$NetBSD: acronyms.comp,v 1.127 2011/08/29 16:28:38 jruoho Exp $ 3WHS three-way handshake 8VSB 8-state vestigial side band modulation AA anti-aliasing AAA authentication, authorization, accounting AAT average access time ABI application binary interface ABR available bit rate AC alternating current ACI adjacent channel interferer ACID atomicity, consistency, isolation, durability ACK acknowledgement ACK Amsterdam compiler kit ACL access control list ACL active current loop ACP auxillary control {program, process} ACPI advanced configuration and power interface ACS access control set ACU automatic calling unit ADB Apple desktop bus ADC analog [to] digital converter ADD acronym driven development ADP automatic data processing ADT abstract data type ADO active data objects ADP automatic data processing ADPCM adaptive differential pulse code modulation ADS alternate data stream ADSL asymmetric digital subscriber line AES Advanced Encryption Standard AFS Andrew File System AGC automatic gain control AGP accelerated graphics port AI analog input AI artificial intelligence AL access list AL active link ALE address latch enable ALS ambient light sensor ALU arithmetic and logical unit AM access method AM amplitude modulation AM alignment mask AMI alternate mark inversion AMT active management technology AN Arabic number ANSI American National Standards Institute AO analog output AOL alert on LAN AOS add or subtract AP access point AP application processor API application programming interface APIC advanced programmable interrupt controller AQM active queue management ARAT always running APIC timer ARC adaptive replacement cache ARM Advanced RISC Machines ARP address resolution protocol ARPA Advanced Research Projects Agency ARQ automatic repeat request ARR address range register ARU audio response unit AS autonomous system ASC advanced smart cache ASCII American standard code for information interchange ASD agile software development ASE advanced software environment ASIC application-specific integrated circuit ASK amplitude shif keying ASLR address space layout randomization ASPM active state power management ASN autonomous system number ASQ automated software quality ASR address space register AST abstract syntax tree AST asynchronous trap AT access time AT advanced technology ATA advanced technology attachment ATAPI advanced technology attachment packet interface ATC address translation cache ATM asynchronous transfer mode ATX advanced technology extended AV anti virus AVL Adelson-Velsky-Landis AVX advanced vector extensions AWK Aho, Werner, and Kernighan BA byte align BAL basic assembly language BAR base address register BBS bulletin board system BCC blind carbon copy BCD binary coded decimal BCR byte counte register BCS base configuration space BD baud BDD binary decision diagram BDI bit deinterleave BDUF big design up front BEDO burst extended data output BER basic encoding rules BER bit error {rate, ratio} BFD binary {file, format} descriptor BFKL big fscking kernel lock BFS breadth-first search BFT binary file transfer BGA ball grid array BGP border gateway protocol BIND Berkeley Internet Name Daemon BIOS basic input/output system BIST built-in self-test BIU bus interface unit BKDG BIOS and kernel developer's guide BLAS basic linear algebra subprograms BLOB binary large object BLC back light control BM bus master BMC baseboard management controller BMIC bus master interface controller BN boundary neutral BNF Backus-Naur form BO binary output BOF beginning of file BOM byte order mark BOM beginning of message BP base pointer BP boot processor BPB BIOS parameter block BPF Berkeley packet filter BPI bits per inch BPM business process modelling BPS bits per second BPSK binary phase shift keying BQS Berkeley quality software BRE basic regular expression BS binary sequence BSD Berkeley software distribution BSF bit scan forward BSOD blue screen of death BSP binary space partition BSP bootstrap processor BSR bit scan reverse BSS block started by symbol BT Bluetooth BT BitTorrent BT bit test BTC bit test [and] complement BTR bit test [and] reset BTS bit test [and] set BTS bits per second BW bandwidth BWM block-write mode CA certificate authority CAD computer-aided design CAM computer assisted manufacturing CAM content addressable memory CAM conditional access module CARP common address redundancy protocol CAS (atomic) compare and swap CAS computer algebra system CAS column address strobe CASE computer aided software engineering CAU control access unit CAV constant angular velocity (as opposed to CLV) CBC cipher block chaining CBR constant bit rate CCD charge coupled device CCI co-channel interferer CC carbon coby CD compact disc CD cache disable CDDA compact disc digital audio CDMA code division multiple access CDRAM cache dynamic random access memory CER canonical encoding rules CF compact flash CFG context-free grammar CFG control-flow graph CG control gate CGA color graphics {array,adapter} CGI common gateway interface CHAP challenge-handshake authentication protocol CHS cylinder/head/sector CI {common, component} interface CI continuous integration CIDR classless inter-domain routing CIFS common internet file system CIL common intermediate language CIR carrier to interference ratio CIS contact image sensor CJK Chinese, Japanese, and Korean CLF common log format CLI command line interface CLR common language runtime CLTT closed loop thermal throttling CLUT color look-up table CLV constant linear velocity (as opposed to CAV) CM configuration management CMA concert multithread architecture CMI control management interface CMI control method interface CMOS complementary metal-oxide-semiconductor CMP chip multi-processing CMS content management system CMYK cyan magenta yellow black CN {common, canonical} name CNC computer numerical control CNR carrier to noise ratio COF current operating frequency COFDM coded orthogonal frequency division multiplexing COFF common object file format COM component object model COMA cache-only memory architecture CORBA common object request broker architecture COW copy-on-write CP continuous pilot CPB core performance boost CPE common phase error CPG clock pulse generator CPL current privilege level CPLD complex programmable logic device CPS characters per second CPT command pass through CPU central processing unit CR carriage return CRC cyclic redundancy check CRL carrier recovery loop CRLF carriage return line feed CRT cathode ray tube CS computer science CS cable select CS chip select CS code segment CSI common system interface CSI channel state information CSMA carrier sense multiple access CSMA/CA carrier sense multiple access with collision avoidance CSMA/CD carrier sense multiple access with collision detection CSR control [and] status registers CSS cascading style sheets CSV comma-separated values CTM close to metal CTS clear to send CUA common user access CUT coordinated universal time CV control voltage CVS concurrent versions system DA destination address DAA distributed application architecture DAB digital audio broadcasting DAC discretionary access control DAC digital [to] analog converter DAO disk at once DAP directory access protocol DAT digital audio tape DAT dynamic acceleration technology DB database DBA dynamic bandwidth allocation DBB data bus buffer DBC design by contract DBL dynamic buffer limiting DBMS database management system DBS database server DC direct current DCC direct client [to] client DCC direct cable connect DCD data carrier detect DCE data control equipment DCE distributed computing environment DCOM distributed component object model DCOP desktop communication protocol DCS data collection systems DCT discrete cosine transform DCU data cache unit DDC display data channel DDE dynamic data exchange DDK device driver kit DDL data description language DDR double data rate DDS direct digital sound DDWG digital display working group DE desktop environment DE debugging extensions DEA data encryption algorithm DEK data encryption key DEP data execution prevention DER distinguished encoding rules DES Data Encryption Standard DF don't fragment DFA deterministic finite automaton DFC data flow control DFS depth first search DFS distributed file system DFT discrete Fourier transform DFT diagnostic function test DGL data generation language DH Diffie-Hellman DHCP dynamic host configuration protocol DIFS distributed inter-frame space DIMM dual inline memory module DIRT design in real time DL download DL diode logic DLE data link escape DLL dynamic link library DMA direct memory access DMI desktop management interface DMS document management system DMT discrete multitone modulation DNARD Digital network appliance reference design DNS domain name system DOE distributed object environment DOF data over fibre DOM document object model DOS denial of service DOS disk operating system DPC deferred procedure call DPCM differential pulse code modulation DPD dead peer detection DPI dots per inch DPI deep packet inspection DPL descriptor privilege level DPST display power savings technology DRAM dynamic random access memory DRI direct rendering infrastructure DRM digital rights management DRRS display refresh rate switching DS debug store DSB double-sideband modulation DSDT differentiated system descriptor table DSL digital subscriber line DSL domain specific language DSLAM digital subscriber line access multiplexer DSN delivery status notification DSO dynamic shared object DSP digital signal processor DSSS direct sequence spread spectrum DTD document type definition DTE data terminal equipment DTE dumb terminal emulator DTL diode-transistor logic DTS digital thermal sensor DUT device under test DVB digital video broadcasting DVCS distributed version control system DVD digital versatile disc DVFS dynamic voltage and frequency scaling DVR digital video recorder DVI digital visual interface E-XER extended XML encoding rules EABI embedded-application binary interface EAP extensible authentication protocol EBR extended boot record ECC error correction code ECL emitter-coupled logic ECN explicit congestion notification ECP enhanced capability port ECS enhanced chip set ECS extended configuration space EDAT enhanced dynamic acceleration technology EDGE explicit data graph execution EDID extended display identification data EDO extended data out EDS electronical data sheet EEPROM electrically erasable programmable read only memory EFI extensible firmware interface EFL emitter follower logic EFM eight to fourteen modulation EGA enhanced graphics {array,adapter} EGP exterior gateway protocol EH extension header EIDE enchanced IDE EISA extended industry standard architecture ELF executable and linking format ELS entry level system EMI electro-magnetic interference EMP electro-magnetic pulse EMR electro-magnetic radiation EOF end of file EOI end of interrupt EOL end of line EOL end of life EOT end of transmission EPIC explicitly parallel instruction computing EPP enhanced parallel port EPRML extended partial response, maximum likelihood EPROM erasable programmable read only memory ERD emergency recovery disk ERE extended regular expression ESDRAM enhanced synchronous dynamic random access memory ESS electronic switching system EST enhanced speedstep ETL extract, transform, load EU execution unit EULA end user license agreement FAT file allocation table FBRAM frame buffer random access memory FCL fiber channel loop FCFS first come, first served FCS frame check sequence FDC floppy disk controller FDD floppy disk drive FDDI fiber distributed data interface FDE full disk encryption FEA finite element analysis FEC forward error correction FET field-effect transistor FFH functional fixed hardware FFI foreign function interface FFM focus follows mouse FFS fast file system FFS find first set FFT fast Fourier transform FG floating gate FHSS frequency hop spread spectrum FID frequency identifier FIFO first in, first out FILO first in, last out FIR fast infrared FLOPS floating [point] operations per second FLOSS free / libre / open source software FM frequency modulation FMR false match rate FOSS free / open source software FPGA field programmable gate array FPM fast page mode FPR floating point register FPU floating point unit FQDN fully qualified domain name FRR false rejection rate FRU field replaceable unit FS file system FSB front side bus FSCK file system check FSK frequency shift keying FSM finite-state machine FTA fault tree analysis FTP file transfer protocol FTPS file transfer protocol, secure FUS fast user switching FWH firmware hub FWS folding white space GAL generic array logic GAS generic address structure GC garbage collector GCR group-coded recording GDT global descriptor table GEM graphics execution manager GEM graphics environment manager GENA general event notification architecture GHC Glasgow Haskell compiler GID group identifier GIF graphics interchange format GMCH graphics and memory controller hub GNU GNU's not Unix GOT global offset table GPE general purpose event GPF general protection fault GPL GNU/general public license GPR general purpose register GPS generalized processor sharing GPT GUID partition table GPU graphics processing unit GR golden ratio GRE generic routing encapsulation GSI global system interrupt GUI graphics user interface GUID globally unique identifier HA high availability HAL hardware abstraction layer HAT hashed array tree HBA host bus adapter HCI host controller interface HCI human-computer interaction HCL hardware compatibility list HCF halt and catch fire HDD hard disk drive HDCP high-bandwidth digital content protection HDL hardware description language HDTV high-definition television HF high frequency HFM highest frequency mode HID human interface device HLL high-level language HMA high memory area HMI human-machine interface HP Hewlett-Packard HOOD hierarchical object oriented design HPC high performance computing HPET high precision event timer HT hyper-threading HTC hardware thermal control HTCC high temperature co-fired ceramic HTML hyper-text markup language HTT hyper-threading technology HTTP hyper-text transfer protocol HTTPS hyper-text transfer protocol, secure HVM hardware virtual machine HZ Hertz I2O intelligent input/output IA information assurance IANA Internet assigned numbers authority IBC iterated block cipher IBM International Business Machines IBS instruction based sampling ICA independent computer architecture IC integrated circuit ICB Internet citizen's band ICE in-circuit emulator ICH I/O controller hub ICE internal compiler error ICE in-circuit emulator ICMP Internet control message protocol ICT information and communications technology ICW initialization command word IDA Intel dynamic acceleration IDE integrated drive electronics IDE integrated development environment IDPS intrusion detection [and] prevention system IDRP inter-domain routing protocol IDS intrusion detection system IDT interrupt descriptor table IE Internet Explorer IEC international electrotechnical commission IEEE Institute [of] Electrical [and] Electronics Engineers IESG Internet Engineering Steering Group IETF Internet Engineering Task Force IF intermediate frequency IFCM isochronous flow control mode IGD Internet gateway device IGMP Internet group management protocol IGP interior gateway protocol IHV independent hardware vendor IKE Internet key exchange ILM internal loopback mode ILP instruction level parallelism IM instant messaging IMC integrated memory controller IMCR interrupt mode configuration register IMAP Internet mail access protocol IMR interrupt mask register IMS information management system INCITS international committee on information technology standards IO input/output IOCTL input/output control IOMMU input/output memory management unit IP Internet Protocol IP intellectual property IPC interprocess communication IPE integrated programming environment IPI interprocessor interrupt IPNG Internet protocol, next generation IPS intrusion prevention system IPS in-plane switching IPSEC Internet protocol security IRC Internet relay chat IRDA infrared data association IRQ interrupt request IRQL interrupt request level IRR interrupt request register IRTF Internet research task force IS information system ISA industry standard architecture ISA instruction set architecture ISDN integrated services digital network ISI inter-symbol interference ISM industrial, scientific and medical ISN initial serial number ISO international standards organization ISOC Internet society ISP Internet service provider ISR interrupt service routine ISR in-service register IST interrupt stack table ISV independent software vendor IT information technology ITB Intel turbo boost IV initialization vector IVT interrupt vector table JBOD just a bunch of disks JFET junction [gate] field-effect transistor JIT just in time JPEG joint photographic experts group JRE Java runtime environment JTAG joint test action group KB keyboard KB kilobyte KBD keyboard KBD kilobaud KLOC thousand lines of code KMS kernel-mode setting KPI kernel programming interface KVA kernel virtual address KVM kernel virtual memory KVM keyboard, video, mouse switch LAMP Linux Apache MySQL {Perl,PHP,Python} LAN local area network LAPIC local advanced programmable interrupt controller LAR load access rights LBA logical block addressing LBS location-based service LCD liquid crystal display LCP link control protocol LDA local delivery agent LDAP lightweight directory access protocol LDR light-dependent resistor LDT local descriptor table LE logical extent LED light emitting diode LER label edge router LF line feed LF low frequency LFM lowest frequency mode LFN long file names LFO low-frequency oscillation LFS log-structured file system LFU least frequently used LHP loop heat pipe LIFO last in, first out LILO last in, last out LILO Linux loader LINT local interrupt LIR local Internet registry LKM {Linux, loadable} kernel module LKML Linux kernel mailing list LL load linked LL/SC load linked / store conditional LLC logical link control LLF low level format LLMNR link-local multicast name resolution LLVM Low Level Virtual Machine LM long mode LMM link management mode LNO loop nest optimization LOC lines of code LPC low pin count LPS local positioning system LRC longitudinal redundancy check LRM left-to-right mark LRO left-to-right override LRU least recently used LSB least significant bit [or: byte] LSB Linux standards base LSI large scale integration LSL load segment limit LSR label switch router LTCC low temperature co-fired ceramic LTR left to right LTR load task register LUN logical unit number LV logical volume LVM logical volume management LVT local vector table LWP light-weight process LZW Lempel Ziv Welch MAC medium access control MAC mandatory access control MADT multiple APIC descriptor table MB megabyte MBR master boot record MBS megabits per second MC memory controller MCA machine check architecture MCC multiversion concurrency control MCE machine check exception MCGA multicolor graphics adapter MCH memory controller hub MCM multi-chip module MCQ memory controlled queue MD machine-dependent MDA mail delivery agent MDA monochrome display adapter MDRAM multibank dynamic random access memory MESI modified, exclusive, shared, invalid MFC merge from current MFM modified frequency modulation MI machine-independent MIB management information base MID mobile internet device MIDI musical instrument digital interface MIF management information format MIMD multiple instruction stream, multiple data stream MIME multipurpose Internet mail extensions MIMO multiple input multiple output MIPS million instructions per second MISD multiple instruction, single data MIT Massachusetts Institute of Technology ML mailing list ML machine language ML machine learning ML markup language ML maximum likelihood MLC multi-level cell MLHP micro loop heat pipe MMIC monolithic microwave integrated circuit MMIO memory mapped input/output MMU memory management unit MMX multimedia extension MMX multiple math extension MMX matrix math extension MO magneto-optical MOESI modified, owned, exclusive, shared, invalid MOF maximum operating frequency MOSFET metal-oxide-semiconductor field-effect transistor MOSI modified, owned, shared, invalid MP multiprocessor MP multiprocessing MP multi-platform MP multiplayer MPEG moving picture experts group MPI message passing interface MPLS multiprotocol label switching MPP massively parallel processor MPS multiprocessor specification MPS memory pool system MR modem ready MRU most recently used MS Microsoft MSB most significant bit [or: byte] MSE mean square error MSF minutes seconds frames MSI message signaled interrupt MSI modified, shared, invalid MSR machine state register MSS maximum segment size MT machine translation MTA mail transfer agent MTBF mean time between failures MTRR memory type range register MTTF mean time to failure MTU maximum transmission unit MUA mail user agent MUD multi-user domain MVCC multiversion concurrency control MWE module width encoding MX mail exchange NACK negative acknowledgement NAN not a number NAS network attached storage NAT network address translation NAV network allocation vector NC numerical control NCO numerically-controlled oscillator NCP network control protocol NCQ native command queuing ND neighbor discovery NE numeric error NFA nondeterministic finite automaton NFS network file system NIA next instruction address NIC network interface card NIP network interface protocol NIS network information service NLS native language support NMI non-maskable interrupt NNTP network news transfer protocol NOP no operation NP nondeterministic polynomial time NRZ non-return to zero NSA National Security Agency NTM non-deterministic Turing machine NTP network time protocol NUMA non-uniform memory access NVRAM non-volatile random access memory NW not write-through NX no execute OAEP optimal asymmetric encryption padding OBO off by one OBOE off by one error OCL object constraint language OCR optical character recognition ODCM on-demand clock modulation ODT on-die termination OEM original equipment manufacturer OFDM orthogonal frequency division multiplexing OFET organic field-effect transistor OLE object linking and embedding ONFI open nand flash interface OO object oriented OO OpenOffice OOB out of band OOE out of order execution OOM out of memory OOP object oriented programming OOSE object oriented software engineering OPS operations per second OPM operations per minute OQL object query language ORM object-relational mapping OS operating system OSD open source definition OSF open software foundation OSI open systems interconnection OSI open-source initiative OSPF open shortest path first OSPM OS power management OSS open source software OSS open sound system OSVW operating system visible workarounds OTP one time password OU organizational unit OUI organizationally unique identifier OWL Web ontology language P2P peer to peer P2P PCI to PCI PA physical address PA phase accumulator PAC phase-amplitude converter PAE physical address extension PAL programmable array logic PAL phase alternating line PAM pluggable authentication modules PAM pulse amplitude modulation PAP password authentication protocol PAT page attribute table PAT port address translation PATA parallel ATA PAX portable archive exchange PBE pending break encoding PBE programming by example PC personal computer PC program counter PCB printed circuit board PCC Portable C Compiler PCD page-level cache disable PCE performance-monitor counter enable PCI peripheral component interconnect PCM phase change memory PCM pulse code modulation PCMCIA personal computer memory card international association PD public domain PDA personal digital assistant PDA pushdown automaton PDAG propositional directed acyclic graph PDB power distribution board PDF portable document format PDM pulse-duration modulation PDN pull-down network PDP page descriptor page PDS product data sheet PDU protocol data unit PE protection enable PECI platform environment control interface PEP protocol extension protocol PER packed encoding rules PERL practical extraction [and] report language PFS perfect forward secrecy PGAS partitioned global address space PGE page global enable PGP pretty good privacy PHB PCI host bridge PIC programmable interrupt controller PIC position independent code PID process id PIE position independent executable PIM personal information manager PIM platform-independent model PIN personal identification number PIO programmed input/output PIPT physically indexed, physically tagged PIQ prefetch input queue PIT programmable interrupt timer PIV personal identity verification PKI public key infrastructure PKCS public-key cryptography standards PLC programmable logic controller PLD programmable logic device PLL phase locked loop PLRU pseudo LRU PLTM package level thermal management PM power management PM {phase, pulse} modulation PME power management event PMI platform management interrupt PMIO port-mapped input/output PMT photo-multiplier tube PMU power management unit PNG portable network graphics PNP plug and play POE power over ethernet POF probability of failure POP post office protocol POP power on password POSIX portable operating system interface [for] Unix POST power on self test POTS plain old telephone system PP pair programming PPC PowerPC PPB PCI [to] PCI bridge PPI pixels per inch PPM pages per minute PPP point-to-point protocol PPPOA point-to-point protocol over ATM PPPOE point-to-point protocol over ethernet PPU physics processing unit PRBS pseudo-random bit sequence PRML partial response, maximum likelihood PRN pseudo random {number, noise} PRNG pseudo random number generator PROM programmable read only memory PSD power spectral density PSE page size extensions PSK pre-shared key PSK phase shift keying PSTN public switched telephone network PSW program status word PTE page table entry PTLA pseudo top level aggregator PTP page table page PTV perceived target value PU processing unit PUN physical unit number PV physical volume PVG physical volume group PVI protected-mode virtual interrupt PWM pulse width modulation PXE preboot execution environment QA quality assurance QAM quality assurance management QAM quadrature amplitude modulation QBE query by example QC quality control QDI quasi delay insensitive QOS quality of service RA receiver address RA remote assistance RA router advertisement RA resource affinity RAD rapid application development RAID redundant array of inexpensive disks RAM random access memory RAS restartable atomic sequence RAS remote access service RAS row address strobe RBF radial basis function RBT red-black tree RC release candidate RC remote control RCS revision control system RCU read, copy, update RDF resource description format RDM relational data model RDMA remote direct memory access RE regular expression REST representational state transfer RF radio frequency RFI radio frequency interference RFO request for ownership RGB red green blue RH read hit RHL Red Hat Linux RIB routing information base RIFF Resource Interchange File Format RIP routing information protocol RIR regional Internet registry RISC reduced instruction set computing RKM ROM Kernel Manual RLE run length encoding RLL run length limited RLO right-to-left override RM read miss RMI remote method invocation RMPM rapid memory power management RMS root mean square RMW read, modify, write RNG random number generator ROM read only memory RPC remote procedure call RPL requested privilege level RPM revolutions per minute RR round robin RR random replacement RS relay station RSA Rivest, Shamir and Adleman RSS really simple syndication RSS residual sum of squares RT real time RTC real time clock RTC real time computing RTF rich text format RTL resistor-transistor logic RTOS real time operating system RTS {ready, request} to send RTT round time trip RUP rational unified process RWM read-write memory RX receive, receiver S/PDIF Sony/Phillips digital interface SA security advisory SA security association SA source address SA structured analysis SAAS software as a service SACD super audio compact disc SAD security association database SAL system abstraction layer SAM serial access memory SAM sum addressed memory SAN storage area network SAPIC streamlined advanced programmable interrupt controller SASD structured analysis, structured design SASI shugart associates system interface (predecessor to SCSI) SASL simple authentication [and] security layer SATA serial advanced technology attachment SB sound blaster SBU standard build unit SC store conditional SCA source code analyzer SCADA supervisory control and data acquisition SCC single chip cloud SCC source code control SCCS source code control system SCM software configuration management SCM source code management SCP secure copy SCI system control interrupt SCI scalable coherent interface SCSI small computer system interface SCTP stream control transmission protocol SDI symbol deinterleave SDK software development kit SDL simple declarative language SDRAM synchronous dynamic random access memory SDT syntax-directed translation SEGV segmentation violation SFI simple firmware interface SFC sequential function chart SGRAM synchronous graphics random access memory SIFS short inter-frame space SIMD single instruction, multiple data SIMM single inline memory module SIP session initiation protocol SIR slow infrared SISD single instruction, single data SLC single-level cell SLDRAM synchronous-link dynamic random access memory SLI scalable link interface SLI scan-line interleave SLOC source lines of code SLRU segmented LRU SMA smart memory access SMAF system management action field SMART self-monitoring analysis and reporting technology SMBIOS system management BIOS SMC system management controller SMI system management interrupt SMI structure of management information SMM system management mode SMP symmetric multiprocessing SMT simultaneous multithreading SMTP simple mail transfer protocol SMU system management unit SNMP simple network management protocol SNR signal [to] noise ratio SOA service oriented architecture SOAP simple object access protocol SOC system on chip SOF start of frame SOHO small office / home office SOL serial over LAN SP stack pointer SP service pack SPARC scalable processor architecture SPARQL SPARQL protocol and RDF query language SPD security policy database SPD serial presence detect SPI serial peripheral interface SPI stateful packet inspection SPMD single process, multiple data SPR special purpose register SPT sectors per track SQA software quality assurance SQL structured query language SRAM static random access memory SRC sample rate conversion SS stack segment SS self-snoop SSB single-sideband modulation SSD solid state drive SSE streaming SIMD extensions SSFDC solid state floppy disc card SSH secure shell SSI server side includes SSL secure sockets layer SSP stack smashing protection STC software thermal control STD state transition diagram STP shielded twisted pair STP spanning-tree protocol SUS Single Unix Specification SUT system under test SVG scalable vector graphics SVGA super video graphics {array,adapter} SVM secure virtual machine SVM support vector machine SVR System V Release SWF Shockwave Flash SWIG simplified wrapper [and] interface generator SYR symbol timing recovery TA transmitter address TA test assertion TAI international atomic time TAO track at once TAOCP The Art of Computer Programming TAP test anywhere protocol TAS test and set TB terabyte TCB trace capture buffer TCB trusted computing base TCC thermal control circuit TCL tool command language TCP transmission control protocol TCQ tagged command queueing TDC time [to] digital converter TDD test driven development TDD time division duplex TDM time division multiplexing TDMA time division multiple access TDOA time difference of arrival TDP thermal design {point, power} TECO Text Editor and Corrector TFT thin film transistor TFTP trivial file transfer protocol TIAS try it and see TIFF tagged image file format TITS try it to see TK temporal key TLA top level aggregator TLB transition lookaside buffer TLD top level domain TLS transport layer security TLS thread local storage TM Turing machine TM thermal monitor TMDS transition minimized differential signaling TMO timeout TOD time of day TOS terms of service TOS type of service TOS trusted operating system TP transaction processing TPM trusted platform module TPM transactions per minute TPR task priority register TPS transmission parameters signaling TR token ring TR task register TRL timing recovery loop TRNG true random number generator TS time stamp TS time series TS transport stream TS terminal services TSC time stamp counter TSD time stamp disable TSL test, set, lock TSO time sharing option TSP time stamp protocol TSP time synchronization protocol TSP tunnel setup protocol TSP traveling salesman problem TSS task state segment TTL time to live TTL transistor-transistor logic TTM translation table maps TTY teletype TX transmit out, transmitter TZ time zone UAC user {account, access} control UART universal asynchronous receiver/transmitter UAT user acceptance testing UC uncacheable UCS uniform-cost search UDMA ultra DMA UDO ultra density optical (storage) UDP user datagram protocol UFS Unix file system UI user interface UI unit interval UID user identifier UID unique identifier UL upload UMA uniform memory access UMA upper memory area UMB upper memory block UMPC ultra-mobile PC UML unified modeling language UPNP universal plug and play UPS uninterruptible power supply URI uniform resource identifier URL uniform resource locator URN uniform resource name USART universal synchronous/asynchronous receiver/transmitter USB universal serial bus USWC uncacheable speculative write combining UT unit test UTC coordinated universal time UTP unshielded twisted pair UUCP Unix-to-Unix copy protocol UUID universally unique identifier UUOC useless use of cat UUT unit under test VA volt-ampere VA virtual address VA vertical alignment VAX virtual address extension VB Visual Basic VCA variable-gain amplifier VCC common collector voltage VCF voltage-controlled filter VCM virtual channel memory VCO voltage-controlled oscillator VCS version control system VESA video electronics standards association VFO variable-frequency oscillator VG volume group VGA video graphics {array,adapter} VHDCI very high density cable interconnect VID voltage level identifier VIPT virtually indexed, physically tagged VIVT virtually indexed, virtually tagged VLAN virtual local area network VLIW very long instruction word VLSI very large scale integration VLSM variable length subnet mask VOD video on demand VM virtual {machine,memory} VME virtual mode extension VMX virtual machine extensions VMX vector multimedia extensions VPN virtual private network VR virtual reality VRAM video random access memory VRM voltage regulator module VRRP virtual router redundancy protocol W Watt W3C World Wide Web Consortium WAN wide area network WAP wireless application protocol WEP wired equivalent privacy WFI wait for interrupt WFQ weighted fair queuing WH write hit WIFI wireless fidelity WLAN wireless local area network WDT watchdog timer WM write miss WMI Windows management instrumentation WOL wake on LAN WOR wake on ring WORM write once read many WP write protect WP word processor WP WordPerfect WPA wi-fi protected access WRAM window random access memory WS web services WTC write through caching WWAN wireless wide area network WWW world wide web WYSIWYG what you see is what you get XBAR crossbar XER XML encoding rules XGA extended graphics {array,adapter} XIP execute in place XML extensible markup language XOR exclusive or XP extreme programming XSL extensible stylesheet language XSS cross site scripting XT extended technology XUL XML user interface language YACC yet another compiler compiler YAWPFAPR you are welcome; please file a problem report YP yellow pages (aka NIS) YTD year to date ZBR zone bit recording ZFOD zero-filled on demand ZIF zero insertion force ZIFS zero insertion force socket ZMA zone multicast address