1$NetBSD: acronyms.comp,v 1.141 2013/09/28 18:01:49 dholland 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 40AM access method 41AM alignment mask 42AM amplitude modulation 43AMI alternate mark inversion 44AMQP advanced message queuing protocol 45AMT active management technology 46AN Arabic number 47ANSI American National Standards Institute 48AO analog output 49AOL Alert-on-LAN 50AOS add or subtract 51AP access point 52AP application processor 53API application programming interface 54APIC advanced programmable interrupt controller 55APIPA automatic private IP addressing 56AQM active queue management 57ARAT always running APIC timer 58ARC adaptive replacement cache 59ARM Advanced RISC Machines 60ARP Address Resolution Protocol 61ARPA Advanced Research Projects Agency 62ARQ automatic repeat request 63ARR address range register 64ARU audio response unit 65AS autonomous system 66ASC advanced smart cache 67ASCII American Standard Code for Information Interchange 68ASD agile software development 69ASE advanced software environment 70ASIC application-specific integrated circuit 71ASK amplitude shif keying 72ASLR address space layout randomization 73ASN autonomous system number 74ASPM active state power management 75ASQ automated software quality 76ASR address space register 77AST abstract syntax tree 78AST asynchronous trap 79AT access time 80AT advanced technology 81ATA advanced technology attachment 82ATAPI advanced technology attachment packet interface 83ATC address translation cache 84ATM asynchronous transfer mode 85ATX advanced technology extended 86AV anti virus 87AVL Adelson-Velsky-Landis 88AVX advanced vector extensions 89BA byte align 90BAL basic assembly language 91BAR base address register 92BBS bulletin board system 93BCC blind carbon copy 94BCD binary coded decimal 95BCR byte count register 96BCS base configuration space 97BD baud 98BDD binary decision diagram 99BDI bit deinterleave 100BDUF big design up front 101BEDO burst extended data output 102BER basic encoding rules 103BER bit error {rate,ratio} 104BFD binary {file,format} descriptor 105BFKL big fscking kernel lock 106BFS breadth-first search 107BFT binary file transfer 108BGA ball grid array 109BGP Border Gateway Protocol 110BIND Berkeley Internet Name Daemon 111BIOS Basic Input/Output System 112BIOS built-in operating system 113BIST built-in self-test 114BIU bus interface unit 115BKDG BIOS and kernel developer's guide 116BLAS basic linear algebra subprograms 117BLC back light control 118BLOB binary large object 119BM bus master 120BMC baseboard management controller 121BMIC bus master interface controller 122BN boundary neutral 123BNF Backus-Naur form 124BO binary output 125BOF beginning of file 126BOM beginning of message 127BOM byte order mark 128BP base pointer 129BP boot processor 130BPB BIOS parameter block 131BPF Berkeley Packet Filter 132BPI bits per inch 133BPM business process modelling 134BPS bits per second 135BPSK binary phase shift keying 136BQS Berkeley quality software 137BRE basic regular expression 138BS backspace 139BS binary sequence 140BSA basic service area 141BSD Berkeley Software Distribution 142BSF bit scan forward 143BSOD blue screen of death 144BSP binary space partition 145BSP bootstrap processor 146BSR bit scan reverse 147BSS basic service set 148BSS block started by symbol 149BSSID basic service set identifier 150BT BitTorrent 151BT Bluetooth 152BT bit test 153BTC bit test [and] complement 154BTR bit test [and] reset 155BTS bit test [and] set 156BTS bits per second 157BW bandwidth 158BWM block-write mode 159CA certificate authority 160CAD computer-aided design 161CAM computer assisted manufacturing 162CAM conditional access module 163CAM content addressable memory 164CARP Common Address Redundancy Protocol 165CAS column address strobe 166CAS compare and swap 167CAS computer algebra system 168CASE computer aided software engineering 169CAU control access unit 170CAV constant angular velocity 171CBC cipher block chaining 172CBR constant bit rate 173CC carbon coby 174CCD charge coupled device 175CCI co-channel interferer 176CD cache disable 177CD compact disc 178CDDA compact disc digital audio 179CDMA code division multiple access 180CDRAM cache dynamic random access memory 181CER canonical encoding rules 182CF compact flash 183CFG context-free grammar 184CFG control-flow graph 185CG control gate 186CGA Color Graphics Adapter 187CGI common gateway interface 188CGN Carrier-Grade NAT 189CHAP Challenge-Handshake Authentication Protocol 190CHS cylinder/head/sector 191CI continuous integration 192CI {common,component} interface 193CIDR Classless Inter-Domain Routing 194CIFS Common Internet File System 195CIL common intermediate language 196CIR carrier-to-interference ratio 197CIS contact image sensor 198CISC complex instruction set {computer,computing} 199CJK Chinese, Japanese, [and] Korean 200CLF common log format 201CLI command line interface 202CLR common language runtime 203CLTT closed loop thermal throttling 204CLUT color look-up table 205CLV constant linear velocity 206CM configuration management 207CMA concert multithread architecture 208CMI control management interface 209CMI control method interface 210CMOS complementary metal-oxide-semiconductor 211CMP chip multi-processing 212CMS content management system 213CMYK cyan magenta yellow black 214CN {common,canonical} name 215CNC computer numerical control 216CNR carrier-to-noise ratio 217COF current operating frequency 218COFDM coded orthogonal frequency division multiplexing 219COFF common object file format 220COM component object model 221COMA cache-only memory architecture 222CORBA common object request broker architecture 223COW copy-on-write 224CP continuous pilot 225CPB core performance boost 226CPE common phase error 227CPG clock pulse generator 228CPL current privilege level 229CPLD complex programmable logic device 230CPP C preprocessor 231CPS characters per second 232CPT command pass through 233CPU central processing unit 234CR carriage return 235CRC cyclic redundancy check 236CRL carrier recovery loop 237CRLF carriage return line feed 238CRT cathode ray tube 239CS cable select 240CS chip select 241CS code segment 242CS computer science 243CSI channel state information 244CSI common system interface 245CSMA carrier sense multiple access 246CSMA/CA carrier sense multiple access with collision avoidance 247CSMA/CD carrier sense multiple access with collision detection 248CSR control [and] status registers 249CSRG Computer Systems Research Group 250CSS cascading style sheets 251CSV comma-separated values 252CTM close to metal 253CTS clear to send 254CUA common user access 255CUT coordinated universal time 256CV control voltage 257CVS Concurrent Versions System 258DA destination address 259DAA distributed application architecture 260DAB digital audio broadcasting 261DAC digital [to] analog converter 262DAC discretionary access control 263DAD duplicate address detection 264DAO disk at once 265DAP Directory Access Protocol 266DAT digital audio tape 267DAT dynamic acceleration technology 268DB database 269DBA database administrator 270DBA dynamic bandwidth allocation 271DBB data bus buffer 272DBC design by contract 273DBL dynamic buffer limiting 274DBMS database management system 275DBS database server 276DC direct current 277DCC Direct Client-to-Client 278DCC direct cable connect 279DCD data carrier detect 280DCE data control equipment 281DCE distributed computing environment 282DCOM distributed component object model 283DCOP Desktop COmmunication Protocol 284DCS data collection systems 285DCT discrete cosine transform 286DCU data cache unit 287DDC display data channel 288DDE dynamic data exchange 289DDK device driver kit 290DDL data description language 291DDR double data rate 292DDS direct digital sound 293DDWG Digital Display Working Group 294DE debugging extensions 295DE desktop environment 296DEA data encryption algorithm 297DEK data encryption key 298DEP data execution prevention 299DER distinguished encoding rules 300DES Data Encryption Standard 301DF don't fragment 302DFA deterministic finite automaton 303DFC data flow control 304DFS depth first search 305DFS distributed file system 306DFT diagnostic function test 307DFT discrete Fourier transform 308DGL data generation language 309DH Diffie-Hellman 310DHCP Dynamic Host Configuration Protocol 311DIFS distributed inter-frame space 312DIMM dual inline memory module 313DIRT design in real time 314DL diode logic 315DL discrete logarithm 316DL download 317DLE data link escape 318DLL dynamic link library 319DLP discrete logarithm problem 320DMA direct memory access 321DMI desktop management interface 322DMS document management system 323DMT discrete multitone modulation 324DNARD Digital network appliance reference design 325DND drag and drop 326DNS Domain Name System 327DOE distributed object environment 328DOF data over fibre 329DOM document object model 330DOS denial of service 331DOS disk operating system 332DP DisplayPort 333DPC deferred procedure call 334DPCM differential pulse code modulation 335DPD dead peer detection 336DPI deep packet inspection 337DPI dots per inch 338DPL descriptor privilege level 339DPS Display PostScript 340DPST display power savings technology 341DRAM dynamic random access memory 342DRI direct rendering infrastructure 343DRM digital rights management 344DRRS display refresh rate switching 345DS debug store 346DSA digital signature algorithm 347DSB double-sideband modulation 348DSDT differentiated system descriptor table 349DSL digital subscriber line 350DSL domain specific language 351DSLAM digital subscriber line access multiplexer 352DSN delivery status notification 353DSO dynamic shared object 354DSP digital signal processor 355DSSS direct sequence spread spectrum 356DTD document type definition 357DTE data terminal equipment 358DTE dumb terminal emulator 359DTL diode-transistor logic 360DTS digital thermal sensor 361DUT device under test 362DVB digital video broadcasting 363DVCS distributed version control system 364DVD digital versatile disc 365DVFS dynamic voltage and frequency scaling 366DVI device independent 367DVI Digital Visual Interface 368DVR digital video recorder 369E-XER extended XML encoding rules 370EABI embedded-application binary interface 371EAP Extensible Authentication Protocol 372EBR extended boot record 373EC elliptical curve 374ECC error correction code 375ECDL elliptical curve discrete logarithm 376ECDSA elliptical curve digital signature algorithm 377ECL emitter-coupled logic 378ECN explicit congestion notification 379ECP enhanced capability port 380ECS enhanced chip set 381ECS extended configuration space 382EDAT enhanced dynamic acceleration technology 383EDGE explicit data graph execution 384EDID extended display identification data 385EDO extended data out 386EDS electronical data sheet 387EEPROM electrically erasable programmable read only memory 388EFI extensible firmware interface 389EFL emitter follower logic 390EFM eight to fourteen modulation 391EGA Enhanced Graphics Adapter 392EGP exterior gateway protocol 393EH extension header 394EIDE enchanced IDE 395EISA extended industry standard architecture 396ELF executable and linking format 397ELS entry level system 398EMI electro-magnetic interference 399EMP electro-magnetic pulse 400EMR electro-magnetic radiation 401EOF end of file 402EOI end of interrupt 403EOL end of line 404EOT end of transmission 405EPIC explicitly parallel instruction computing 406EPP enhanced parallel port 407EPRML extended partial response, maximum likelihood 408EPROM erasable programmable read only memory 409ERD emergency recovery disk 410ERD entity relationship diagram 411ERE extended regular expression 412ESDRAM enhanced synchronous dynamic random access memory 413ESS electronic switching system 414ESS extended service set 415ESSID extended service set identifier 416EST enhanced speedstep 417ETL extract, transform, load 418EU execution unit 419EULA end user license agreement 420FAT file allocation table 421FBRAM frame buffer random access memory 422FCL fiber channel loop 423FCS frame check sequence 424FDC floppy disk controller 425FDD floppy disk drive 426FDDI fiber distributed data interface 427FDE full disk encryption 428FEA finite element analysis 429FEC forward error correction 430FET field-effect transistor 431FF form feed 432FFH functional fixed hardware 433FFI foreign function interface 434FFM focus follows mouse 435FFS Fast File System 436FFS find first set 437FFT fast Fourier transform 438FG floating gate 439FHSS frequency hop spread spectrum 440FID frequency identifier 441FIFO first in, first out 442FILO first in, last out 443FIR fast infrared 444FLOPS floating [point] operations per second 445FLOSS free/libre/open source software 446FM frequency modulation 447FMR false match rate 448FOSS free/open source software 449FPGA field programmable gate array 450FPM fast page mode 451FPR floating point register 452FPU floating point unit 453FQDN fully qualified domain name 454FRR false rejection rate 455FRU field replaceable unit 456FS file system 457FSB front side bus 458FSCK file system check 459FSF Free Software Foundation 460FSK frequency shift keying 461FSM finite-state machine 462FTA fault tree analysis 463FTL flash translation layer 464FTP File Transfer Protocol 465FTPS File Transfer Protocol Secure 466FUS fast user switching 467FWH firmware hub 468FWS folding white space 469GAL generic array logic 470GAS generic address structure 471GC garbage collector 472GCR group-coded recording 473GDT global descriptor table 474GEM graphics environment manager 475GEM graphics execution manager 476GENA general event notification architecture 477GHC Glasgow Haskell compiler 478GID group identifier 479GIF graphics interchange format 480GMCH graphics and memory controller hub 481GNU GNU's Not Unix 482GOT global offset table 483GPE general purpose event 484GPF general protection fault 485GPG GNU Privacy Guard 486GPL [GNU] General Public License 487GPR general purpose register 488GPS generalized processor sharing 489GPT GUID partition table 490GPU graphics processing unit 491GR golden ratio 492GRE generic routing encapsulation 493GSI global system interrupt 494GUI graphical user interface 495GUID globally unique identifier 496HA high availability 497HAL hardware abstraction layer 498HAT hashed array tree 499HBA host bus adapter 500HCF halt and catch fire 501HCI host controller interface 502HCI human-computer interaction 503HCL hardware compatibility list 504HDCP High-bandwidth Digital Content Protection 505HDD hard disk drive 506HDL hardware description language 507HDMI High-Definition Multimedia Interface 508HDTV high-definition television 509HF high frequency 510HFM highest frequency mode 511HID human interface device 512HLL high-level language 513HMA high memory area 514HMI human-machine interface 515HOOD hierarchical object oriented design 516HP Hewlett-Packard 517HPC high performance computing 518HPET high precision event timer 519HT hyper-threading 520HTC hardware thermal control 521HTCC high temperature co-fired ceramic 522HTML HyperText Markup Language 523HTT hyper-threading technology 524HTTP Hypertext Transfer Protocol 525HTTPS Hypertext Transfer Protocol Secure 526HVM hardware virtual machine 527HZ Hertz 528I2O intelligent input/output 529IA information assurance 530IANA Internet Assigned Numbers Authority 531IBC iterated block cipher 532IBM International Business Machines 533IBS instruction based sampling 534IBSS independent basic service set 535IC integrated circuit 536ICA independent computer architecture 537ICB Internet Citizen's Band 538ICE in-circuit emulator 539ICE internal compiler error 540ICH I/O controller hub 541ICMP Internet Control Message Protocol 542ICT information and communications technology 543ICW initialization command word 544IDA Intel dynamic acceleration 545IDCMP Intuition direct communication message port 546IDE integrated development environment 547IDE integrated drive electronics 548IDPS intrusion detection [and] prevention system 549IDRP inter-domain routing protocol 550IDS intrusion detection system 551IDT interrupt descriptor table 552IE Internet Explorer 553IEC International Electrotechnical Commission 554IEEE Institute of Electrical and Electronics Engineers 555IESG Internet Engineering Steering Group 556IETF Internet Engineering Task Force 557IF intermediate frequency 558IFCM isochronous flow control mode 559IFF Interchange File Format 560IGD Internet gateway device 561IGMP Internet Group Management Protocol 562IGP interior gateway protocol 563IHV independent hardware vendor 564IKE Internet key exchange 565ILM internal loopback mode 566ILOM integrated lights-out management 567ILP instruction level parallelism 568IM instant messaging 569IMAP Internet Message Access Protocol 570IMC integrated memory controller 571IMCR interrupt mode configuration register 572IMR interrupt mask register 573IMS information management system 574INCITS InterNational Committee for Information Technology Standards 575IO input/output 576IOCTL input/output control 577IOMMU input/output memory management unit 578IP Internet Protocol 579IP intellectual property 580IPC interprocess communication 581IPE integrated programming environment 582IPI interprocessor interrupt 583IPNG Internet Protocol, Next Generation 584IPS in-plane switching 585IPS intrusion prevention system 586IPSEC Internet Protocol Security 587IRC Internet Relay Chat 588IRDA infrared data association 589IRQ interrupt request 590IRQL interrupt request level 591IRR interrupt request register 592IRTF Internet Research Task Force 593IS information system 594ISA industry standard architecture 595ISA instruction set architecture 596ISDN integrated services digital network 597ISI inter-symbol interference 598ISM industrial, scientific, [and] medical 599ISN initial serial number 600ISO International Standards Organization 601ISOC Internet Society 602ISP Internet service provider 603ISR in-service register 604ISR interrupt service routine 605IST interrupt stack table 606ISV independent software vendor 607IT information technology 608ITB Intel Turbo Boost 609IV initialization vector 610IVT interrupt vector table 611JBOD just a bunch of disks 612JFET junction [gate] field-effect transistor 613JIT just in time 614JPEG Joint Photographic Experts Group 615JRE Java Runtime Environment 616JTAG joint test action group 617KB keyboard 618KB kilobyte 619KBD keyboard 620KBD kilobaud 621KLOC thousand lines of code 622KMS kernel-mode setting 623KPI kernel programming interface 624KVA kernel virtual address 625KVM kernel virtual machine 626KVM kernel virtual memory 627KVM keyboard, video, [and] mouse 628LAMP Linux Apache MySQL {Perl,PHP,Python} 629LAN local area network 630LAPIC local advanced programmable interrupt controller 631LAR load access rights 632LBA logical block addressing 633LBS location-based service 634LCD liquid crystal display 635LCP link control protocol 636LDA local delivery agent 637LDAP Lightweight Directory Access Protocol 638LDR light-dependent resistor 639LDT local descriptor table 640LE logical extent 641LED light emitting diode 642LER label edge router 643LF line feed 644LF low frequency 645LFM lowest frequency mode 646LFN long file names 647LFO low-frequency oscillation 648LFS log-structured file system 649LFU least frequently used 650LHP loop heat pipe 651LIFO last in, first out 652LILO LInux LOader 653LILO last in, last out 654LINT local interrupt 655LIR local Internet registry 656LKM {Linux,loadable} kernel module 657LKML Linux kernel mailing list 658LL load linked 659LL/SC load linked/store conditional 660LLC logical link control 661LLF low level format 662LLMNR link-local multicast name resolution 663LLVM Low Level Virtual Machine 664LM long mode 665LMM link management mode 666LNO loop nest optimization 667LOC lines of code 668LOM lights-out management 669LPC low pin count 670LPS local positioning system 671LRC longitudinal redundancy check 672LRM left-to-right mark 673LRO left-to-right override 674LRU least recently used 675LSB Linux standards base 676LSB least significant {bit,byte} 677LSI large scale integration 678LSL load segment limit 679LSN Large Scale NAT 680LSN log sequence number 681LSR label switch router 682LTCC low temperature co-fired ceramic 683LTR left to right 684LTR load task register 685LTR letter(-sized paper) 686LUN logical unit number 687LV logical volume 688LVM logical volume management 689LVT local vector table 690LWP light-weight process 691LZW Lempel Ziv Welch 692MAC mandatory access control 693MAC medium access control 694MAC message authentication {check,code} 695MADT multiple APIC descriptor table 696MB megabyte 697MBR master boot record 698MBS megabits per second 699MC memory controller 700MCA machine check architecture 701MCA MicroChannel architecture 702MCC multiversion concurrency control 703MCE machine check exception 704MCGA Multi-Color Graphics Array 705MCH memory controller hub 706MCM multi-chip module 707MCQ memory controlled queue 708MD machine-dependent 709MDA mail delivery agent 710MDA Monochrome Display Adapter 711MDRAM multibank dynamic random access memory 712MESI modified, exclusive, shared, invalid 713MFC merge from current 714MFC Microsoft Foundation Classes 715MFM modified frequency modulation 716MI machine-independent 717MIB management information base 718MIC message integrity {check,code} 719MID mobile Internet device 720MIDI musical instrument digital interface 721MIF management information format 722MIM man in the middle 723MIMD multiple instruction, multiple data 724MIME Multipurpose Internet Mail Extensions 725MIMO multiple input multiple output 726MIPS million instructions per second 727MISD multiple instruction, single data 728MIT Massachusetts Institute of Technology 729MITM man in the middle 730ML machine language 731ML machine learning 732ML mailing list 733ML markup language 734ML maximum likelihood 735MLC multi-level cell 736MLHP micro loop heat pipe 737MMIC monolithic microwave integrated circuit 738MMIO memory mapped input/output 739MMU memory management unit 740MMX matrix math extension 741MMX multimedia extension 742MMX multiple math extension 743MO magneto-optical 744MOESI modified, owned, exclusive, shared, invalid 745MOF maximum operating frequency 746MOSFET metal-oxide-semiconductor field-effect transistor 747MOSI modified, owned, shared, invalid 748MP multi-platform 749MP multiplayer 750MP {multiprocessing,multiprocessor} 751MPEG moving picture experts group 752MPI message passing interface 753MPLS Multiprotocol Label Switching 754MPP massively parallel processor 755MPS memory pool system 756MPS multiprocessor specification 757MR modem ready 758MRU most recently used 759MS Microsoft 760MSB most significant {bit,byte} 761MSE mean square error 762MSF minutes seconds frames 763MSI message signaled interrupt 764MSI modified, shared, invalid 765MSR machine state register 766MSS maximum segment size 767MT machine translation 768MTA mail transfer agent 769MTBF mean time between failures 770MTRR memory type range register 771MTTF mean time to failure 772MTU maximum transmission unit 773MUA mail user agent 774MUD multi-user domain 775MVCC multiversion concurrency control 776MWE module width encoding 777MX mail exchange 778NACK negative acknowledgement 779NAN not a number 780NAPT Network Address Port Translation 781NAS network attached storage 782NAT network address translation 783NAV network allocation vector 784NC numerical control 785NCO numerically-controlled oscillator 786NCP Network Control Protocol 787NCQ native command queuing 788ND neighbor discovery 789NDFA nondeterministic finite automaton 790NE numeric error 791NFA nondeterministic finite automaton 792NFS network file system 793NIA next instruction address 794NIC network information center 795NIC network interface card 796NIDS network intrusion detection system 797NIP network interface protocol 798NIPS network intrusion prevention system 799NIS network information service 800NLS native language support 801NMI non-maskable interrupt 802NNTP Network News Transfer Protocol 803NOC network operations center 804NOP no operation 805NOS network operating system 806NP nondeterministic polynomial time 807NRZ non-return to zero 808NSA National Security Agency 809NTM non-deterministic Turing machine 810NTP Network Time Protocol 811NUMA non-uniform memory access 812NVRAM non-volatile random access memory 813NW not write-through 814NX no execute 815OAEP optimal asymmetric encryption padding 816OBO off by one 817OBOE off by one error 818OCL object constraint language 819OCR optical character recognition 820ODCM on-demand clock modulation 821ODT on-die termination 822OEM original equipment manufacturer 823OFDM orthogonal frequency division multiplexing 824OFET organic field-effect transistor 825OLAP online analytical processing 826OLE object linking and embedding 827OLTP online transaction processing 828ONFI open nand flash interface 829OO OpenOffice 830OO object oriented 831OOB out of band 832OOE out of order execution 833OOM out of memory 834OOO OpenOffice.org 835OOP object oriented programming 836OOPS object oriented programming systems 837OOSE object oriented software engineering 838OPM operations per minute 839OPS operations per second 840OQL Object Query Language 841ORB object request broker 842ORM object-relational mapping 843OS operating system 844OSD open source definition 845OSF open software foundation 846OSI Open Source Initiative 847OSI open systems interconnection 848OSPF open shortest path first 849OSPM OS power management 850OSS open sound system 851OSS open source software 852OSVW operating system visible workarounds 853OTP one time password 854OTP open telecom platform 855OU organizational unit 856OUI organizationally unique identifier 857OWL Web Ontology Language 858P2P PCI to PCI 859P2P peer to peer 860PA phase accumulator 861PA physical address 862PAC phase-amplitude converter 863PAE physical address extension 864PAL phase alternating line 865PAL programmable array logic 866PAM pluggable authentication modules 867PAM pulse amplitude modulation 868PAP password authentication protocol 869PAT page attribute table 870PAT port address translation 871PATA parallel ATA 872PAX portable archive exchange 873PBE pending break encoding 874PBE programming by example 875PC personal computer 876PC program counter 877PCB printed circuit board 878PCC Portable C Compiler 879PCD page-level cache disable 880PCE performance-monitor counter enable 881PCI peripheral component interconnect 882PCM phase change memory 883PCM pulse code modulation 884PCMCIA Personal Computer Memory Card International Association 885PD public domain 886PDA personal digital assistant 887PDA pushdown automaton 888PDAG propositional directed acyclic graph 889PDB power distribution board 890PDF portable document format 891PDM pulse-duration modulation 892PDN pull-down network 893PDP page {descriptor,directory} page 894PDS product data sheet 895PDU protocol data unit 896PE protection enable 897PECI platform environment control interface 898PEP protocol extension protocol 899PER packed encoding rules 900PFS perfect forward secrecy 901PGAS partitioned global address space 902PGE page global enable 903PGP Pretty Good Privacy 904PHB PCI host bridge 905PHP PHP: Hypertext Preprocessor 906PIC position independent code 907PIC programmable interrupt controller 908PICNIC problem in chair, not in computer 909PID process id 910PIE position independent executable 911PIM personal information manager 912PIM platform-independent model 913PIO programmed input/output 914PIPT physically indexed, physically tagged 915PIQ prefetch input queue 916PIT programmable interrupt timer 917PIV personal identity verification 918PKCS public-key cryptography standards 919PKI public key infrastructure 920PLC programmable logic controller 921PLD programmable logic device 922PLL phase locked loop 923PLRU pseudo LRU 924PLTM package level thermal management 925PM power management 926PM {phase,pulse} modulation 927PME power management event 928PMI platform management interrupt 929PMIO port-mapped input/output 930PMT photo-multiplier tube 931PMU power management unit 932PNG portable network graphics 933PNP plug and play 934POE power over ethernet 935POF probability of failure 936POP Post Office Protocol 937POP power on password 938POSIX Portable Operating System Interface [for Unix] 939POST power on self test 940POTS plain old telephone system 941PP pair programming 942PPB PCI [to] PCI bridge 943PPC PowerPC 944PPI pixels per inch 945PPM pages per minute 946PPP Point-to-Point Protocol 947PPPOA Point-to-Point Protocol over ATM 948PPPOE Point-to-Point Protocol over Ethernet 949PPU physics processing unit 950PRBS pseudo-random bit sequence 951PRML partial response, maximum likelihood 952PRN pseudo random {noise,number} 953PRNG pseudo random number generator 954PROM programmable read only memory 955PSD power spectral density 956PSE page size extensions 957PSK phase shift keying 958PSK pre-shared key 959PSTN public switched telephone network 960PSW program status word 961PTE page table entry 962PTLA pseudo top level aggregator 963PTP page table page 964PTV perceived target value 965PU processing unit 966PUN physical unit number 967PV physical volume 968PVG physical volume group 969PVI protected-mode virtual interrupt 970PWM pulse width modulation 971PXE preboot execution environment 972QA quality assurance 973QAM quadrature amplitude modulation 974QAM quality assurance management 975QBE query by example 976QC quality control 977QDI quasi delay insensitive 978QOS quality of service 979R/O read only 980R/W read/write 981RA receiver address 982RA remote assistance 983RA resource affinity 984RA router advertisement 985RAD rapid application development 986RAID redundant array of {independent,inexpensive} disks 987RAM random access memory 988RAS remote access service 989RAS restartable atomic sequence 990RAS row address strobe 991RBF radial basis function 992RBT red-black tree 993RC release candidate 994RC remote control 995RCS Revision Control System 996RCS revision control system 997RCU read, copy, update 998RDB Rigid Disk Block 999RDBMS relational database management system 1000RDF Resource Description Framework 1001RDM relational data model 1002RDMA remote direct memory access 1003RE regular expression 1004REST representational state transfer 1005RF radio frequency 1006RFI radio frequency interference 1007RFO request for ownership 1008RGB red green blue 1009RGBA red green blue alpha 1010RH read hit 1011RHEL Red Hat Enterprise Linux 1012RHL Red Hat Linux 1013RIB routing information base 1014RIFF Resource Interchange File Format 1015RIP Routing Information Protocol 1016RIR regional Internet registry 1017RISC reduced instruction set {computer,computing} 1018RKM ROM Kernel Manual 1019RLE run length encoding 1020RLL run length limited 1021RLO right-to-left override 1022RM read miss 1023RMI remote method invocation 1024RMPM rapid memory power management 1025RMS root mean square 1026RMW read, modify, write 1027RNG random number generator 1028ROM read only memory 1029RPC remote procedure call 1030RPL requested privilege level 1031RPM revolutions per minute 1032RPN reverse Polish notation 1033RR random replacement 1034RR round robin 1035RS relay station 1036RSA Rivest, Shamir, [and] Adleman 1037RSIP Realm Specific IP 1038RSS really simple syndication 1039RSS residual sum of squares 1040RT real time 1041RTC real time clock 1042RTC real time computing 1043RTF rich text format 1044RTL register transfer language 1045RTL resistor-transistor logic 1046RTL right to left 1047RTOS real time operating system 1048RTS request to send 1049RTT round trip time 1050RUP rational unified process 1051RWM read-write memory 1052RX {receive,receiver} 1053S/PDIF Sony/Philips Digital Interface Format 1054SA security advisory 1055SA security association 1056SA source address 1057SA structured analysis 1058SAAS software as a service 1059SACD super audio compact disc 1060SAD security association database 1061SAL system abstraction layer 1062SAM serial access memory 1063SAM sum addressed memory 1064SAN storage area network 1065SAPIC streamlined advanced programmable interrupt controller 1066SASD structured analysis, structured design 1067SASI Shugart Associates System Interface 1068SASL simple authentication [and] security layer 1069SATA serial advanced technology attachment 1070SB sound blaster 1071SBU standard build unit 1072SC store conditional 1073SCA source code analyzer 1074SCADA supervisory control and data acquisition 1075SCC single chip cloud 1076SCC source code control 1077SCCS Source Code Control System 1078SCI scalable coherent interface 1079SCI system control interrupt 1080SCM software configuration management 1081SCM source code management 1082SCM storage-class memory 1083SCP secure copy 1084SCSI Small Computer System Interface 1085SCTP Stream Control Transmission Protocol 1086SDI symbol deinterleave 1087SDK software development kit 1088SDL Simple Declarative Language 1089SDL Simple Direct-media Layer 1090SDRAM synchronous dynamic random access memory 1091SDT syntax-directed translation 1092SEGV segmentation violation 1093SEO search engine optimization 1094SFC sequential function chart 1095SFI simple firmware interface 1096SFI software fault isolation 1097SFTP SSH File Transfer Protocol 1098SFTP Serial File Transfer Protocol 1099SFTP Simple File Transfer Protocol 1100SGRAM synchronous graphics random access memory 1101SIFS short inter-frame space 1102SIMD single instruction, multiple data 1103SIMM single inline memory module 1104SIP Session Initiation Protocol 1105SIR signal-to-interference ratio 1106SIR slow infrared 1107SISD single instruction, single data 1108SLC single-level cell 1109SLDRAM synchronous-link dynamic random access memory 1110SLED single large expensive disk 1111SLI scalable link interface 1112SLI scan-line interleave 1113SLOC source lines of code 1114SLRU segmented LRU 1115SMA smart memory access 1116SMAF system management action field 1117SMART self-monitoring analysis and reporting technology 1118SMBIOS System Management BIOS 1119SMC system management controller 1120SMI structure of management information 1121SMI system management interrupt 1122SMM system management mode 1123SMP symmetric multiprocessing 1124SMT simultaneous multithreading 1125SMTP Simple Mail Transfer Protocol 1126SMU system management unit 1127SNMP Simple Network Management Protocol 1128SNR signal-to-noise ratio 1129SOA service oriented architecture 1130SOAP Simple Object Access Protocol 1131SOC system on chip 1132SOF start of frame 1133SOH start of header 1134SOHO small office/home office 1135SOL serial over LAN 1136SP service pack 1137SP stack pointer 1138SPARC scalable processor architecture 1139SPARQL SPARQL Protocol and RDF Query Language 1140SPD security policy database 1141SPD serial presence detect 1142SPDIF Sony/Philips digital interface format 1143SPI serial peripheral interface 1144SPI stateful packet inspection 1145SPMD single process, multiple data 1146SPR special purpose register 1147SPT sectors per track 1148SQA software quality assurance 1149SQL Structured Query Language 1150SRAM static random access memory 1151SRC sample rate conversion 1152SS self-snoop 1153SS stack segment 1154SSB single-sideband modulation 1155SSD solid state drive 1156SSE streaming SIMD extensions 1157SSFDC solid state floppy disc card 1158SSH secure shell 1159SSI server side includes 1160SSID service set identifier 1161SSL secure sockets layer 1162SSP stack smashing protection 1163STC software thermal control 1164STD state transition diagram 1165STP Spanning Tree Protocol 1166STP shielded twisted pair 1167SUS Single Unix Specification 1168SUT system under test 1169SVG scalable vector graphics 1170SVGA Super Video Graphics Array 1171SVM secure virtual machine 1172SVM support vector machine 1173SVR System V Release 1174SWF Shockwave Flash 1175SWIG simplified wrapper [and] interface generator 1176SYR symbol timing recovery 1177TA test assertion 1178TA transmitter address 1179TAI international atomic time 1180TAO track at once 1181TAOCP The Art of Computer Programming 1182TAP Test Anything Protocol 1183TAS test and set 1184TB terabyte 1185TCB trace capture buffer 1186TCB trusted computing base 1187TCC thermal control circuit 1188TCL tool command language 1189TCP Transmission Control Protocol 1190TCQ tagged command queueing 1191TDC time [to] digital converter 1192TDD test driven development 1193TDD time division duplex 1194TDM time division multiplexing 1195TDMA time division multiple access 1196TDOA time difference of arrival 1197TDP thermal design {point,power} 1198TECO Text Editor and Corrector 1199TFT thin film transistor 1200TFTP Trivial File Transfer Protocol 1201TIAS try it and see 1202TIFF tagged image file format 1203TITS try it to see 1204TK temporal key 1205TKIP Temporal Key Integrity Protocol 1206TLA top level aggregator 1207TLB translation lookaside buffer 1208TLD top level domain 1209TLS thread local storage 1210TLS transport layer security 1211TM Turing machine 1212TM thermal monitor 1213TMDS transition minimized differential signaling 1214TMO timeout 1215TOD time of day 1216TOS terms of service 1217TOS trusted operating system 1218TOS type of service 1219TP transaction processing 1220TPI tracks per inch 1221TPM transactions per minute 1222TPM trusted platform module 1223TPR task priority register 1224TPS transactions per second 1225TPS transmission parameters signaling 1226TR task register 1227TR token ring 1228TRL timing recovery loop 1229TRNG true random number generator 1230TS terminal services 1231TS time series 1232TS time stamp 1233TS transport stream 1234TSC time stamp counter 1235TSD time stamp disable 1236TSL test, set, lock 1237TSO time sharing option 1238TSP Time-Stamp Protocol 1239TSP Tunnel Setup Protocol 1240TSP time synchronization protocol 1241TSP traveling salesman problem 1242TSS task state segment 1243TTL time to live 1244TTL transistor-transistor logic 1245TTM translation table maps 1246TTY teletype 1247TUI {terminal,text-based,textual} user interface 1248TX {transmit out,transmitter} 1249TZ time zone 1250UAC user {access,account} control 1251UART universal asynchronous receiver/transmitter 1252UAT user acceptance testing 1253UC uncacheable 1254UCS uniform-cost search 1255UDMA ultra DMA 1256UDO ultra density optical 1257UDP User Datagram Protocol 1258UFS Unix File System 1259UI unit interval 1260UI user interface 1261UID unique identifier 1262UID user identifier 1263UL upload 1264UMA uniform memory access 1265UMA upper memory area 1266UMB upper memory block 1267UML unified modeling language 1268UMPC ultra-mobile PC 1269UPNP universal plug and play 1270UPS uninterruptible power supply 1271URI uniform resource identifier 1272URL uniform resource locator 1273URN uniform resource name 1274USART universal synchronous/asynchronous receiver/transmitter 1275USB universal serial bus 1276USWC uncacheable speculative write combining 1277UT unit test 1278UTC coordinated universal time 1279UTP unshielded twisted pair 1280UUCP Unix-to-Unix Copy Protocol 1281UUID universally unique identifier 1282UUOC useless use of cat 1283UUT unit under test 1284UX user experience 1285VA vertical alignment 1286VA virtual address 1287VA volt-ampere 1288VAX virtual address extension 1289VB Visual Basic 1290VCA variable-gain amplifier 1291VCC common collector voltage 1292VCF voltage-controlled filter 1293VCM virtual channel memory 1294VCO voltage-controlled oscillator 1295VCS version control system 1296VESA Video Electronics Standards Association 1297VFO variable-frequency oscillator 1298VG volume group 1299VGA Video Graphics Array 1300VHDCI very high density cable interconnect 1301VID voltage level identifier 1302VIPT virtually indexed, physically tagged 1303VIVT virtually indexed, virtually tagged 1304VLAN virtual local area network 1305VLIW very long instruction word 1306VLSI very large scale integration 1307VLSM variable length subnet mask 1308VM virtual {machine,memory} 1309VME virtual mode extension 1310VMX vector multimedia extensions 1311VMX virtual machine extensions 1312VOD video on demand 1313VPN virtual private network 1314VR virtual reality 1315VRAM video random access memory 1316VRM voltage regulator module 1317VRRP Virtual Router Redundancy Protocol 1318W watt 1319W3C World Wide Web Consortium 1320WAN wide area network 1321WAP Wireless Application Protocol 1322WAP wireless access point 1323WDT watchdog timer 1324WEP Wired Equivalent Privacy 1325WFI wait for interrupt 1326WFQ weighted fair queuing 1327WH write hit 1328WIFI wireless fidelity 1329WLAN wireless local area network 1330WM write miss 1331WMI Windows Management Instrumentation 1332WOL Wake-on-LAN 1333WOM Wake-on-Modem 1334WOR Wake-on-Ring 1335WORM write once read many 1336WP WordPerfect 1337WP word processor 1338WP write protect 1339WPA Wi-Fi Protected Access 1340WPA2 Wi-Fi Protected Access II 1341WPS Wi-Fi Protected Setup 1342WRAM window random access memory 1343WS web services 1344WTC write through caching 1345WWAN wireless wide area network 1346WWW world wide web 1347WYSIWYG what you see is what you get 1348XBAR crossbar 1349XDMCP X Display Manager control protocol 1350XER XML encoding rules 1351XGA Extended Graphics Array 1352XIP execute in place 1353XML Extensible Markup Language 1354XOR exclusive or 1355XP extreme programming 1356XSL extensible stylesheet language 1357XSS cross site scripting 1358XT extended technology 1359XUL XML user interface language 1360YACC yet another compiler compiler 1361YAWPFAPR you are welcome; please file a problem report 1362YP Yellow Pages 1363YTD year to date 1364ZBR zone bit recording 1365ZFOD zero-filled on demand 1366ZIF zero insertion force 1367ZIFS zero insertion force socket 1368ZMA zone multicast address 1369