acronyms.comp revision 1.193
1$NetBSD: acronyms.comp,v 1.193 2018/03/01 19:09:33 ginsbach Exp $ 23WHS three-way handshake 38VSB 8-state vestigial side band modulation 4AA anti-aliasing 5AAA authentication, authorization, [and] accounting 6AAT average access time 7ABI application binary interface 8ABR available bit rate 9AC alternating current 10ACI adjacent channel interferer 11ACID atomicity, consistency, isolation, durability 12ACK Amsterdam compiler kit 13ACK acknowledgement 14ACL access control list 15ACL active current loop 16ACP auxillary control {process,program} 17ACPI advanced configuration and power interface 18ACS access control set 19ACU automatic calling unit 20ADB Apple desktop bus 21ADC analog [to] digital converter 22ADD acronym driven development 23ADO active data objects 24ADP automatic data processing 25ADPCM adaptive differential pulse code modulation 26ADS alternate data stream 27ADSL asymmetric digital subscriber line 28ADT abstract data type 29AES Advanced Encryption Standard 30AFS Andrew File System 31AGC automatic gain control 32AGP accelerated graphics port 33AI analog input 34AI artificial intelligence 35AL access list 36AL active link 37ALE address latch enable 38ALS ambient light sensor 39ALU arithmetic and logical unit 40ALUA asymmetric logical unit access 41AM access method 42AM alignment mask 43AM amplitude modulation 44AMI alternate mark inversion 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 547HLL high-level language 548HMA high memory area 549HMI human-machine interface 550HOOD hierarchical object oriented design 551HP Hewlett-Packard 552HPC high performance computing 553HPET high precision event timer 554HSM hardware security module 555HSM hierarchical storage management 556HT hyper-threading 557HTC hardware thermal control 558HTCC high temperature co-fired ceramic 559HTML HyperText Markup Language 560HTT hyper-threading technology 561HTTP Hypertext Transfer Protocol 562HTTPS Hypertext Transfer Protocol Secure 563HVM hardware virtual machine 564HZ Hertz 565I2O intelligent input/output 566IA information assurance 567IAAS infrastructure as a service 568IANA Internet Assigned Numbers Authority 569IBC iterated block cipher 570IBM International Business Machines 571IBS instruction based sampling 572IBSS independent basic service set 573IC integrated circuit 574ICA independent computer architecture 575ICB Internet Citizen's Band 576ICE in-circuit emulator 577ICE internal compiler error 578ICH I/O controller hub 579ICMP Internet Control Message Protocol 580ICT information and communications technology 581ICW initialization command word 582IDA Intel dynamic acceleration 583IDCMP Intuition direct communication message port 584IDE integrated development environment 585IDE integrated drive electronics 586IDPS intrusion detection [and] prevention system 587IDRP inter-domain routing protocol 588IDS intrusion detection system 589IDT interrupt descriptor table 590IE Internet Explorer 591IEC International Electrotechnical Commission 592IEEE Institute of Electrical and Electronics Engineers 593IESG Internet Engineering Steering Group 594IETF Internet Engineering Task Force 595IF intermediate frequency 596IFCM isochronous flow control mode 597IFF Interchange File Format 598IGD Internet gateway device 599IGMP Internet Group Management Protocol 600IGP interior gateway protocol 601IHV independent hardware vendor 602IKE Internet key exchange 603ILM internal loopback mode 604ILOM integrated lights-out management 605ILP instruction level parallelism 606IM instant messaging 607IMAP Internet Message Access Protocol 608IMC integrated memory controller 609IMCR interrupt mode configuration register 610IMR interrupt mask register 611IMS information management system 612INCITS InterNational Committee for Information Technology Standards 613IO input/output 614IOCTL input/output control 615IOMMU input/output memory management unit 616IOT Internet of Things 617IP Internet Protocol 618IP intellectual property 619IPC interprocess communication 620IPE integrated programming environment 621IPI interprocessor interrupt 622IPNG Internet Protocol, Next Generation 623IPS in-plane switching 624IPS intrusion prevention system 625IPSEC Internet Protocol Security 626IRC Internet Relay Chat 627IRDA infrared data association 628IRQ interrupt request 629IRQL interrupt request level 630IRR interrupt request register 631IRTF Internet Research Task Force 632IS information system 633ISA industry standard architecture 634ISA instruction set architecture 635ISDN integrated services digital network 636ISI inter-symbol interference 637ISM industrial, scientific, [and] medical 638ISN initial serial number 639ISO International Standards Organization 640ISOC Internet Society 641ISP Internet service provider 642ISR in-service register 643ISR interrupt service routine 644IST interrupt stack table 645ISV independent software vendor 646IT information technology 647ITB Intel Turbo Boost 648ITIL information technology infrastructure library 649ITSM IT service management 650IV initialization vector 651IVT interrupt vector table 652JBOD just a bunch of disks 653JFET junction [gate] field-effect transistor 654JIT just in time 655JPEG Joint Photographic Experts Group 656JRE Java Runtime Environment 657JTAG joint test action group 658KASLR kernel address space layout randomization 659KB keyboard 660KB kilobyte 661KBD keyboard 662KBD kilobaud 663KLOC thousand lines of code 664KMS kernel-mode setting 665KPI kernel programming interface 666KVA kernel virtual address 667KVM kernel virtual machine 668KVM kernel virtual memory 669KVM keyboard, video, [and] mouse 670LAMP Linux Apache MySQL {Perl,PHP,Python} 671LAN local area network 672LAPIC local advanced programmable interrupt controller 673LAR load access rights 674LBA logical block addressing 675LBS location-based service 676LCD liquid crystal display 677LCP link control protocol 678LDA local delivery agent 679LDAP Lightweight Directory Access Protocol 680LDR light-dependent resistor 681LDT local descriptor table 682LE logical extent 683LED light emitting diode 684LER label edge router 685LF line feed 686LF low frequency 687LFM lowest frequency mode 688LFN long file names 689LFO low-frequency oscillation 690LFS log-structured file system 691LFU least frequently used 692LHP loop heat pipe 693LIFO last in, first out 694LILO LInux LOader 695LILO last in, last out 696LINT local interrupt 697LIR local Internet registry 698LKM {Linux,loadable} kernel module 699LKML Linux kernel mailing list 700LL load linked 701LL/SC load linked/store conditional 702LLC logical link control 703LLDP link layer discovery protocol 704LLF low level format 705LLMNR link-local multicast name resolution 706LLVM Low Level Virtual Machine 707LM long mode 708LMM link management mode 709LNO loop nest optimization 710LOC lines of code 711LOM lights-out management 712LPC low pin count 713LPS local positioning system 714LRC longitudinal redundancy check 715LRM left-to-right mark 716LRO left-to-right override 717LRU least recently used 718LSB Linux standards base 719LSB least significant {bit,byte} 720LSI large scale integration 721LSL load segment limit 722LSN Large Scale NAT 723LSN log sequence number 724LSR label switch router 725LTCC low temperature co-fired ceramic 726LTO linear tape-open 727LTO link time optimization 728LTR left to right 729LTR load task register 730LTR letter(-sized paper) 731LTS long term support 732LUA Lua Uppercase Accident 733LUN logical unit number 734LV logical volume 735LVM logical volume management 736LVT local vector table 737LWP light-weight process 738LZW Lempel Ziv Welch 739MAC mandatory access control 740MAC {media,medium} access control 741MAC message authentication {check,code} 742MADT multiple APIC descriptor table 743MB megabyte 744MBA multi-boot agent 745MBR master boot record 746MBS megabits per second 747MC memory controller 748MCA machine check architecture 749MCA MicroChannel architecture 750MCC multiversion concurrency control 751MCE machine check exception 752MCGA Multi-Color Graphics Array 753MCH memory controller hub 754MCM multi-chip module 755MCQ memory controlled queue 756MD machine-dependent 757MDA mail delivery agent 758MDA Monochrome Display Adapter 759MDRAM multibank dynamic random access memory 760MESI modified, exclusive, shared, invalid 761MFC merge from current 762MFC Microsoft Foundation Classes 763MFM modified frequency modulation 764MI machine-independent 765MIB management information base 766MIC message integrity {check,code} 767MID mobile Internet device 768MIDI musical instrument digital interface 769MIF management information format 770MII media independent interface 771MIM man in the middle 772MIMD multiple instruction, multiple data 773MIME Multipurpose Internet Mail Extensions 774MIMO multiple input multiple output 775MIPS million instructions per second 776MISD multiple instruction, single data 777MIT Massachusetts Institute of Technology 778MITM man in the middle 779ML machine language 780ML machine learning 781ML mailing list 782ML markup language 783ML maximum likelihood 784MLC multi-level cell 785MLD multicast listener discovery 786MLHP micro loop heat pipe 787MMF multi-mode fiber 788MMIC monolithic microwave integrated circuit 789MMIO memory mapped input/output 790MMORPG massive multiplayer online role playing game 791MMU memory management unit 792MMX matrix math extension 793MMX multimedia extension 794MMX multiple math extension 795MO magneto-optical 796MOESI modified, owned, exclusive, shared, invalid 797MOF maximum operating frequency 798MOSFET metal-oxide-semiconductor field-effect transistor 799MOSI modified, owned, shared, invalid 800MP multi-platform 801MP multiplayer 802MP {multiprocessing,multiprocessor} 803MPEG moving picture experts group 804MPI message passing interface 805MPLS Multiprotocol Label Switching 806MPP massively parallel processor 807MPS memory pool system 808MPS multiprocessor specification 809MR modem ready 810MRU most recently used 811MS Microsoft 812MSB most significant {bit,byte} 813MSE mean square error 814MSF minutes seconds frames 815MSI message signaled interrupt 816MSI modified, shared, invalid 817MSR machine state register 818MSS maximum segment size 819MSTP Multiple Spanning Tree Protocol 820MT machine translation 821MTA mail transfer agent 822MTBF mean time between failures 823MTP media transfer protocol 824MTRR memory type range register 825MTTF mean time to failure 826MTU maximum transmission unit 827MUA mail user agent 828MUD multi-user domain 829MVCC multiversion concurrency control 830MWE module width encoding 831MX mail exchange 832NACK negative acknowledgement 833NAN not a number 834NAPT Network Address Port Translation 835NAS network attached storage 836NAT network address translation 837NAV network allocation vector 838NC numerical control 839NCO numerically-controlled oscillator 840NCP Network Control Protocol 841NCQ native command queuing 842ND neighbor discovery 843NDFA nondeterministic finite automaton 844NE numeric error 845NFA nondeterministic finite automaton 846NFC near-field communication 847NFCI no functional change intended 848NFS network file system 849NFV network function virtualization 850NIA next instruction address 851NIC network information center 852NIC network interface card 853NIDS network intrusion detection system 854NIP network interface protocol 855NIPS network intrusion prevention system 856NIS network information service 857NIST National Institute of Standards and Technology 858NLS native language support 859NMI non-maskable interrupt 860NNTP Network News Transfer Protocol 861NOC network operations center 862NOP no operation 863NOS network operating system 864NP nondeterministic polynomial time 865NRZ non-return to zero 866NSA nation-state adversary 867NSA no such agency 868NSA National Security Agency 869NTM non-deterministic Turing machine 870NTP Network Time Protocol 871NUMA non-uniform memory access 872NVRAM non-volatile random access memory 873NW not write-through 874NX no execute 875OAEP optimal asymmetric encryption padding 876OBO off by one 877OBOE off by one error 878OCL object constraint language 879OCR optical character recognition 880ODCM on-demand clock modulation 881ODT on-die termination 882OEM original equipment manufacturer 883OFB output feedback 884OFDM orthogonal frequency division multiplexing 885OFET organic field-effect transistor 886OLAP online analytical processing 887OLE object linking and embedding 888OLTP online transaction processing 889ONFI open nand flash interface 890OO OpenOffice 891OO object oriented 892OOB out of band 893OOE out of order execution 894OOM out of memory 895OOO OpenOffice.org 896OOP object oriented programming 897OOPS object oriented programming systems 898OOSE object oriented software engineering 899OPM operations per minute 900OPS operations per second 901OQL Object Query Language 902ORB object request broker 903ORM object-relational mapping 904OS operating system 905OSD open source definition 906OSF open software foundation 907OSI Open Source Initiative 908OSI open systems interconnection 909OSPF open shortest path first 910OSPM OS power management 911OSS open sound system 912OSS open source software 913OSVW operating system visible workarounds 914OTP one time password 915OTP open telecom platform 916OU organizational unit 917OUI organizationally unique identifier 918OWL Web Ontology Language 919P2P PCI to PCI 920P2P peer to peer 921PA phase accumulator 922PA physical address 923PAAS platform as a service 924PAC phase-amplitude converter 925PAE physical address extension 926PAL phase alternating line 927PAL programmable array logic 928PAM pluggable authentication modules 929PAM pulse amplitude modulation 930PAP password authentication protocol 931PAT page attribute table 932PAT port address translation 933PATA parallel ATA 934PAX portable archive exchange 935PBE pending break encoding 936PBE programming by example 937PC personal computer 938PC program counter 939PCB printed circuit board 940PCB process control block 941PCC Portable C Compiler 942PCD page-level cache disable 943PCE performance-monitor counter enable 944PCI peripheral component interconnect 945PCM phase change memory 946PCM pulse code modulation 947PCMCIA Personal Computer Memory Card International Association 948PCP Port Control Protocol 949PD public domain 950PDA personal digital assistant 951PDA pushdown automaton 952PDAG propositional directed acyclic graph 953PDB power distribution board 954PDF portable document format 955PDM pulse-duration modulation 956PDN pull-down network 957PDP page {descriptor,directory} page 958PDS product data sheet 959PDU protocol data unit 960PE protection enable 961PEAP Protected EAP 962PECI platform environment control interface 963PEP protocol extension protocol 964PER packed encoding rules 965PFS perfect forward secrecy 966PGAS partitioned global address space 967PGE page global enable 968PGP Pretty Good Privacy 969PHB PCI host bridge 970PHP PHP: Hypertext Preprocessor 971PIC position independent code 972PIC programmable interrupt controller 973PICNIC problem in chair, not in computer 974PID process id 975PIE position independent executable 976PIL Priority Interrupt Level 977PIM personal information manager 978PIM platform-independent model 979PIO programmed input/output 980PIPT physically indexed, physically tagged 981PIQ prefetch input queue 982PIT programmable interrupt timer 983PIV personal identity verification 984PKCS public-key cryptography standards 985PKI public key infrastructure 986PLC programmable logic controller 987PLD programmable logic device 988PLL phase locked loop 989PLRU pseudo LRU 990PLTM package level thermal management 991PM power management 992PM {phase,pulse} modulation 993PME power management event 994PMI platform management interrupt 995PMIO port-mapped input/output 996PMT photo-multiplier tube 997PMU power management unit 998PNG portable network graphics 999PNP plug and play 1000POE power over ethernet 1001POF probability of failure 1002POP Post Office Protocol 1003POP power on password 1004POSIX Portable Operating System Interface [for Unix] 1005POST power on self test 1006POTS plain old telephone system 1007PP pair programming 1008PPB PCI [to] PCI bridge 1009PPC PowerPC 1010PPI pixels per inch 1011PPM pages per minute 1012PPP Point-to-Point Protocol 1013PPPOA Point-to-Point Protocol over ATM 1014PPPOE Point-to-Point Protocol over Ethernet 1015PPU physics processing unit 1016PRBS pseudorandom bit sequence 1017PRG pseudorandom generator 1018PRF pseudorandom function [family] 1019PRML partial response, maximum likelihood 1020PRN pseudorandom {noise,number} 1021PRNG pseudorandom number generator 1022PROM programmable read only memory 1023PRP pseudorandom permutation 1024PSD power spectral density 1025PSE page size extensions 1026PSK phase shift keying 1027PSK pre-shared key 1028PSTN public switched telephone network 1029PSW program status word 1030PTE page table entry 1031PTLA pseudo top level aggregator 1032PTP page table page 1033PTV perceived target value 1034PU processing unit 1035PUN physical unit number 1036PV physical volume 1037PVG physical volume group 1038PVI protected-mode virtual interrupt 1039PVST Per-VLAN Spanning Tree 1040PWM pulse width modulation 1041PXE preboot execution environment 1042QA quality assurance 1043QAM quadrature amplitude modulation 1044QAM quality assurance management 1045QBE query by example 1046QC quality control 1047QDI quasi delay insensitive 1048QOS quality of service 1049QVL qualified vendor list 1050R/O read only 1051R/W read/write 1052RA receiver address 1053RA remote assistance 1054RA resource affinity 1055RA router advertisement 1056RAD rapid application development 1057RAID redundant array of {independent,inexpensive} disks 1058RAM random access memory 1059RAS reliability, availability and serviceability 1060RAS remote access service 1061RAS restartable atomic sequence 1062RAS row address strobe 1063RBF radial basis function 1064RBT red-black tree 1065RC release candidate 1066RC remote control 1067RCS Revision Control System 1068RCS revision control system 1069RCU read, copy, update 1070RDB Rigid Disk Block 1071RDBMS relational database management system 1072RDF Resource Description Framework 1073RDM relational data model 1074RDMA remote direct memory access 1075RE regular expression 1076REST representational state transfer 1077RF radio frequency 1078RFI radio frequency interference 1079RFO request for ownership 1080RGB red green blue 1081RGBA red green blue alpha 1082RGMII reduced gigabit media independent interface 1083RH read hit 1084RHEL Red Hat Enterprise Linux 1085RHL Red Hat Linux 1086RIB routing information base 1087RIFF Resource Interchange File Format 1088RIP Routing Information Protocol 1089RIR regional Internet registry 1090RISC reduced instruction set {computer,computing} 1091RKM ROM Kernel Manual 1092RLE run length encoding 1093RLL run length limited 1094RLO right-to-left override 1095RM read miss 1096RMI remote method invocation 1097RMO Relaxed Memory Ordering 1098RMPM rapid memory power management 1099RMS root mean square 1100RMW read, modify, write 1101RNG random number generator 1102ROM read only memory 1103RPC remote procedure call 1104RPKI resource PKI 1105RPL requested privilege level 1106RPM revolutions per minute 1107RPN reverse Polish notation 1108RPVST Rapid Per-VLAN Spanning Tree 1109RR random replacement 1110RR round robin 1111RS relay station 1112RSA Rivest, Shamir, [and] Adleman 1113RSIP Realm Specific IP 1114RSN Robust Secure Network 1115RSS really simple syndication 1116RSS residual sum of squares 1117RSTP Rapid Spanning Tree Protocol 1118RT real time 1119RTC real time clock 1120RTC real time computing 1121RTF rich text format 1122RTL register transfer language 1123RTL resistor-transistor logic 1124RTL right to left 1125RTOS real time operating system 1126RTS request to send 1127RTT round trip time 1128RUP rational unified process 1129RW Rabin-Williams 1130RWM read-write memory 1131RX {receive,receiver} 1132S/PDIF Sony/Philips Digital Interface Format 1133SA security advisory 1134SA security association 1135SA source address 1136SA structured analysis 1137SAAS software as a service 1138SACD super audio compact disc 1139SAD security association database 1140SAL system abstraction layer 1141SAM serial access memory 1142SAM sum addressed memory 1143SAN storage area network 1144SAP service access point 1145SAPIC streamlined advanced programmable interrupt controller 1146SASD structured analysis, structured design 1147SASI Shugart Associates System Interface 1148SASL simple authentication [and] security layer 1149SATA serial advanced technology attachment 1150SB sound blaster 1151SBU standard build unit 1152SC store conditional 1153SCA source code analyzer 1154SCADA supervisory control and data acquisition 1155SCC single chip cloud 1156SCC source code control 1157SCCS Source Code Control System 1158SCI scalable coherent interface 1159SCI system control interrupt 1160SCM software configuration management 1161SCM source code management 1162SCM storage-class memory 1163SCP secure copy 1164SCSI Small Computer System Interface 1165SCTP Stream Control Transmission Protocol 1166SDI symbol deinterleave 1167SDK software development kit 1168SDL Simple Declarative Language 1169SDL Simple Direct-media Layer 1170SDLC {software,system,systems} development life cycle 1171SDN software defined networking 1172SDRAM synchronous dynamic random access memory 1173SDS software defined storage 1174SDT syntax-directed translation 1175SEGV segmentation violation 1176SEO search engine optimization 1177SFC sequential function chart 1178SFI simple firmware interface 1179SFI software fault isolation 1180SFTP SSH File Transfer Protocol 1181SFTP Serial File Transfer Protocol 1182SFTP Simple File Transfer Protocol 1183SGMII serial gigabit media independent interface 1184SGRAM synchronous graphics random access memory 1185SHA secure hash algorithm 1186SIDH supersingular isogeny Diffie-Hellman 1187SIEM security information and event management 1188SIFS short inter-frame space 1189SIMD single instruction, multiple data 1190SIMM single inline memory module 1191SIP Session Initiation Protocol 1192SIR signal-to-interference ratio 1193SIR slow infrared 1194SISD single instruction, single data 1195SLC single-level cell 1196SLDRAM synchronous-link dynamic random access memory 1197SLED single large expensive disk 1198SLI scalable link interface 1199SLI scan-line interleave 1200SLOC source lines of code 1201SLRU segmented LRU 1202SMA smart memory access 1203SMAF system management action field 1204SMAP Simple Mail Access Protocol 1205SMAP supervisor mode access prevention 1206SMART self-monitoring analysis and reporting technology 1207SMBIOS System Management BIOS 1208SMC system management controller 1209SMEP supervisor mode execution protection 1210SMF single mode fiber 1211SMI structure of management information 1212SMI system management interrupt 1213SMM system management mode 1214SMP symmetric multiprocessing 1215SMT simultaneous multithreading 1216SMTP Simple Mail Transfer Protocol 1217SMU system management unit 1218SNAP Sub-Network Access Protocol 1219SNMP Simple Network Management Protocol 1220SNR signal-to-noise ratio 1221SOA service oriented architecture 1222SOAP Simple Object Access Protocol 1223SOC system on chip 1224SOF start of frame 1225SOH start of header 1226SOHO small office/home office 1227SOL serial over LAN 1228SP service pack 1229SP stack pointer 1230SPARC scalable processor architecture 1231SPARQL SPARQL Protocol and RDF Query Language 1232SPD security policy database 1233SPD serial presence detect 1234SPDIF Sony/Philips digital interface format 1235SPI serial peripheral interface 1236SPI stateful packet inspection 1237SPL system interrupt priority level 1238SPL spinlock 1239SPMD single process, multiple data 1240SPR special purpose register 1241SPT sectors per track 1242SQA software quality assurance 1243SQL Structured Query Language 1244SRAM static random access memory 1245SRC sample rate conversion 1246SS self-snoop 1247SS stack segment 1248SSA static single assignment 1249SSAP source service access point 1250SSB single-sideband modulation 1251SSD solid state drive 1252SSE streaming SIMD extensions 1253SSFDC solid state floppy disc card 1254SSH secure shell 1255SSI server side includes 1256SSID service set identifier 1257SSL secure sockets layer 1258SSP stack smashing protection 1259STC software thermal control 1260STD state transition diagram 1261STP Spanning Tree Protocol 1262STP shielded twisted pair 1263SUS Single Unix Specification 1264SUT system under test 1265SVG scalable vector graphics 1266SVGA Super Video Graphics Array 1267SVM secure virtual machine 1268SVM support vector machine 1269SVR System V Release 1270SVS Separate Virtual Space 1271SWF Shockwave Flash 1272SWIG simplified wrapper [and] interface generator 1273SYR symbol timing recovery 1274TA test assertion 1275TA transmitter address 1276TAI international atomic time 1277TAO track at once 1278TAOCP The Art of Computer Programming 1279TAP Test Anything Protocol 1280TAS test and set 1281TB terabyte 1282TCB trace capture buffer 1283TCB trusted computing base 1284TCC thermal control circuit 1285TCL tool command language 1286TCP Transmission Control Protocol 1287TCQ tagged command queueing 1288TDC time [to] digital converter 1289TDD test driven development 1290TDD time division duplex 1291TDM time division multiplexing 1292TDMA time division multiple access 1293TDOA time difference of arrival 1294TDP thermal design {point,power} 1295TECO Text Editor and Corrector 1296TFT thin film transistor 1297TFTP Trivial File Transfer Protocol 1298TIAS try it and see 1299TIFF tagged image file format 1300TITS try it to see 1301TK temporal key 1302TKIP Temporal Key Integrity Protocol 1303TLA top level aggregator 1304TLB translation lookaside buffer 1305TLD top level domain 1306TLS thread local storage 1307TLS transport layer security 1308TM Turing machine 1309TM thermal monitor 1310TMDS transition minimized differential signaling 1311TMO timeout 1312TOD time of day 1313TOS terms of service 1314TOS trusted operating system 1315TOS type of service 1316TP transaction processing 1317TPI tracks per inch 1318TPM transactions per minute 1319TPM trusted platform module 1320TPR task priority register 1321TPS transactions per second 1322TPS transmission parameters signaling 1323TR task register 1324TR token ring 1325TRL timing recovery loop 1326TRNG true random number generator 1327TS terminal services 1328TS time series 1329TS time stamp 1330TS transport stream 1331TSC time stamp counter 1332TSD time stamp disable 1333TSL test, set, lock 1334TSO time sharing option 1335TSO Total Store Ordering 1336TSP Time-Stamp Protocol 1337TSP Tunnel Setup Protocol 1338TSP time synchronization protocol 1339TSP traveling salesman problem 1340TSS task state segment 1341TTL time to live 1342TTL transistor-transistor logic 1343TTM translation table maps 1344TTY teletype 1345TUI {terminal,text-based,textual} user interface 1346TX {transmit out,transmitter} 1347TZ time zone 1348UAC user {access,account} control 1349UAF use-after-free 1350UART universal asynchronous receiver/transmitter 1351UAT user acceptance testing 1352UB undefined behavior 1353UC uncacheable 1354UCS uniform-cost search 1355UDMA ultra DMA 1356UDO ultra density optical 1357UDP User Datagram Protocol 1358UEFI unified extensible firmware interface 1359UFS Unix File System 1360UGA universal graphics adapter 1361UI unit interval 1362UI user interface 1363UID unique identifier 1364UID user identifier 1365UL upload 1366UMA uniform memory access 1367UMA upper memory area 1368UMB upper memory block 1369UML unified modeling language 1370UMPC ultra-mobile PC 1371UPNP universal plug and play 1372UPS uninterruptible power supply 1373URI uniform resource identifier 1374URL uniform resource locator 1375URN uniform resource name 1376USART universal synchronous/asynchronous receiver/transmitter 1377USB universal serial bus 1378USWC uncacheable speculative write combining 1379UT unit test 1380UTC coordinated universal time 1381UTP unshielded twisted pair 1382UUCP Unix-to-Unix Copy Protocol 1383UUID universally unique identifier 1384UUOC useless use of cat 1385UUT unit under test 1386UX user experience 1387VA vertical alignment 1388VA virtual address 1389VA volt-ampere 1390VAX virtual address extension 1391VB Visual Basic 1392VCA variable-gain amplifier 1393VCC common collector voltage 1394VCF voltage-controlled filter 1395VCM virtual channel memory 1396VCO voltage-controlled oscillator 1397VCS version control system 1398VESA Video Electronics Standards Association 1399VFO variable-frequency oscillator 1400VG volume group 1401VGA Video Graphics Array 1402VHDCI very high density cable interconnect 1403VID voltage level identifier 1404VIPT virtually indexed, physically tagged 1405VIVT virtually indexed, virtually tagged 1406VLAN virtual local area network 1407VLIW very long instruction word 1408VLSI very large scale integration 1409VLSM variable length subnet mask 1410VM virtual {machine,memory} 1411VME virtual mode extension 1412VMX vector multimedia extensions 1413VMX virtual machine extensions 1414VOD video on demand 1415VPN virtual private network 1416VR virtual reality 1417VRAM video random access memory 1418VRF virtual routing and forwarding 1419VRM voltage regulator module 1420VRRP Virtual Router Redundancy Protocol 1421VSTP VLAN Spanning Tree Protocol 1422VTP VLAN Trunking Protocol 1423W watt 1424W3C World Wide Web Consortium 1425WAN wide area network 1426WAP Wireless Application Protocol 1427WAP wireless access point 1428WDT watchdog timer 1429WEP Wired Equivalent Privacy 1430WFI wait for interrupt 1431WFQ weighted fair queuing 1432WH write hit 1433WIFI wireless fidelity 1434WLAN wireless local area network 1435WM write miss 1436WMI Windows Management Instrumentation 1437WOL Wake-on-LAN 1438WOM Wake-on-Modem 1439WOR Wake-on-Ring 1440WORM write once read many 1441WP WordPerfect 1442WP word processor 1443WP write protect 1444WPA Wi-Fi Protected Access 1445WPA2 Wi-Fi Protected Access II 1446WPS Wi-Fi Protected Setup 1447WRAM window random access memory 1448WS web services 1449WTC write through caching 1450WWAN wireless wide area network 1451WWW world wide web 1452WYSIWYG what you see is what you get 1453XBAR crossbar 1454XDMCP X Display Manager control protocol 1455XER XML encoding rules 1456XGA Extended Graphics Array 1457XIP execute in place 1458XML Extensible Markup Language 1459XOR exclusive or 1460XP extreme programming 1461XSI X/Open System Interface 1462XSL extensible stylesheet language 1463XSS cross site scripting 1464XT extended technology 1465XUL XML user interface language 1466YACC yet another compiler compiler 1467YAWPFAPR you are welcome; please file a problem report 1468YP Yellow Pages 1469YTD year to date 1470ZBR zone bit recording 1471ZFOD zero-filled on demand 1472ZIF zero insertion force 1473ZIFS zero insertion force socket 1474ZMA zone multicast address 1475