yet another compiler compiler 1398YAWPFAPR you are welcome; please file a problem report 1399YP Yellow Pages 1400YTD year to date 1401ZBR zone bit recording 1402ZFOD zero-filled on demand 1403ZIF zero insertion force 1404ZIFS zero insertion force socket 1405ZMA zone multicast address 1406