acronyms.comp revision 1.130
1$NetBSD: acronyms.comp,v 1.130 2012/10/11 18:00:25 ginsbach Exp $ 2 33WHS three-way handshake 48VSB 8-state vestigial side band modulation 5AA anti-aliasing 6AAA authentication, authorization, accounting 7AAT average access time 8ABI application binary interface 9ABR available bit rate 10AC alternating current 11ACI adjacent channel interferer 12ACID atomicity, consistency, isolation, durability 13ACK acknowledgement 14ACK Amsterdam compiler kit 15ACL access control list 16ACL active current loop 17ACP auxillary control {program, process} 18ACPI advanced configuration and power interface 19ACS access control set 20ACU automatic calling unit 21ADB Apple desktop bus 22ADC analog [to] digital converter 23ADD acronym driven development 24ADP automatic data processing 25ADT abstract data type 26ADO active data objects 27ADP automatic data processing 28ADPCM adaptive differential pulse code modulation 29ADS alternate data stream 30ADSL asymmetric digital subscriber line 31AES Advanced Encryption Standard 32AFS Andrew File System 33AGC automatic gain control 34AGP accelerated graphics port 35AI analog input 36AI artificial intelligence 37AL access list 38AL active link 39ALE address latch enable 40ALS ambient light sensor 41ALU arithmetic and logical unit 42AM access method 43AM amplitude modulation 44AM alignment mask 45AMI alternate mark inversion 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 57AQM active queue management 58ARAT always running APIC timer 59ARC adaptive replacement cache 60ARM Advanced RISC Machines 61ARP address resolution protocol 62ARPA Advanced Research Projects Agency 63ARQ automatic repeat request 64ARR address range register 65ARU audio response unit 66AS autonomous system 67ASC advanced smart cache 68ASCII American standard code for information interchange 69ASD agile software development 70ASE advanced software environment 71ASIC application-specific integrated circuit 72ASK amplitude shif keying 73ASLR address space layout randomization 74ASPM active state power management 75ASN autonomous system number 76ASQ automated software quality 77ASR address space register 78AST abstract syntax tree 79AST asynchronous trap 80AT access time 81AT advanced technology 82ATA advanced technology attachment 83ATAPI advanced technology attachment packet interface 84ATC address translation cache 85ATM asynchronous transfer mode 86ATX advanced technology extended 87AV anti virus 88AVL Adelson-Velsky-Landis 89AVX advanced vector extensions 90AWK Aho, Werner, and Kernighan 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 counte 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 112BIND Berkeley Internet Name Daemon 113BIOS basic input/output system 114BIST built-in self-test 115BIU bus interface unit 116BKDG BIOS and kernel developer's guide 117BLAS basic linear algebra subprograms 118BLOB binary large object 119BLC back light control 120BM bus master 121BMC baseboard management controller 122BMIC bus master interface controller 123BN boundary neutral 124BNF Backus-Naur form 125BO binary output 126BOF beginning of file 127BOM byte order mark 128BOM beginning of message 129BP base pointer 130BP boot processor 131BPB BIOS parameter block 132BPF Berkeley packet filter 133BPI bits per inch 134BPM business process modelling 135BPS bits per second 136BPSK binary phase shift keying 137BQS Berkeley quality software 138BRE basic regular expression 139BS binary sequence 140BSD Berkeley software distribution 141BSF bit scan forward 142BSOD blue screen of death 143BSP binary space partition 144BSP bootstrap processor 145BSR bit scan reverse 146BSS block started by symbol 147BT Bluetooth 148BT BitTorrent 149BT bit test 150BTC bit test [and] complement 151BTR bit test [and] reset 152BTS bit test [and] set 153BTS bits per second 154BW bandwidth 155BWM block-write mode 156CA certificate authority 157CAD computer-aided design 158CAM computer assisted manufacturing 159CAM content addressable memory 160CAM conditional access module 161CARP common address redundancy protocol 162CAS (atomic) compare and swap 163CAS computer algebra system 164CAS column address strobe 165CASE computer aided software engineering 166CAU control access unit 167CAV constant angular velocity (as opposed to CLV) 168CBC cipher block chaining 169CBR constant bit rate 170CCD charge coupled device 171CCI co-channel interferer 172CC carbon coby 173CD compact disc 174CD cache disable 175CDDA compact disc digital audio 176CDMA code division multiple access 177CDRAM cache dynamic random access memory 178CER canonical encoding rules 179CF compact flash 180CFG context-free grammar 181CFG control-flow graph 182CG control gate 183CGA color graphics {array,adapter} 184CGI common gateway interface 185CGN carrier grade NAT 186CHAP challenge-handshake authentication protocol 187CHS cylinder/head/sector 188CI {common, component} interface 189CI continuous integration 190CIDR classless inter-domain routing 191CIFS common internet file system 192CIL common intermediate language 193CIR carrier to interference ratio 194CIS contact image sensor 195CJK Chinese, Japanese, and Korean 196CLF common log format 197CLI command line interface 198CLR common language runtime 199CLTT closed loop thermal throttling 200CLUT color look-up table 201CLV constant linear velocity (as opposed to CAV) 202CM configuration management 203CMA concert multithread architecture 204CMI control management interface 205CMI control method interface 206CMOS complementary metal-oxide-semiconductor 207CMP chip multi-processing 208CMS content management system 209CMYK cyan magenta yellow black 210CN {common, canonical} name 211CNC computer numerical control 212CNR carrier to noise ratio 213COF current operating frequency 214COFDM coded orthogonal frequency division multiplexing 215COFF common object file format 216COM component object model 217COMA cache-only memory architecture 218CORBA common object request broker architecture 219COW copy-on-write 220CP continuous pilot 221CPB core performance boost 222CPE common phase error 223CPG clock pulse generator 224CPL current privilege level 225CPLD complex programmable logic device 226CPS characters per second 227CPT command pass through 228CPU central processing unit 229CR carriage return 230CRC cyclic redundancy check 231CRL carrier recovery loop 232CRLF carriage return line feed 233CRT cathode ray tube 234CS computer science 235CS cable select 236CS chip select 237CS code segment 238CSI common system interface 239CSI channel state information 240CSMA carrier sense multiple access 241CSMA/CA carrier sense multiple access with collision avoidance 242CSMA/CD carrier sense multiple access with collision detection 243CSR control [and] status registers 244CSS cascading style sheets 245CSV comma-separated values 246CTM close to metal 247CTS clear to send 248CUA common user access 249CUT coordinated universal time 250CV control voltage 251CVS concurrent versions system 252DA destination address 253DAA distributed application architecture 254DAB digital audio broadcasting 255DAC discretionary access control 256DAC digital [to] analog converter 257DAO disk at once 258DAP directory access protocol 259DAT digital audio tape 260DAT dynamic acceleration technology 261DB database 262DBA dynamic bandwidth allocation 263DBB data bus buffer 264DBC design by contract 265DBL dynamic buffer limiting 266DBMS database management system 267DBS database server 268DC direct current 269DCC direct client [to] client 270DCC direct cable connect 271DCD data carrier detect 272DCE data control equipment 273DCE distributed computing environment 274DCOM distributed component object model 275DCOP desktop communication protocol 276DCS data collection systems 277DCT discrete cosine transform 278DCU data cache unit 279DDC display data channel 280DDE dynamic data exchange 281DDK device driver kit 282DDL data description language 283DDR double data rate 284DDS direct digital sound 285DDWG digital display working group 286DE desktop environment 287DE debugging extensions 288DEA data encryption algorithm 289DEK data encryption key 290DEP data execution prevention 291DER distinguished encoding rules 292DES Data Encryption Standard 293DF don't fragment 294DFA deterministic finite automaton 295DFC data flow control 296DFS depth first search 297DFS distributed file system 298DFT discrete Fourier transform 299DFT diagnostic function test 300DGL data generation language 301DH Diffie-Hellman 302DHCP dynamic host configuration protocol 303DIFS distributed inter-frame space 304DIMM dual inline memory module 305DIRT design in real time 306DL download 307DL diode logic 308DLE data link escape 309DLL dynamic link library 310DMA direct memory access 311DMI desktop management interface 312DMS document management system 313DMT discrete multitone modulation 314DNARD Digital network appliance reference design 315DNS domain name system 316DOE distributed object environment 317DOF data over fibre 318DOM document object model 319DOS denial of service 320DOS disk operating system 321DPC deferred procedure call 322DPCM differential pulse code modulation 323DPD dead peer detection 324DPI dots per inch 325DPI deep packet inspection 326DPL descriptor privilege level 327DPST display power savings technology 328DRAM dynamic random access memory 329DRI direct rendering infrastructure 330DRM digital rights management 331DRRS display refresh rate switching 332DS debug store 333DSB double-sideband modulation 334DSDT differentiated system descriptor table 335DSL digital subscriber line 336DSL domain specific language 337DSLAM digital subscriber line access multiplexer 338DSN delivery status notification 339DSO dynamic shared object 340DSP digital signal processor 341DSSS direct sequence spread spectrum 342DTD document type definition 343DTE data terminal equipment 344DTE dumb terminal emulator 345DTL diode-transistor logic 346DTS digital thermal sensor 347DUT device under test 348DVB digital video broadcasting 349DVCS distributed version control system 350DVD digital versatile disc 351DVFS dynamic voltage and frequency scaling 352DVR digital video recorder 353DVI digital visual interface 354E-XER extended XML encoding rules 355EABI embedded-application binary interface 356EAP extensible authentication protocol 357EBR extended boot record 358ECC error correction code 359ECL emitter-coupled logic 360ECN explicit congestion notification 361ECP enhanced capability port 362ECS enhanced chip set 363ECS extended configuration space 364EDAT enhanced dynamic acceleration technology 365EDGE explicit data graph execution 366EDID extended display identification data 367EDO extended data out 368EDS electronical data sheet 369EEPROM electrically erasable programmable read only memory 370EFI extensible firmware interface 371EFL emitter follower logic 372EFM eight to fourteen modulation 373EGA enhanced graphics {array,adapter} 374EGP exterior gateway protocol 375EH extension header 376EIDE enchanced IDE 377EISA extended industry standard architecture 378ELF executable and linking format 379ELS entry level system 380EMI electro-magnetic interference 381EMP electro-magnetic pulse 382EMR electro-magnetic radiation 383EOF end of file 384EOI end of interrupt 385EOL end of line 386EOL end of life 387EOT end of transmission 388EPIC explicitly parallel instruction computing 389EPP enhanced parallel port 390EPRML extended partial response, maximum likelihood 391EPROM erasable programmable read only memory 392ERD emergency recovery disk 393ERE extended regular expression 394ESDRAM enhanced synchronous dynamic random access memory 395ESS electronic switching system 396EST enhanced speedstep 397ETL extract, transform, load 398EU execution unit 399EULA end user license agreement 400FAT file allocation table 401FBRAM frame buffer random access memory 402FCL fiber channel loop 403FCFS first come, first served 404FCS frame check sequence 405FDC floppy disk controller 406FDD floppy disk drive 407FDDI fiber distributed data interface 408FDE full disk encryption 409FEA finite element analysis 410FEC forward error correction 411FET field-effect transistor 412FFH functional fixed hardware 413FFI foreign function interface 414FFM focus follows mouse 415FFS fast file system 416FFS find first set 417FFT fast Fourier transform 418FG floating gate 419FHSS frequency hop spread spectrum 420FID frequency identifier 421FIFO first in, first out 422FILO first in, last out 423FIR fast infrared 424FLOPS floating [point] operations per second 425FLOSS free / libre / open source software 426FM frequency modulation 427FMR false match rate 428FOSS free / open source software 429FPGA field programmable gate array 430FPM fast page mode 431FPR floating point register 432FPU floating point unit 433FQDN fully qualified domain name 434FRR false rejection rate 435FRU field replaceable unit 436FS file system 437FSB front side bus 438FSCK file system check 439FSK frequency shift keying 440FSM finite-state machine 441FTA fault tree analysis 442FTP file transfer protocol 443FTPS file transfer protocol, secure 444FUS fast user switching 445FWH firmware hub 446FWS folding white space 447GAL generic array logic 448GAS generic address structure 449GC garbage collector 450GCR group-coded recording 451GDT global descriptor table 452GEM graphics execution manager 453GEM graphics environment manager 454GENA general event notification architecture 455GHC Glasgow Haskell compiler 456GID group identifier 457GIF graphics interchange format 458GMCH graphics and memory controller hub 459GNU GNU's not Unix 460GOT global offset table 461GPE general purpose event 462GPF general protection fault 463GPL GNU/general public license 464GPR general purpose register 465GPS generalized processor sharing 466GPT GUID partition table 467GPU graphics processing unit 468GR golden ratio 469GRE generic routing encapsulation 470GSI global system interrupt 471GUI graphics user interface 472GUID globally unique identifier 473HA high availability 474HAL hardware abstraction layer 475HAT hashed array tree 476HBA host bus adapter 477HCI host controller interface 478HCI human-computer interaction 479HCL hardware compatibility list 480HCF halt and catch fire 481HDD hard disk drive 482HDCP high-bandwidth digital content protection 483HDL hardware description language 484HDTV high-definition television 485HF high frequency 486HFM highest frequency mode 487HID human interface device 488HLL high-level language 489HMA high memory area 490HMI human-machine interface 491HP Hewlett-Packard 492HOOD hierarchical object oriented design 493HPC high performance computing 494HPET high precision event timer 495HT hyper-threading 496HTC hardware thermal control 497HTCC high temperature co-fired ceramic 498HTML hyper-text markup language 499HTT hyper-threading technology 500HTTP hyper-text transfer protocol 501HTTPS hyper-text transfer protocol, secure 502HVM hardware virtual machine 503HZ Hertz 504I2O intelligent input/output 505IA information assurance 506IANA Internet assigned numbers authority 507IBC iterated block cipher 508IBM International Business Machines 509IBS instruction based sampling 510ICA independent computer architecture 511IC integrated circuit 512ICB Internet citizen's band 513ICE in-circuit emulator 514ICH I/O controller hub 515ICE internal compiler error 516ICE in-circuit emulator 517ICMP Internet control message protocol 518ICT information and communications technology 519ICW initialization command word 520IDA Intel dynamic acceleration 521IDE integrated drive electronics 522IDE integrated development environment 523IDPS intrusion detection [and] prevention system 524IDRP inter-domain routing protocol 525IDS intrusion detection system 526IDT interrupt descriptor table 527IE Internet Explorer 528IEC international electrotechnical commission 529IEEE Institute [of] Electrical [and] Electronics Engineers 530IESG Internet Engineering Steering Group 531IETF Internet Engineering Task Force 532IF intermediate frequency 533IFCM isochronous flow control mode 534IGD Internet gateway device 535IGMP Internet group management protocol 536IGP interior gateway protocol 537IHV independent hardware vendor 538IKE Internet key exchange 539ILM internal loopback mode 540ILP instruction level parallelism 541IM instant messaging 542IMC integrated memory controller 543IMCR interrupt mode configuration register 544IMAP Internet mail access protocol 545IMR interrupt mask register 546IMS information management system 547INCITS international committee on information technology standards 548IO input/output 549IOCTL input/output control 550IOMMU input/output memory management unit 551IP Internet Protocol 552IP intellectual property 553IPC interprocess communication 554IPE integrated programming environment 555IPI interprocessor interrupt 556IPNG Internet protocol, next generation 557IPS intrusion prevention system 558IPS in-plane switching 559IPSEC Internet protocol security 560IRC Internet relay chat 561IRDA infrared data association 562IRQ interrupt request 563IRQL interrupt request level 564IRR interrupt request register 565IRTF Internet research task force 566IS information system 567ISA industry standard architecture 568ISA instruction set architecture 569ISDN integrated services digital network 570ISI inter-symbol interference 571ISM industrial, scientific and medical 572ISN initial serial number 573ISO international standards organization 574ISOC Internet society 575ISP Internet service provider 576ISR interrupt service routine 577ISR in-service register 578IST interrupt stack table 579ISV independent software vendor 580IT information technology 581ITB Intel turbo boost 582IV initialization vector 583IVT interrupt vector table 584JBOD just a bunch of disks 585JFET junction [gate] field-effect transistor 586JIT just in time 587JPEG joint photographic experts group 588JRE Java runtime environment 589JTAG joint test action group 590KB keyboard 591KB kilobyte 592KBD keyboard 593KBD kilobaud 594KLOC thousand lines of code 595KMS kernel-mode setting 596KPI kernel programming interface 597KVA kernel virtual address 598KVM kernel virtual memory 599KVM keyboard, video, mouse switch 600LAMP Linux Apache MySQL {Perl,PHP,Python} 601LAN local area network 602LAPIC local advanced programmable interrupt controller 603LAR load access rights 604LBA logical block addressing 605LBS location-based service 606LCD liquid crystal display 607LCP link control protocol 608LDA local delivery agent 609LDAP lightweight directory access protocol 610LDR light-dependent resistor 611LDT local descriptor table 612LE logical extent 613LED light emitting diode 614LER label edge router 615LF line feed 616LF low frequency 617LFM lowest frequency mode 618LFN long file names 619LFO low-frequency oscillation 620LFS log-structured file system 621LFU least frequently used 622LHP loop heat pipe 623LIFO last in, first out 624LILO last in, last out 625LILO Linux loader 626LINT local interrupt 627LIR local Internet registry 628LKM {Linux, loadable} kernel module 629LKML Linux kernel mailing list 630LL load linked 631LL/SC load linked / store conditional 632LLC logical link control 633LLF low level format 634LLMNR link-local multicast name resolution 635LLVM Low Level Virtual Machine 636LM long mode 637LMM link management mode 638LNO loop nest optimization 639LOC lines of code 640LPC low pin count 641LPS local positioning system 642LRC longitudinal redundancy check 643LRM left-to-right mark 644LRO left-to-right override 645LRU least recently used 646LSB least significant bit [or: byte] 647LSB Linux standards base 648LSI large scale integration 649LSL load segment limit 650LSN large scale NAT 651LSR label switch router 652LTCC low temperature co-fired ceramic 653LTR left to right 654LTR load task register 655LUN logical unit number 656LV logical volume 657LVM logical volume management 658LVT local vector table 659LWP light-weight process 660LZW Lempel Ziv Welch 661MAC medium access control 662MAC mandatory access control 663MADT multiple APIC descriptor table 664MB megabyte 665MBR master boot record 666MBS megabits per second 667MC memory controller 668MCA machine check architecture 669MCC multiversion concurrency control 670MCE machine check exception 671MCGA multicolor graphics adapter 672MCH memory controller hub 673MCM multi-chip module 674MCQ memory controlled queue 675MD machine-dependent 676MDA mail delivery agent 677MDA monochrome display adapter 678MDRAM multibank dynamic random access memory 679MESI modified, exclusive, shared, invalid 680MFC merge from current 681MFM modified frequency modulation 682MI machine-independent 683MIB management information base 684MID mobile internet device 685MIDI musical instrument digital interface 686MIF management information format 687MIMD multiple instruction stream, multiple data stream 688MIME multipurpose Internet mail extensions 689MIMO multiple input multiple output 690MIPS million instructions per second 691MISD multiple instruction, single data 692MIT Massachusetts Institute of Technology 693ML mailing list 694ML machine language 695ML machine learning 696ML markup language 697ML maximum likelihood 698MLC multi-level cell 699MLHP micro loop heat pipe 700MMIC monolithic microwave integrated circuit 701MMIO memory mapped input/output 702MMU memory management unit 703MMX multimedia extension 704MMX multiple math extension 705MMX matrix math extension 706MO magneto-optical 707MOESI modified, owned, exclusive, shared, invalid 708MOF maximum operating frequency 709MOSFET metal-oxide-semiconductor field-effect transistor 710MOSI modified, owned, shared, invalid 711MP multiprocessor 712MP multiprocessing 713MP multi-platform 714MP multiplayer 715MPEG moving picture experts group 716MPI message passing interface 717MPLS multiprotocol label switching 718MPP massively parallel processor 719MPS multiprocessor specification 720MPS memory pool system 721MR modem ready 722MRU most recently used 723MS Microsoft 724MSB most significant bit [or: byte] 725MSE mean square error 726MSF minutes seconds frames 727MSI message signaled interrupt 728MSI modified, shared, invalid 729MSR machine state register 730MSS maximum segment size 731MT machine translation 732MTA mail transfer agent 733MTBF mean time between failures 734MTRR memory type range register 735MTTF mean time to failure 736MTU maximum transmission unit 737MUA mail user agent 738MUD multi-user domain 739MVCC multiversion concurrency control 740MWE module width encoding 741MX mail exchange 742NACK negative acknowledgement 743NAN not a number 744NAPT network address [and] port translation 745NAS network attached storage 746NAT network address translation 747NAV network allocation vector 748NC numerical control 749NCO numerically-controlled oscillator 750NCP network control protocol 751NCQ native command queuing 752ND neighbor discovery 753NE numeric error 754NFA nondeterministic finite automaton 755NFS network file system 756NIA next instruction address 757NIC network interface card 758NIP network interface protocol 759NIS network information service 760NLS native language support 761NMI non-maskable interrupt 762NNTP network news transfer protocol 763NOP no operation 764NP nondeterministic polynomial time 765NRZ non-return to zero 766NSA National Security Agency 767NTM non-deterministic Turing machine 768NTP network time protocol 769NUMA non-uniform memory access 770NVRAM non-volatile random access memory 771NW not write-through 772NX no execute 773OAEP optimal asymmetric encryption padding 774OBO off by one 775OBOE off by one error 776OCL object constraint language 777OCR optical character recognition 778ODCM on-demand clock modulation 779ODT on-die termination 780OEM original equipment manufacturer 781OFDM orthogonal frequency division multiplexing 782OFET organic field-effect transistor 783OLE object linking and embedding 784ONFI open nand flash interface 785OO object oriented 786OO OpenOffice 787OOB out of band 788OOE out of order execution 789OOM out of memory 790OOP object oriented programming 791OOSE object oriented software engineering 792OPS operations per second 793OPM operations per minute 794OQL object query language 795ORM object-relational mapping 796OS operating system 797OSD open source definition 798OSF open software foundation 799OSI open systems interconnection 800OSI open-source initiative 801OSPF open shortest path first 802OSPM OS power management 803OSS open source software 804OSS open sound system 805OSVW operating system visible workarounds 806OTP one time password 807OU organizational unit 808OUI organizationally unique identifier 809OWL Web ontology language 810P2P peer to peer 811P2P PCI to PCI 812PA physical address 813PA phase accumulator 814PAC phase-amplitude converter 815PAE physical address extension 816PAL programmable array logic 817PAL phase alternating line 818PAM pluggable authentication modules 819PAM pulse amplitude modulation 820PAP password authentication protocol 821PAT page attribute table 822PAT port address translation 823PATA parallel ATA 824PAX portable archive exchange 825PBE pending break encoding 826PBE programming by example 827PC personal computer 828PC program counter 829PCB printed circuit board 830PCC Portable C Compiler 831PCD page-level cache disable 832PCE performance-monitor counter enable 833PCI peripheral component interconnect 834PCM phase change memory 835PCM pulse code modulation 836PCMCIA personal computer memory card international association 837PD public domain 838PDA personal digital assistant 839PDA pushdown automaton 840PDAG propositional directed acyclic graph 841PDB power distribution board 842PDF portable document format 843PDM pulse-duration modulation 844PDN pull-down network 845PDP page descriptor page 846PDS product data sheet 847PDU protocol data unit 848PE protection enable 849PECI platform environment control interface 850PEP protocol extension protocol 851PER packed encoding rules 852PERL practical extraction [and] report language 853PFS perfect forward secrecy 854PGAS partitioned global address space 855PGE page global enable 856PGP pretty good privacy 857PHB PCI host bridge 858PIC programmable interrupt controller 859PIC position independent code 860PID process id 861PIE position independent executable 862PIM personal information manager 863PIM platform-independent model 864PIN personal identification number 865PIO programmed input/output 866PIPT physically indexed, physically tagged 867PIQ prefetch input queue 868PIT programmable interrupt timer 869PIV personal identity verification 870PKI public key infrastructure 871PKCS public-key cryptography standards 872PLC programmable logic controller 873PLD programmable logic device 874PLL phase locked loop 875PLRU pseudo LRU 876PLTM package level thermal management 877PM power management 878PM {phase, pulse} modulation 879PME power management event 880PMI platform management interrupt 881PMIO port-mapped input/output 882PMT photo-multiplier tube 883PMU power management unit 884PNG portable network graphics 885PNP plug and play 886POE power over ethernet 887POF probability of failure 888POP post office protocol 889POP power on password 890POSIX portable operating system interface [for] Unix 891POST power on self test 892POTS plain old telephone system 893PP pair programming 894PPC PowerPC 895PPB PCI [to] PCI bridge 896PPI pixels per inch 897PPM pages per minute 898PPP point-to-point protocol 899PPPOA point-to-point protocol over ATM 900PPPOE point-to-point protocol over ethernet 901PPU physics processing unit 902PRBS pseudo-random bit sequence 903PRML partial response, maximum likelihood 904PRN pseudo random {number, noise} 905PRNG pseudo random number generator 906PROM programmable read only memory 907PSD power spectral density 908PSE page size extensions 909PSK pre-shared key 910PSK phase shift keying 911PSTN public switched telephone network 912PSW program status word 913PTE page table entry 914PTLA pseudo top level aggregator 915PTP page table page 916PTV perceived target value 917PU processing unit 918PUN physical unit number 919PV physical volume 920PVG physical volume group 921PVI protected-mode virtual interrupt 922PWM pulse width modulation 923PXE preboot execution environment 924QA quality assurance 925QAM quality assurance management 926QAM quadrature amplitude modulation 927QBE query by example 928QC quality control 929QDI quasi delay insensitive 930QOS quality of service 931RA receiver address 932RA remote assistance 933RA router advertisement 934RA resource affinity 935RAD rapid application development 936RAID redundant array of inexpensive disks 937RAM random access memory 938RAS restartable atomic sequence 939RAS remote access service 940RAS row address strobe 941RBF radial basis function 942RBT red-black tree 943RC release candidate 944RC remote control 945RCS revision control system 946RCU read, copy, update 947RDF resource description format 948RDM relational data model 949RDMA remote direct memory access 950RE regular expression 951REST representational state transfer 952RF radio frequency 953RFI radio frequency interference 954RFO request for ownership 955RGB red green blue 956RH read hit 957RHL Red Hat Linux 958RIB routing information base 959RIFF Resource Interchange File Format 960RIP routing information protocol 961RIR regional Internet registry 962RISC reduced instruction set computing 963RKM ROM Kernel Manual 964RLE run length encoding 965RLL run length limited 966RLO right-to-left override 967RM read miss 968RMI remote method invocation 969RMPM rapid memory power management 970RMS root mean square 971RMW read, modify, write 972RNG random number generator 973ROM read only memory 974RPC remote procedure call 975RPL requested privilege level 976RPM revolutions per minute 977RR round robin 978RR random replacement 979RS relay station 980RSA Rivest, Shamir and Adleman 981RSIP realm specific Internet Protocol 982RSS really simple syndication 983RSS residual sum of squares 984RT real time 985RTC real time clock 986RTC real time computing 987RTF rich text format 988RTL resistor-transistor logic 989RTOS real time operating system 990RTS {ready, request} to send 991RTT round time trip 992RUP rational unified process 993RWM read-write memory 994RX receive, receiver 995S/PDIF Sony/Phillips digital interface 996SA security advisory 997SA security association 998SA source address 999SA structured analysis 1000SAAS software as a service 1001SACD super audio compact disc 1002SAD security association database 1003SAL system abstraction layer 1004SAM serial access memory 1005SAM sum addressed memory 1006SAN storage area network 1007SAPIC streamlined advanced programmable interrupt controller 1008SASD structured analysis, structured design 1009SASI shugart associates system interface (predecessor to SCSI) 1010SASL simple authentication [and] security layer 1011SATA serial advanced technology attachment 1012SB sound blaster 1013SBU standard build unit 1014SC store conditional 1015SCA source code analyzer 1016SCADA supervisory control and data acquisition 1017SCC single chip cloud 1018SCC source code control 1019SCCS source code control system 1020SCM software configuration management 1021SCM source code management 1022SCP secure copy 1023SCI system control interrupt 1024SCI scalable coherent interface 1025SCSI small computer system interface 1026SCTP stream control transmission protocol 1027SDI symbol deinterleave 1028SDK software development kit 1029SDL simple declarative language 1030SDRAM synchronous dynamic random access memory 1031SDT syntax-directed translation 1032SEGV segmentation violation 1033SFI simple firmware interface 1034SFC sequential function chart 1035SGRAM synchronous graphics random access memory 1036SIFS short inter-frame space 1037SIMD single instruction, multiple data 1038SIMM single inline memory module 1039SIP session initiation protocol 1040SIR slow infrared 1041SISD single instruction, single data 1042SLC single-level cell 1043SLDRAM synchronous-link dynamic random access memory 1044SLI scalable link interface 1045SLI scan-line interleave 1046SLOC source lines of code 1047SLRU segmented LRU 1048SMA smart memory access 1049SMAF system management action field 1050SMART self-monitoring analysis and reporting technology 1051SMBIOS system management BIOS 1052SMC system management controller 1053SMI system management interrupt 1054SMI structure of management information 1055SMM system management mode 1056SMP symmetric multiprocessing 1057SMT simultaneous multithreading 1058SMTP simple mail transfer protocol 1059SMU system management unit 1060SNMP simple network management protocol 1061SNR signal [to] noise ratio 1062SOA service oriented architecture 1063SOAP simple object access protocol 1064SOC system on chip 1065SOF start of frame 1066SOHO small office / home office 1067SOL serial over LAN 1068SP stack pointer 1069SP service pack 1070SPARC scalable processor architecture 1071SPARQL SPARQL protocol and RDF query language 1072SPD security policy database 1073SPD serial presence detect 1074SPI serial peripheral interface 1075SPI stateful packet inspection 1076SPMD single process, multiple data 1077SPR special purpose register 1078SPT sectors per track 1079SQA software quality assurance 1080SQL structured query language 1081SRAM static random access memory 1082SRC sample rate conversion 1083SS stack segment 1084SS self-snoop 1085SSB single-sideband modulation 1086SSD solid state drive 1087SSE streaming SIMD extensions 1088SSFDC solid state floppy disc card 1089SSH secure shell 1090SSI server side includes 1091SSL secure sockets layer 1092SSP stack smashing protection 1093STC software thermal control 1094STD state transition diagram 1095STP shielded twisted pair 1096STP spanning-tree protocol 1097SUS Single Unix Specification 1098SUT system under test 1099SVG scalable vector graphics 1100SVGA super video graphics {array,adapter} 1101SVM secure virtual machine 1102SVM support vector machine 1103SVR System V Release 1104SWF Shockwave Flash 1105SWIG simplified wrapper [and] interface generator 1106SYR symbol timing recovery 1107TA transmitter address 1108TA test assertion 1109TAI international atomic time 1110TAO track at once 1111TAOCP The Art of Computer Programming 1112TAP test anywhere protocol 1113TAS test and set 1114TB terabyte 1115TCB trace capture buffer 1116TCB trusted computing base 1117TCC thermal control circuit 1118TCL tool command language 1119TCP transmission control protocol 1120TCQ tagged command queueing 1121TDC time [to] digital converter 1122TDD test driven development 1123TDD time division duplex 1124TDM time division multiplexing 1125TDMA time division multiple access 1126TDOA time difference of arrival 1127TDP thermal design {point, power} 1128TECO Text Editor and Corrector 1129TFT thin film transistor 1130TFTP trivial file transfer protocol 1131TIAS try it and see 1132TIFF tagged image file format 1133TITS try it to see 1134TK temporal key 1135TLA top level aggregator 1136TLB transition lookaside buffer 1137TLD top level domain 1138TLS transport layer security 1139TLS thread local storage 1140TM Turing machine 1141TM thermal monitor 1142TMDS transition minimized differential signaling 1143TMO timeout 1144TOD time of day 1145TOS terms of service 1146TOS type of service 1147TOS trusted operating system 1148TP transaction processing 1149TPM trusted platform module 1150TPM transactions per minute 1151TPR task priority register 1152TPS transmission parameters signaling 1153TR token ring 1154TR task register 1155TRL timing recovery loop 1156TRNG true random number generator 1157TS time stamp 1158TS time series 1159TS transport stream 1160TS terminal services 1161TSC time stamp counter 1162TSD time stamp disable 1163TSL test, set, lock 1164TSO time sharing option 1165TSP time stamp protocol 1166TSP time synchronization protocol 1167TSP tunnel setup protocol 1168TSP traveling salesman problem 1169TSS task state segment 1170TTL time to live 1171TTL transistor-transistor logic 1172TTM translation table maps 1173TTY teletype 1174TX transmit out, transmitter 1175TZ time zone 1176UAC user {account, access} control 1177UART universal asynchronous receiver/transmitter 1178UAT user acceptance testing 1179UC uncacheable 1180UCS uniform-cost search 1181UDMA ultra DMA 1182UDO ultra density optical (storage) 1183UDP user datagram protocol 1184UFS Unix file system 1185UI user interface 1186UI unit interval 1187UID user identifier 1188UID unique identifier 1189UL upload 1190UMA uniform memory access 1191UMA upper memory area 1192UMB upper memory block 1193UMPC ultra-mobile PC 1194UML unified modeling language 1195UPNP universal plug and play 1196UPS uninterruptible power supply 1197URI uniform resource identifier 1198URL uniform resource locator 1199URN uniform resource name 1200USART universal synchronous/asynchronous receiver/transmitter 1201USB universal serial bus 1202USWC uncacheable speculative write combining 1203UT unit test 1204UTC coordinated universal time 1205UTP unshielded twisted pair 1206UUCP Unix-to-Unix copy protocol 1207UUID universally unique identifier 1208UUOC useless use of cat 1209UUT unit under test 1210UX user experience 1211VA volt-ampere 1212VA virtual address 1213VA vertical alignment 1214VAX virtual address extension 1215VB Visual Basic 1216VCA variable-gain amplifier 1217VCC common collector voltage 1218VCF voltage-controlled filter 1219VCM virtual channel memory 1220VCO voltage-controlled oscillator 1221VCS version control system 1222VESA video electronics standards association 1223VFO variable-frequency oscillator 1224VG volume group 1225VGA video graphics {array,adapter} 1226VHDCI very high density cable interconnect 1227VID voltage level identifier 1228VIPT virtually indexed, physically tagged 1229VIVT virtually indexed, virtually tagged 1230VLAN virtual local area network 1231VLIW very long instruction word 1232VLSI very large scale integration 1233VLSM variable length subnet mask 1234VOD video on demand 1235VM virtual {machine,memory} 1236VME virtual mode extension 1237VMX virtual machine extensions 1238VMX vector multimedia extensions 1239VPN virtual private network 1240VR virtual reality 1241VRAM video random access memory 1242VRM voltage regulator module 1243VRRP virtual router redundancy protocol 1244W Watt 1245W3C World Wide Web Consortium 1246WAN wide area network 1247WAP wireless application protocol 1248WEP wired equivalent privacy 1249WFI wait for interrupt 1250WFQ weighted fair queuing 1251WH write hit 1252WIFI wireless fidelity 1253WLAN wireless local area network 1254WDT watchdog timer 1255WM write miss 1256WMI Windows management instrumentation 1257WOL wake on LAN 1258WOR wake on ring 1259WORM write once read many 1260WP write protect 1261WP word processor 1262WP WordPerfect 1263WPA wi-fi protected access 1264WRAM window random access memory 1265WS web services 1266WTC write through caching 1267WWAN wireless wide area network 1268WWW world wide web 1269WYSIWYG what you see is what you get 1270XBAR crossbar 1271XER XML encoding rules 1272XGA extended graphics {array,adapter} 1273XIP execute in place 1274XML extensible markup language 1275XOR exclusive or 1276XP extreme programming 1277XSL extensible stylesheet language 1278XSS cross site scripting 1279XT extended technology 1280XUL XML user interface language 1281YACC yet another compiler compiler 1282YAWPFAPR you are welcome; please file a problem report 1283YP yellow pages (aka NIS) 1284YTD year to date 1285ZBR zone bit recording 1286ZFOD zero-filled on demand 1287ZIF zero insertion force 1288ZIFS zero insertion force socket 1289ZMA zone multicast address 1290