acronyms.comp revision 1.194
1$NetBSD: acronyms.comp,v 1.194 2018/05/11 14:39:25 sevan Exp $ 23WHS three-way handshake 38VSB 8-state vestigial side band modulation 4AA anti-aliasing 5AAA authentication, authorization, [and] accounting 6AAT average access time 7ABI application binary interface 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 45AMP asymmetric multiprocessing 46AMQP advanced message queuing protocol 47AMT active management technology 48AN Arabic number 49ANR application not responding 50ANSI American National Standards Institute 51AO analog output 52AOL Alert-on-LAN 53AOS add or subtract 54AP access point 55AP application processor 56API application programming interface 57APIC advanced programmable interrupt controller 58APIPA automatic private IP addressing 59APT advanced persistent threat 60AQM active queue management 61ARAT always running APIC timer 62ARC adaptive replacement cache 63ARC automatic reference counting 64ARM Advanced RISC Machines 65ARP Address Resolution Protocol 66ARPA Advanced Research Projects Agency 67ARQ automatic repeat request 68ARR address range register 69ARU audio response unit 70AS autonomous system 71ASC advanced smart cache 72ASCII American Standard Code for Information Interchange 73ASD agile software development 74ASE advanced software environment 75ASIC application-specific integrated circuit 76ASK amplitude shif keying 77ASLR address space layout randomization 78ASN autonomous system number 79ASPM active state power management 80ASQ automated software quality 81ASR address space register 82AST abstract syntax tree 83AST asynchronous trap 84AT access time 85AT advanced technology 86ATA advanced technology attachment 87ATAPI advanced technology attachment packet interface 88ATC address translation cache 89ATM asynchronous transfer mode 90ATX advanced technology extended 91AV anti virus 92AVL Adelson-Velsky-Landis 93AVX advanced vector extensions 94BA byte align 95BAL basic assembly language 96BAR base address register 97BBS bulletin board system 98BCC blind carbon copy 99BCD binary coded decimal 100BCR byte count register 101BCS base configuration space 102BD baud 103BDD binary decision diagram 104BDI bit deinterleave 105BDUF big design up front 106BEDO burst extended data output 107BER basic encoding rules 108BER bit error {rate,ratio} 109BFD binary {file,format} descriptor 110BFKL big fscking kernel lock 111BFS breadth-first search 112BFT binary file transfer 113BGA ball grid array 114BGP Border Gateway Protocol 115BGPSEC BGP Security 116BIND Berkeley Internet Name Daemon 117BIOS Basic Input/Output System 118BIOS built-in operating system 119BIST built-in self-test 120BIU bus interface unit 121BKDG BIOS and kernel developer's guide 122BLAS basic linear algebra subprograms 123BLC back light control 124BLOB binary large object 125BM bus master 126BMC baseboard management controller 127BMIC bus master interface controller 128BN boundary neutral 129BNF Backus-Naur form 130BO binary output 131BOF beginning of file 132BOM beginning of message 133BOM byte order mark 134BP base pointer 135BP boot processor 136BPB BIOS parameter block 137BPDU bridge protocol data unit 138BPF Berkeley Packet Filter 139BPI bits per inch 140BPM business process modelling 141BPS bits per second 142BPSK binary phase shift keying 143BQS Berkeley quality software 144BRE basic regular expression 145BS backspace 146BS binary sequence 147BSA basic service area 148BSD Berkeley Software Distribution 149BSF bit scan forward 150BSOD blue screen of death 151BSP binary space partition 152BSP board support package 153BSP bootstrap processor 154BSR bit scan reverse 155BSS basic service set 156BSS block started by symbol 157BSSID basic service set identifier 158BT BitTorrent 159BT Bluetooth 160BT bit test 161BTC bit test [and] complement 162BTR bit test [and] reset 163BTS bit test [and] set 164BTS bug tracking system 165BW bandwidth 166BWM block-write mode 167CA certificate authority 168CAD computer-aided design 169CAM computer assisted manufacturing 170CAM conditional access module 171CAM content addressable memory 172CARP Common Address Redundancy Protocol 173CAS column address strobe 174CAS compare and swap 175CAS computer algebra system 176CASE computer aided software engineering 177CAU control access unit 178CAV constant angular velocity 179CBC cipher block chaining 180CBR constant bit rate 181CC carbon coby 182CCD charge coupled device 183CCI co-channel interferer 184CCNUMA cache-coherent non-uniform memory access 185CD cache disable 186CD compact disc 187CDDA compact disc digital audio 188CDMA code division multiple access 189CDP Cisco Discovery Protocol 190CDRAM cache dynamic random access memory 191CER canonical encoding rules 192CF compact flash 193CFB cipher feedback 194CFG context-free grammar 195CFG control-flow graph 196CG control gate 197CGA Color Graphics Adapter 198CGI common gateway interface 199CGN Carrier-Grade NAT 200CHAP Challenge-Handshake Authentication Protocol 201CHS cylinder/head/sector 202CI continuous integration 203CI {common,component} interface 204CIDR Classless Inter-Domain Routing 205CIFS Common Internet File System 206CIL common intermediate language 207CIR carrier-to-interference ratio 208CIS contact image sensor 209CISC complex instruction set {computer,computing} 210CJK Chinese, Japanese, [and] Korean 211CLF common log format 212CLI command line interface 213CLR common language runtime 214CLTT closed loop thermal throttling 215CLUT color look-up table 216CLV constant linear velocity 217CM configuration management 218CMA concert multithread architecture 219CMS {configuration,content,course} management system 220CMI control {management,method} interface 221CMOS complementary metal-oxide-semiconductor 222CMP chip multi-processing 223CMS content management system 224CMYK cyan magenta yellow black 225CN {common,canonical} name 226CNC computer numerical control 227CNR carrier-to-noise ratio 228COF current operating frequency 229COFDM coded orthogonal frequency division multiplexing 230COFF common object file format 231COM component object model 232COMA cache-only memory architecture 233CORBA common object request broker architecture 234COW copy-on-write 235CP continuous pilot 236CPB core performance boost 237CPE common phase error 238CPG clock pulse generator 239CPL current privilege level 240CPLD complex programmable logic device 241CPP C preprocessor 242CPS characters per second 243CPT command pass through 244CPU central processing unit 245CR carriage return 246CRC cyclic redundancy check 247CRL carrier recovery loop 248CRLF carriage return line feed 249CRT cathode ray tube 250CS cable select 251CS chip select 252CS code segment 253CS computer science 254CSDL {common,conceptual} schema definition language 255CSI channel state information 256CSI common system interface 257CSMA carrier sense multiple access 258CSMA/CA carrier sense multiple access with collision avoidance 259CSMA/CD carrier sense multiple access with collision detection 260CSR control [and] status registers 261CSRG Computer Systems Research Group 262CSS cascading style sheets 263CSV comma-separated values 264CTM close to metal 265CTR counter [mode] 266CTS clear to send 267CUA common user access 268CUT coordinated universal time 269CV control voltage 270CVE common vulnerabilities and exposures 271CVS Concurrent Versions System 272DA destination address 273DAA distributed application architecture 274DAB digital audio broadcasting 275DAC digital [to] analog converter 276DAC discretionary access control 277DAD duplicate address detection 278DANE DNS-based Authentication of Named Entities 279DAO disk at once 280DAP Directory Access Protocol 281DAT digital audio tape 282DAT dynamic acceleration technology 283DB database 284DBA database administrator 285DBA dynamic bandwidth allocation 286DBB data bus buffer 287DBC design by contract 288DBL dynamic buffer limiting 289DBMS database management system 290DBS database server 291DC direct current 292DCC Direct Client-to-Client 293DCC direct cable connect 294DCD data carrier detect 295DCE data control equipment 296DCE distributed computing environment 297DCOM distributed component object model 298DCOP Desktop COmmunication Protocol 299DCS data collection systems 300DCT discrete cosine transform 301DCU data cache unit 302DDC display data channel 303DDE dynamic data exchange 304DDK device driver kit 305DDL data description language 306DDR double data rate 307DDS direct digital sound 308DDWG Digital Display Working Group 309DE debugging extensions 310DE desktop environment 311DEA data encryption algorithm 312DEK data encryption key 313DEP data execution prevention 314DER distinguished encoding rules 315DES Data Encryption Standard 316DF don't fragment 317DFA deterministic finite automaton 318DFC data flow control 319DFS depth first search 320DFS distributed file system 321DFT diagnostic function test 322DFT discrete Fourier transform 323DGL data generation language 324DH Diffie-Hellman 325DHCP Dynamic Host Configuration Protocol 326DIFS distributed inter-frame space 327DIMM dual inline memory module 328DIRT design in real time 329DL diode logic 330DL discrete logarithm 331DL download 332DLE data link escape 333DLL dynamic link library 334DLP discrete logarithm problem 335DMA direct memory access 336DMI desktop management interface 337DMS document management system 338DMT discrete multitone modulation 339DNARD Digital network appliance reference design 340DND drag and drop 341DNS Domain Name System 342DNSSEC DNS Security Extensions 343DOE distributed object environment 344DOF data over fibre 345DOM document object model 346DOS denial of service 347DOS disk operating system 348DP DisplayPort 349DPC deferred procedure call 350DPCM differential pulse code modulation 351DPD dead peer detection 352DPI deep packet inspection 353DPI dots per inch 354DPL descriptor privilege level 355DPS Display PostScript 356DPST display power savings technology 357DRAAS disaster recovery as a service 358DRAM dynamic random access memory 359DRBG deterministic random bit generator 360DRI direct rendering infrastructure 361DRM digital rights management 362DRRS display refresh rate switching 363DS debug store 364DSA digital signature algorithm 365DSAP destination service access point 366DSB double-sideband modulation 367DSDT differentiated system descriptor table 368DSL digital subscriber line 369DSL domain specific language 370DSLAM digital subscriber line access multiplexer 371DSN delivery status notification 372DSO dynamic shared object 373DSP digital signal processor 374DSSS direct sequence spread spectrum 375DTD document type definition 376DTE data terminal equipment 377DTE dumb terminal emulator 378DTL diode-transistor logic 379DTLS datagram transport layer security 380DTS digital thermal sensor 381DUT device under test 382DVB digital video broadcasting 383DVCS distributed version control system 384DVD digital versatile disc 385DVFS dynamic voltage and frequency scaling 386DVI device independent 387DVI Digital Visual Interface 388DVR digital video recorder 389E-XER extended XML encoding rules 390EABI embedded-application binary interface 391EAI Email Address Internationalization 392EAI Enterprise Application Integration 393EAP Extensible Authentication Protocol 394EAPOL EAP over Lan 395EBCDIC Extended Binary Coded Decimal Interchange Code 396EBR extended boot record 397EC elliptic curve 398ECC elliptic curve cryptography 399ECC error correction code 400ECDH elliptic curve Diffie-Hellman 401ECDL elliptic curve discrete logarithm 402ECDLP elliptic curve discrete logarithm problem 403ECDSA elliptic curve digital signature algorithm 404ECL emitter-coupled logic 405ECN explicit congestion notification 406ECP enhanced capability port 407ECS enhanced chip set 408ECS extended configuration space 409EDAT enhanced dynamic acceleration technology 410EdDSA Edwards curve digital signature algorithm 411EDGE explicit data graph execution 412EDID extended display identification data 413EDO extended data out 414EDS electronical data sheet 415EEE energy efficient ethernet 416EEPROM electrically erasable programmable read only memory 417EFI extensible firmware interface 418EFL emitter follower logic 419EFM eight to fourteen modulation 420EGA Enhanced Graphics Adapter 421EGP exterior gateway protocol 422EH extension header 423EIDE enhanced IDE 424EISA extended industry standard architecture 425ELF executable and linking format 426ELS entry level system 427EMI electro-magnetic interference 428EMP electro-magnetic pulse 429EMR electro-magnetic radiation 430EOF end of file 431EOI end of interrupt 432EOL end of line 433EOT end of transmission 434EPIC explicitly parallel instruction computing 435EPP enhanced parallel port 436EPRML extended partial response, maximum likelihood 437EPROM erasable programmable read only memory 438ERD emergency recovery disk 439ERD entity relationship diagram 440ERE extended regular expression 441ESDRAM enhanced synchronous dynamic random access memory 442ESS electronic switching system 443ESS extended service set 444ESSID extended service set identifier 445EST enhanced speedstep 446ETL extract, transform, load 447EU execution unit 448EULA end user license agreement 449FAT file allocation table 450FBRAM frame buffer random access memory 451FCL fiber channel loop 452FCS frame check sequence 453FDC floppy disk controller 454FDD floppy disk drive 455FDDI fiber distributed data interface 456FDE full disk encryption 457FEA finite element analysis 458FEC forward error correction 459FET field-effect transistor 460FF finite field 461FF form feed 462FFDH finite-field Diffie-Hellman 463FFH functional fixed hardware 464FFI foreign function interface 465FFM focus follows mouse 466FFS Fast File System 467FFS find first set 468FFT fast Fourier transform 469FG floating gate 470FHSS frequency hop spread spectrum 471FID frequency identifier 472FIFO first in, first out 473FILO first in, last out 474FIPS Federal Information Processing Standards 475FIR fast infrared 476FLOPS floating [point] operations per second 477FLOSS free/libre/open source software 478FM frequency modulation 479FMR false match rate 480FOSS free/open source software 481FPGA field programmable gate array 482FPM fast page mode 483FPR floating point register 484FPU floating point unit 485FQDN fully qualified domain name 486FRR false rejection rate 487FRU field replaceable unit 488FS file system 489FSB front side bus 490FSCK file system check 491FSF Free Software Foundation 492FSK frequency shift keying 493FSM finite-state machine 494FTA fault tree analysis 495FTL flash translation layer 496FTP File Transfer Protocol 497FTPS File Transfer Protocol Secure 498FUS fast user switching 499FWH firmware hub 500FWS folding white space 501GAL generic array logic 502GAS generic address structure 503GC garbage collector 504GCM Galois counter mode 505GCR group-coded recording 506GDT global descriptor table 507GEM graphics environment manager 508GEM graphics execution manager 509GENA general event notification architecture 510GHC Glasgow Haskell compiler 511GID group identifier 512GIF graphics interchange format 513GMCH graphics and memory controller hub 514GNU GNU's Not Unix 515GOP graphics output protocol 516GOT global offset table 517GPE general purpose event 518GPF general protection fault 519GPG GNU Privacy Guard 520GPL [GNU] General Public License 521GPR general purpose register 522GPS generalized processor sharing 523GPT GUID partition table 524GPU graphics processing unit 525GR golden ratio 526GRE generic routing encapsulation 527GSI global system interrupt 528GUI graphical user interface 529GUID globally unique identifier 530GVFS git virtual file system 531HA high availability 532HAL hardware abstraction layer 533HAT hashed array tree 534HBA host bus adapter 535HCF halt and catch fire 536HCI host controller interface 537HCI human-computer interaction 538HCL hardware compatibility list 539HDCP High-bandwidth Digital Content Protection 540HDD hard disk drive 541HDL hardware description language 542HDMI High-Definition Multimedia Interface 543HDTV high-definition television 544HF high frequency 545HFM highest frequency mode 546HID human interface device 547HKP HTTP Keyserver Protocol 548HLL high-level language 549HMA high memory area 550HMI human-machine interface 551HOOD hierarchical object oriented design 552HP Hewlett-Packard 553HPC high performance computing 554HPET high precision event timer 555HSM hardware security module 556HSM hierarchical storage management 557HT hyper-threading 558HTC hardware thermal control 559HTCC high temperature co-fired ceramic 560HTML HyperText Markup Language 561HTT hyper-threading technology 562HTTP Hypertext Transfer Protocol 563HTTPS Hypertext Transfer Protocol Secure 564HVM hardware virtual machine 565HZ Hertz 566I2O intelligent input/output 567IA information assurance 568IAAS infrastructure as a service 569IANA Internet Assigned Numbers Authority 570IBC iterated block cipher 571IBM International Business Machines 572IBS instruction based sampling 573IBSS independent basic service set 574IC integrated circuit 575ICA independent computer architecture 576ICB Internet Citizen's Band 577ICE in-circuit emulator 578ICE internal compiler error 579ICH I/O controller hub 580ICMP Internet Control Message Protocol 581ICT information and communications technology 582ICW initialization command word 583IDA Intel dynamic acceleration 584IDCMP Intuition direct communication message port 585IDE integrated development environment 586IDE integrated drive electronics 587IDPS intrusion detection [and] prevention system 588IDRP inter-domain routing protocol 589IDS intrusion detection system 590IDT interrupt descriptor table 591IE Internet Explorer 592IEC International Electrotechnical Commission 593IEEE Institute of Electrical and Electronics Engineers 594IESG Internet Engineering Steering Group 595IETF Internet Engineering Task Force 596IF intermediate frequency 597IFCM isochronous flow control mode 598IFF Interchange File Format 599IGD Internet gateway device 600IGMP Internet Group Management Protocol 601IGP interior gateway protocol 602IHV independent hardware vendor 603IKE Internet key exchange 604ILM internal loopback mode 605ILOM integrated lights-out management 606ILP instruction level parallelism 607IM instant messaging 608IMAP Internet Message Access Protocol 609IMC integrated memory controller 610IMCR interrupt mode configuration register 611IMR interrupt mask register 612IMS information management system 613INCITS InterNational Committee for Information Technology Standards 614IO input/output 615IOCTL input/output control 616IOMMU input/output memory management unit 617IOT Internet of Things 618IP Internet Protocol 619IP intellectual property 620IPC interprocess communication 621IPE integrated programming environment 622IPI interprocessor interrupt 623IPNG Internet Protocol, Next Generation 624IPS in-plane switching 625IPS intrusion prevention system 626IPSEC Internet Protocol Security 627IRC Internet Relay Chat 628IRDA infrared data association 629IRQ interrupt request 630IRQL interrupt request level 631IRR interrupt request register 632IRTF Internet Research Task Force 633IS information system 634ISA industry standard architecture 635ISA instruction set architecture 636ISDN integrated services digital network 637ISI inter-symbol interference 638ISM industrial, scientific, [and] medical 639ISN initial serial number 640ISO International Standards Organization 641ISOC Internet Society 642ISP Internet service provider 643ISR in-service register 644ISR interrupt service routine 645IST interrupt stack table 646ISV independent software vendor 647IT information technology 648ITB Intel Turbo Boost 649ITIL information technology infrastructure library 650ITSM IT service management 651IV initialization vector 652IVT interrupt vector table 653JBOD just a bunch of disks 654JFET junction [gate] field-effect transistor 655JIT just in time 656JPEG Joint Photographic Experts Group 657JRE Java Runtime Environment 658JTAG joint test action group 659KASLR kernel address space layout randomization 660KB keyboard 661KB kilobyte 662KBD keyboard 663KBD kilobaud 664KLOC thousand lines of code 665KMS kernel-mode setting 666KPI kernel programming interface 667KVA kernel virtual address 668KVM kernel virtual machine 669KVM kernel virtual memory 670KVM keyboard, video, [and] mouse 671LAMP Linux Apache MySQL {Perl,PHP,Python} 672LAN local area network 673LAPIC local advanced programmable interrupt controller 674LAR load access rights 675LBA logical block addressing 676LBS location-based service 677LCD liquid crystal display 678LCP link control protocol 679LDA local delivery agent 680LDAP Lightweight Directory Access Protocol 681LDR light-dependent resistor 682LDT local descriptor table 683LE logical extent 684LED light emitting diode 685LER label edge router 686LF line feed 687LF low frequency 688LFM lowest frequency mode 689LFN long file names 690LFO low-frequency oscillation 691LFS log-structured file system 692LFU least frequently used 693LHP loop heat pipe 694LIFO last in, first out 695LILO LInux LOader 696LILO last in, last out 697LINT local interrupt 698LIR local Internet registry 699LKM {Linux,loadable} kernel module 700LKML Linux kernel mailing list 701LL load linked 702LL/SC load linked/store conditional 703LLC logical link control 704LLDP link layer discovery protocol 705LLF low level format 706LLMNR link-local multicast name resolution 707LLVM Low Level Virtual Machine 708LM long mode 709LMM link management mode 710LNO loop nest optimization 711LOC lines of code 712LOM lights-out management 713LPC low pin count 714LPS local positioning system 715LRC longitudinal redundancy check 716LRM left-to-right mark 717LRO left-to-right override 718LRU least recently used 719LSB Linux standards base 720LSB least significant {bit,byte} 721LSI large scale integration 722LSL load segment limit 723LSN Large Scale NAT 724LSN log sequence number 725LSR label switch router 726LTCC low temperature co-fired ceramic 727LTO linear tape-open 728LTO link time optimization 729LTR left to right 730LTR load task register 731LTR letter(-sized paper) 732LTS long term support 733LUA Lua Uppercase Accident 734LUN logical unit number 735LV logical volume 736LVM logical volume management 737LVT local vector table 738LWP light-weight process 739LZW Lempel Ziv Welch 740MAC mandatory access control 741MAC {media,medium} access control 742MAC message authentication {check,code} 743MADT multiple APIC descriptor table 744MB megabyte 745MBA multi-boot agent 746MBR master boot record 747MBS megabits per second 748MC memory controller 749MCA machine check architecture 750MCA MicroChannel architecture 751MCC multiversion concurrency control 752MCE machine check exception 753MCGA Multi-Color Graphics Array 754MCH memory controller hub 755MCM multi-chip module 756MCQ memory controlled queue 757MD machine-dependent 758MDA mail delivery agent 759MDA Monochrome Display Adapter 760MDRAM multibank dynamic random access memory 761MESI modified, exclusive, shared, invalid 762MFC merge from current 763MFC Microsoft Foundation Classes 764MFM modified frequency modulation 765MI machine-independent 766MIB management information base 767MIC message integrity {check,code} 768MID mobile Internet device 769MIDI musical instrument digital interface 770MIF management information format 771MII media independent interface 772MIM man in the middle 773MIMD multiple instruction, multiple data 774MIME Multipurpose Internet Mail Extensions 775MIMO multiple input multiple output 776MIPS million instructions per second 777MISD multiple instruction, single data 778MIT Massachusetts Institute of Technology 779MITM man in the middle 780ML machine language 781ML machine learning 782ML mailing list 783ML markup language 784ML maximum likelihood 785MLC multi-level cell 786MLD multicast listener discovery 787MLHP micro loop heat pipe 788MMF multi-mode fiber 789MMIC monolithic microwave integrated circuit 790MMIO memory mapped input/output 791MMORPG massive multiplayer online role playing game 792MMU memory management unit 793MMX matrix math extension 794MMX multimedia extension 795MMX multiple math extension 796MO magneto-optical 797MOESI modified, owned, exclusive, shared, invalid 798MOF maximum operating frequency 799MOSFET metal-oxide-semiconductor field-effect transistor 800MOSI modified, owned, shared, invalid 801MP multi-platform 802MP multiplayer 803MP {multiprocessing,multiprocessor} 804MPEG moving picture experts group 805MPI message passing interface 806MPLS Multiprotocol Label Switching 807MPP massively parallel processor 808MPS memory pool system 809MPS multiprocessor specification 810MR modem ready 811MRU most recently used 812MS Microsoft 813MSB most significant {bit,byte} 814MSE mean square error 815MSF minutes seconds frames 816MSI message signaled interrupt 817MSI modified, shared, invalid 818MSR machine state register 819MSS maximum segment size 820MSTP Multiple Spanning Tree Protocol 821MT machine translation 822MTA mail transfer agent 823MTBF mean time between failures 824MTP media transfer protocol 825MTRR memory type range register 826MTTF mean time to failure 827MTU maximum transmission unit 828MUA mail user agent 829MUD multi-user domain 830MVCC multiversion concurrency control 831MWE module width encoding 832MX mail exchange 833NACK negative acknowledgement 834NAN not a number 835NAPT Network Address Port Translation 836NAS network attached storage 837NAT network address translation 838NAV network allocation vector 839NC numerical control 840NCO numerically-controlled oscillator 841NCP Network Control Protocol 842NCQ native command queuing 843ND neighbor discovery 844NDFA nondeterministic finite automaton 845NE numeric error 846NFA nondeterministic finite automaton 847NFC near-field communication 848NFCI no functional change intended 849NFS network file system 850NFV network function virtualization 851NIA next instruction address 852NIC network information center 853NIC network interface card 854NIDS network intrusion detection system 855NIP network interface protocol 856NIPS network intrusion prevention system 857NIS network information service 858NIST National Institute of Standards and Technology 859NLS native language support 860NMI non-maskable interrupt 861NNTP Network News Transfer Protocol 862NOC network operations center 863NOP no operation 864NOS network operating system 865NP nondeterministic polynomial time 866NRZ non-return to zero 867NSA nation-state adversary 868NSA no such agency 869NSA National Security Agency 870NTM non-deterministic Turing machine 871NTP Network Time Protocol 872NUMA non-uniform memory access 873NVRAM non-volatile random access memory 874NW not write-through 875NX no execute 876OAEP optimal asymmetric encryption padding 877OBO off by one 878OBOE off by one error 879OCL object constraint language 880OCR optical character recognition 881ODCM on-demand clock modulation 882ODT on-die termination 883OEM original equipment manufacturer 884OFB output feedback 885OFDM orthogonal frequency division multiplexing 886OFET organic field-effect transistor 887OLAP online analytical processing 888OLE object linking and embedding 889OLTP online transaction processing 890ONFI open nand flash interface 891OO OpenOffice 892OO object oriented 893OOB out of band 894OOE out of order execution 895OOM out of memory 896OOO OpenOffice.org 897OOP object oriented programming 898OOPS object oriented programming systems 899OOSE object oriented software engineering 900OPM operations per minute 901OPS operations per second 902OQL Object Query Language 903ORB object request broker 904ORM object-relational mapping 905OS operating system 906OSD open source definition 907OSF open software foundation 908OSI Open Source Initiative 909OSI open systems interconnection 910OSPF open shortest path first 911OSPM OS power management 912OSS open sound system 913OSS open source software 914OSVW operating system visible workarounds 915OTP one time password 916OTP open telecom platform 917OU organizational unit 918OUI organizationally unique identifier 919OWL Web Ontology Language 920P2P PCI to PCI 921P2P peer to peer 922PA phase accumulator 923PA physical address 924PAAS platform as a service 925PAC phase-amplitude converter 926PAE physical address extension 927PAL phase alternating line 928PAL programmable array logic 929PAM pluggable authentication modules 930PAM pulse amplitude modulation 931PAP password authentication protocol 932PAT page attribute table 933PAT port address translation 934PATA parallel ATA 935PAX portable archive exchange 936PBE pending break encoding 937PBE programming by example 938PC personal computer 939PC program counter 940PCB printed circuit board 941PCB process control block 942PCC Portable C Compiler 943PCD page-level cache disable 944PCE performance-monitor counter enable 945PCI peripheral component interconnect 946PCM phase change memory 947PCM pulse code modulation 948PCMCIA Personal Computer Memory Card International Association 949PCP Port Control Protocol 950PD public domain 951PDA personal digital assistant 952PDA pushdown automaton 953PDAG propositional directed acyclic graph 954PDB power distribution board 955PDF portable document format 956PDM pulse-duration modulation 957PDN pull-down network 958PDP page {descriptor,directory} page 959PDS product data sheet 960PDU protocol data unit 961PE protection enable 962PEAP Protected EAP 963PECI platform environment control interface 964PEP protocol extension protocol 965PER packed encoding rules 966PFS perfect forward secrecy 967PGAS partitioned global address space 968PGE page global enable 969PGP Pretty Good Privacy 970PHB PCI host bridge 971PHP PHP: Hypertext Preprocessor 972PIC position independent code 973PIC programmable interrupt controller 974PICNIC problem in chair, not in computer 975PID process id 976PIE position independent executable 977PIL Priority Interrupt Level 978PIM personal information manager 979PIM platform-independent model 980PIO programmed input/output 981PIPT physically indexed, physically tagged 982PIQ prefetch input queue 983PIT programmable interrupt timer 984PIV personal identity verification 985PKCS public-key cryptography standards 986PKI public key infrastructure 987PLC programmable logic controller 988PLD programmable logic device 989PLL phase locked loop 990PLRU pseudo LRU 991PLTM package level thermal management 992PM power management 993PM {phase,pulse} modulation 994PME power management event 995PMI platform management interrupt 996PMIO port-mapped input/output 997PMT photo-multiplier tube 998PMU power management unit 999PNG portable network graphics 1000PNP plug and play 1001POE power over ethernet 1002POF probability of failure 1003POP Post Office Protocol 1004POP power on password 1005POSIX Portable Operating System Interface [for Unix] 1006POST power on self test 1007POTS plain old telephone system 1008PP pair programming 1009PPB PCI [to] PCI bridge 1010PPC PowerPC 1011PPI pixels per inch 1012PPM pages per minute 1013PPP Point-to-Point Protocol 1014PPPOA Point-to-Point Protocol over ATM 1015PPPOE Point-to-Point Protocol over Ethernet 1016PPU physics processing unit 1017PRBS pseudorandom bit sequence 1018PRG pseudorandom generator 1019PRF pseudorandom function [family] 1020PRML partial response, maximum likelihood 1021PRN pseudorandom {noise,number} 1022PRNG pseudorandom number generator 1023PROM programmable read only memory 1024PRP pseudorandom permutation 1025PSD power spectral density 1026PSE page size extensions 1027PSK phase shift keying 1028PSK pre-shared key 1029PSTN public switched telephone network 1030PSW program status word 1031PTE page table entry 1032PTLA pseudo top level aggregator 1033PTP page table page 1034PTV perceived target value 1035PU processing unit 1036PUN physical unit number 1037PV physical volume 1038PVG physical volume group 1039PVI protected-mode virtual interrupt 1040PVST Per-VLAN Spanning Tree 1041PWM pulse width modulation 1042PXE preboot execution environment 1043QA quality assurance 1044QAM quadrature amplitude modulation 1045QAM quality assurance management 1046QBE query by example 1047QC quality control 1048QDI quasi delay insensitive 1049QOS quality of service 1050QVL qualified vendor list 1051R/O read only 1052R/W read/write 1053RA receiver address 1054RA remote assistance 1055RA resource affinity 1056RA router advertisement 1057RAD rapid application development 1058RAID redundant array of {independent,inexpensive} disks 1059RAM random access memory 1060RAS reliability, availability and serviceability 1061RAS remote access service 1062RAS restartable atomic sequence 1063RAS row address strobe 1064RBF radial basis function 1065RBT red-black tree 1066RC release candidate 1067RC remote control 1068RCS Revision Control System 1069RCS revision control system 1070RCU read, copy, update 1071RDB Rigid Disk Block 1072RDBMS relational database management system 1073RDF Resource Description Framework 1074RDM relational data model 1075RDMA remote direct memory access 1076RE regular expression 1077REST representational state transfer 1078RF radio frequency 1079RFI radio frequency interference 1080RFO request for ownership 1081RGB red green blue 1082RGBA red green blue alpha 1083RGMII reduced gigabit media independent interface 1084RH read hit 1085RHEL Red Hat Enterprise Linux 1086RHL Red Hat Linux 1087RIB routing information base 1088RIFF Resource Interchange File Format 1089RIP Routing Information Protocol 1090RIR regional Internet registry 1091RISC reduced instruction set {computer,computing} 1092RKM ROM Kernel Manual 1093RLE run length encoding 1094RLL run length limited 1095RLO right-to-left override 1096RM read miss 1097RMI remote method invocation 1098RMO Relaxed Memory Ordering 1099RMPM rapid memory power management 1100RMS root mean square 1101RMW read, modify, write 1102RNG random number generator 1103ROM read only memory 1104RPC remote procedure call 1105RPKI resource PKI 1106RPL requested privilege level 1107RPM revolutions per minute 1108RPN reverse Polish notation 1109RPVST Rapid Per-VLAN Spanning Tree 1110RR random replacement 1111RR round robin 1112RS relay station 1113RSA Rivest, Shamir, [and] Adleman 1114RSIP Realm Specific IP 1115RSN Robust Secure Network 1116RSS really simple syndication 1117RSS residual sum of squares 1118RSTP Rapid Spanning Tree Protocol 1119RT real time 1120RTC real time clock 1121RTC real time computing 1122RTF rich text format 1123RTL register transfer language 1124RTL resistor-transistor logic 1125RTL right to left 1126RTOS real time operating system 1127RTS request to send 1128RTT round trip time 1129RUP rational unified process 1130RW Rabin-Williams 1131RWM read-write memory 1132RX {receive,receiver} 1133S/PDIF Sony/Philips Digital Interface Format 1134SA security advisory 1135SA security association 1136SA source address 1137SA structured analysis 1138SAAS software as a service 1139SACD super audio compact disc 1140SAD security association database 1141SAL system abstraction layer 1142SAM serial access memory 1143SAM sum addressed memory 1144SAN storage area network 1145SAP service access point 1146SAPIC streamlined advanced programmable interrupt controller 1147SASD structured analysis, structured design 1148SASI Shugart Associates System Interface 1149SASL simple authentication [and] security layer 1150SATA serial advanced technology attachment 1151SB sound blaster 1152SBU standard build unit 1153SC store conditional 1154SCA source code analyzer 1155SCADA supervisory control and data acquisition 1156SCC single chip cloud 1157SCC source code control 1158SCCS Source Code Control System 1159SCI scalable coherent interface 1160SCI system control interrupt 1161SCM software configuration management 1162SCM source code management 1163SCM storage-class memory 1164SCP secure copy 1165SCSI Small Computer System Interface 1166SCTP Stream Control Transmission Protocol 1167SDI symbol deinterleave 1168SDK software development kit 1169SDL Simple Declarative Language 1170SDL Simple Direct-media Layer 1171SDLC {software,system,systems} development life cycle 1172SDN software defined networking 1173SDRAM synchronous dynamic random access memory 1174SDS software defined storage 1175SDT syntax-directed translation 1176SEGV segmentation violation 1177SEO search engine optimization 1178SFC sequential function chart 1179SFI simple firmware interface 1180SFI software fault isolation 1181SFTP SSH File Transfer Protocol 1182SFTP Serial File Transfer Protocol 1183SFTP Simple File Transfer Protocol 1184SGMII serial gigabit media independent interface 1185SGRAM synchronous graphics random access memory 1186SHA secure hash algorithm 1187SIDH supersingular isogeny Diffie-Hellman 1188SIEM security information and event management 1189SIFS short inter-frame space 1190SIMD single instruction, multiple data 1191SIMM single inline memory module 1192SIP Session Initiation Protocol 1193SIR signal-to-interference ratio 1194SIR slow infrared 1195SISD single instruction, single data 1196SLC single-level cell 1197SLDRAM synchronous-link dynamic random access memory 1198SLED single large expensive disk 1199SLI scalable link interface 1200SLI scan-line interleave 1201SLOC source lines of code 1202SLRU segmented LRU 1203SMA smart memory access 1204SMAF system management action field 1205SMAP Simple Mail Access Protocol 1206SMAP supervisor mode access prevention 1207SMART self-monitoring analysis and reporting technology 1208SMBIOS System Management BIOS 1209SMC system management controller 1210SMEP supervisor mode execution protection 1211SMF single mode fiber 1212SMI structure of management information 1213SMI system management interrupt 1214SMM system management mode 1215SMP symmetric multiprocessing 1216SMT simultaneous multithreading 1217SMTP Simple Mail Transfer Protocol 1218SMU system management unit 1219SNAP Sub-Network Access Protocol 1220SNMP Simple Network Management Protocol 1221SNR signal-to-noise ratio 1222SOA service oriented architecture 1223SOAP Simple Object Access Protocol 1224SOC system on chip 1225SOF start of frame 1226SOH start of header 1227SOHO small office/home office 1228SOL serial over LAN 1229SP service pack 1230SP stack pointer 1231SPARC scalable processor architecture 1232SPARQL SPARQL Protocol and RDF Query Language 1233SPD security policy database 1234SPD serial presence detect 1235SPDIF Sony/Philips digital interface format 1236SPI serial peripheral interface 1237SPI stateful packet inspection 1238SPL system interrupt priority level 1239SPL spinlock 1240SPMD single process, multiple data 1241SPR special purpose register 1242SPT sectors per track 1243SQA software quality assurance 1244SQL Structured Query Language 1245SRAM static random access memory 1246SRC sample rate conversion 1247SS self-snoop 1248SS stack segment 1249SSA static single assignment 1250SSAP source service access point 1251SSB single-sideband modulation 1252SSD solid state drive 1253SSE streaming SIMD extensions 1254SSFDC solid state floppy disc card 1255SSH secure shell 1256SSI server side includes 1257SSID service set identifier 1258SSL secure sockets layer 1259SSP stack smashing protection 1260STC software thermal control 1261STD state transition diagram 1262STP Spanning Tree Protocol 1263STP shielded twisted pair 1264SUS Single Unix Specification 1265SUT system under test 1266SVG scalable vector graphics 1267SVGA Super Video Graphics Array 1268SVM secure virtual machine 1269SVM support vector machine 1270SVR System V Release 1271SVS Separate Virtual Space 1272SWF Shockwave Flash 1273SWIG simplified wrapper [and] interface generator 1274SYR symbol timing recovery 1275TA test assertion 1276TA transmitter address 1277TAI international atomic time 1278TAO track at once 1279TAOCP The Art of Computer Programming 1280TAP Test Anything Protocol 1281TAS test and set 1282TB terabyte 1283TCB trace capture buffer 1284TCB trusted computing base 1285TCC thermal control circuit 1286TCL tool command language 1287TCP Transmission Control Protocol 1288TCQ tagged command queueing 1289TDC time [to] digital converter 1290TDD test driven development 1291TDD time division duplex 1292TDM time division multiplexing 1293TDMA time division multiple access 1294TDOA time difference of arrival 1295TDP thermal design {point,power} 1296TECO Text Editor and Corrector 1297TFT thin film transistor 1298TFTP Trivial File Transfer Protocol 1299TIAS try it and see 1300TIFF tagged image file format 1301TITS try it to see 1302TK temporal key 1303TKIP Temporal Key Integrity Protocol 1304TLA top level aggregator 1305TLB translation lookaside buffer 1306TLD top level domain 1307TLS thread local storage 1308TLS transport layer security 1309TM Turing machine 1310TM thermal monitor 1311TMDS transition minimized differential signaling 1312TMO timeout 1313TOD time of day 1314TOS terms of service 1315TOS trusted operating system 1316TOS type of service 1317TP transaction processing 1318TPI tracks per inch 1319TPM transactions per minute 1320TPM trusted platform module 1321TPR task priority register 1322TPS transactions per second 1323TPS transmission parameters signaling 1324TR task register 1325TR token ring 1326TRL timing recovery loop 1327TRNG true random number generator 1328TS terminal services 1329TS time series 1330TS time stamp 1331TS transport stream 1332TSC time stamp counter 1333TSD time stamp disable 1334TSL test, set, lock 1335TSO time sharing option 1336TSO Total Store Ordering 1337TSP Time-Stamp Protocol 1338TSP Tunnel Setup Protocol 1339TSP time synchronization protocol 1340TSP traveling salesman problem 1341TSS task state segment 1342TTL time to live 1343TTL transistor-transistor logic 1344TTM translation table maps 1345TTY teletype 1346TUI {terminal,text-based,textual} user interface 1347TX {transmit out,transmitter} 1348TZ time zone 1349UAC user {access,account} control 1350UAF use-after-free 1351UART universal asynchronous receiver/transmitter 1352UAT user acceptance testing 1353UB undefined behavior 1354UC uncacheable 1355UCS uniform-cost search 1356UDMA ultra DMA 1357UDO ultra density optical 1358UDP User Datagram Protocol 1359UEFI unified extensible firmware interface 1360UFS Unix File System 1361UGA universal graphics adapter 1362UI unit interval 1363UI user interface 1364UID unique identifier 1365UID user identifier 1366UL upload 1367UMA uniform memory access 1368UMA upper memory area 1369UMB upper memory block 1370UML unified modeling language 1371UMPC ultra-mobile PC 1372UPNP universal plug and play 1373UPS uninterruptible power supply 1374URI uniform resource identifier 1375URL uniform resource locator 1376URN uniform resource name 1377USART universal synchronous/asynchronous receiver/transmitter 1378USB universal serial bus 1379USWC uncacheable speculative write combining 1380UT unit test 1381UTC coordinated universal time 1382UTP unshielded twisted pair 1383UUCP Unix-to-Unix Copy Protocol 1384UUID universally unique identifier 1385UUOC useless use of cat 1386UUT unit under test 1387UX user experience 1388VA vertical alignment 1389VA virtual address 1390VA volt-ampere 1391VAX virtual address extension 1392VB Visual Basic 1393VCA variable-gain amplifier 1394VCC common collector voltage 1395VCF voltage-controlled filter 1396VCM virtual channel memory 1397VCO voltage-controlled oscillator 1398VCS version control system 1399VESA Video Electronics Standards Association 1400VFO variable-frequency oscillator 1401VG volume group 1402VGA Video Graphics Array 1403VHDCI very high density cable interconnect 1404VID voltage level identifier 1405VIPT virtually indexed, physically tagged 1406VIVT virtually indexed, virtually tagged 1407VLAN virtual local area network 1408VLIW very long instruction word 1409VLSI very large scale integration 1410VLSM variable length subnet mask 1411VM virtual {machine,memory} 1412VME virtual mode extension 1413VMX vector multimedia extensions 1414VMX virtual machine extensions 1415VOD video on demand 1416VPN virtual private network 1417VR virtual reality 1418VRAM video random access memory 1419VRF virtual routing and forwarding 1420VRM voltage regulator module 1421VRRP Virtual Router Redundancy Protocol 1422VSTP VLAN Spanning Tree Protocol 1423VTP VLAN Trunking Protocol 1424W watt 1425W3C World Wide Web Consortium 1426WAN wide area network 1427WAP Wireless Application Protocol 1428WAP wireless access point 1429WDT watchdog timer 1430WEP Wired Equivalent Privacy 1431WFI wait for interrupt 1432WFQ weighted fair queuing 1433WH write hit 1434WIFI wireless fidelity 1435WLAN wireless local area network 1436WM write miss 1437WMI Windows Management Instrumentation 1438WOL Wake-on-LAN 1439WOM Wake-on-Modem 1440WOR Wake-on-Ring 1441WORM write once read many 1442WP WordPerfect 1443WP word processor 1444WP write protect 1445WPA Wi-Fi Protected Access 1446WPA2 Wi-Fi Protected Access II 1447WPS Wi-Fi Protected Setup 1448WRAM window random access memory 1449WS web services 1450WTC write through caching 1451WWAN wireless wide area network 1452WWW world wide web 1453WYSIWYG what you see is what you get 1454XBAR crossbar 1455XDMCP X Display Manager control protocol 1456XER XML encoding rules 1457XGA Extended Graphics Array 1458XIP execute in place 1459XML Extensible Markup Language 1460XOR exclusive or 1461XP extreme programming 1462XSI X/Open System Interface 1463XSL extensible stylesheet language 1464XSS cross site scripting 1465XT extended technology 1466XUL XML user interface language 1467YACC yet another compiler compiler 1468YAWPFAPR you are welcome; please file a problem report 1469YP Yellow Pages 1470YTD year to date 1471ZBR zone bit recording 1472ZFOD zero-filled on demand 1473ZIF zero insertion force 1474ZIFS zero insertion force socket 1475ZMA zone multicast address 1476