$NetBSD: acronyms.comp,v 1.190 2018/01/30 22:45:12 ginsbach Exp $ 3WHS three-way handshake 8VSB 8-state vestigial side band modulation AA anti-aliasing AAA authentication, authorization, [and] 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 Amsterdam compiler kit ACK acknowledgement ACL access control list ACL active current loop ACP auxillary control {process,program} 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 ADO active data objects ADP automatic data processing ADPCM adaptive differential pulse code modulation ADS alternate data stream ADSL asymmetric digital subscriber line ADT abstract data type 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 ALUA asymmetric logical unit access AM access method AM alignment mask AM amplitude modulation AMI alternate mark inversion AMP asymmetric multiprocessing AMQP advanced message queuing protocol 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 APIPA automatic private IP addressing APT advanced persistent threat 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 ASN autonomous system number ASPM active state power management 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 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 count 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 BGPSEC BGP Security BIND Berkeley Internet Name Daemon BIOS Basic Input/Output System BIOS built-in operating system BIST built-in self-test BIU bus interface unit BKDG BIOS and kernel developer's guide BLAS basic linear algebra subprograms BLC back light control BLOB binary large object 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 beginning of message BOM byte order mark BP base pointer BP boot processor BPB BIOS parameter block BPDU bridge protocol data unit 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 backspace BS binary sequence BSA basic service area BSD Berkeley Software Distribution BSF bit scan forward BSOD blue screen of death BSP binary space partition BSP board support package BSP bootstrap processor BSR bit scan reverse BSS basic service set BSS block started by symbol BSSID basic service set identifier BT BitTorrent BT Bluetooth BT bit test BTC bit test [and] complement BTR bit test [and] reset BTS bit test [and] set BTS bug tracking system BW bandwidth BWM block-write mode CA certificate authority CAD computer-aided design CAM computer assisted manufacturing CAM conditional access module CAM content addressable memory CARP Common Address Redundancy Protocol CAS column address strobe CAS compare and swap CAS computer algebra system CASE computer aided software engineering CAU control access unit CAV constant angular velocity CBC cipher block chaining CBR constant bit rate CC carbon coby CCD charge coupled device CCI co-channel interferer CCNUMA cache-coherent non-uniform memory access CD cache disable CD compact disc CDDA compact disc digital audio CDMA code division multiple access CDP Cisco Discovery Protocol CDRAM cache dynamic random access memory CER canonical encoding rules CF compact flash CFB cipher feedback CFG context-free grammar CFG control-flow graph CG control gate CGA Color Graphics Adapter CGI common gateway interface CGN Carrier-Grade NAT CHAP Challenge-Handshake Authentication Protocol CHS cylinder/head/sector CI continuous integration CI {common,component} interface CIDR Classless Inter-Domain Routing CIFS Common Internet File System CIL common intermediate language CIR carrier-to-interference ratio CIS contact image sensor CISC complex instruction set {computer,computing} 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 CM configuration management CMA concert multithread architecture CMS {configuration,content,course} management system CMI control {management,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 CPP C preprocessor 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 cable select CS chip select CS code segment CS computer science CSI channel state information CSI common system interface 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 CSRG Computer Systems Research Group CSS cascading style sheets CSV comma-separated values CTM close to metal CTR counter [mode] CTS clear to send CUA common user access CUT coordinated universal time CV control voltage CVE common vulnerabilities and exposures CVS Concurrent Versions System DA destination address DAA distributed application architecture DAB digital audio broadcasting DAC digital [to] analog converter DAC discretionary access control DAD duplicate address detection DANE DNS-based Authentication of Named Entities DAO disk at once DAP Directory Access Protocol DAT digital audio tape DAT dynamic acceleration technology DB database DBA database administrator 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 debugging extensions DE desktop environment 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 diagnostic function test DFT discrete Fourier transform 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 diode logic DL discrete logarithm DL download DLE data link escape DLL dynamic link library DLP discrete logarithm problem DMA direct memory access DMI desktop management interface DMS document management system DMT discrete multitone modulation DNARD Digital network appliance reference design DND drag and drop DNS Domain Name System DNSSEC DNS Security Extensions DOE distributed object environment DOF data over fibre DOM document object model DOS denial of service DOS disk operating system DP DisplayPort DPC deferred procedure call DPCM differential pulse code modulation DPD dead peer detection DPI deep packet inspection DPI dots per inch DPL descriptor privilege level DPS Display PostScript DPST display power savings technology DRAAS disaster recovery as a service DRAM dynamic random access memory DRBG deterministic random bit generator DRI direct rendering infrastructure DRM digital rights management DRRS display refresh rate switching DS debug store DSA digital signature algorithm DSAP destination service access point 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 DTLS datagram transport layer security 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 DVI device independent DVI Digital Visual Interface DVR digital video recorder E-XER extended XML encoding rules EABI embedded-application binary interface EAI Email Address Internationalization EAI Enterprise Application Integration EAP Extensible Authentication Protocol EAPOL EAP over Lan EBCDIC Extended Binary Coded Decimal Interchange Code EBR extended boot record EC elliptic curve ECC elliptic curve cryptography ECC error correction code ECDH elliptic curve Diffie-Hellman ECDL elliptic curve discrete logarithm ECDLP elliptic curve discrete logarithm problem ECDSA elliptic curve digital signature algorithm 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 EdDSA Edwards curve digital signature algorithm EDGE explicit data graph execution EDID extended display identification data EDO extended data out EDS electronical data sheet EEE energy efficient ethernet EEPROM electrically erasable programmable read only memory EFI extensible firmware interface EFL emitter follower logic EFM eight to fourteen modulation EGA Enhanced Graphics Adapter EGP exterior gateway protocol EH extension header EIDE enhanced 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 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 ERD entity relationship diagram ERE extended regular expression ESDRAM enhanced synchronous dynamic random access memory ESS electronic switching system ESS extended service set ESSID extended service set identifier 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 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 FF finite field FF form feed FFDH finite-field Diffie-Hellman 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 FIPS Federal Information Processing Standards 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 FSF Free Software Foundation FSK frequency shift keying FSM finite-state machine FTA fault tree analysis FTL flash translation layer 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 GCM Galois counter mode GCR group-coded recording GDT global descriptor table GEM graphics environment manager GEM graphics execution 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 GOP graphics output protocol GOT global offset table GPE general purpose event GPF general protection fault GPG GNU Privacy Guard 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 graphical user interface GUID globally unique identifier GVFS git virtual file system HA high availability HAL hardware abstraction layer HAT hashed array tree HBA host bus adapter HCF halt and catch fire HCI host controller interface HCI human-computer interaction HCL hardware compatibility list HDCP High-bandwidth Digital Content Protection HDD hard disk drive HDL hardware description language HDMI High-Definition Multimedia Interface 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 HOOD hierarchical object oriented design HP Hewlett-Packard HPC high performance computing HPET high precision event timer HSM hardware security module HSM hierarchical storage management HT hyper-threading HTC hardware thermal control HTCC high temperature co-fired ceramic HTML HyperText Markup Language HTT hyper-threading technology HTTP Hypertext Transfer Protocol HTTPS Hypertext Transfer Protocol Secure HVM hardware virtual machine HZ Hertz I2O intelligent input/output IA information assurance IAAS infrastructure as a service IANA Internet Assigned Numbers Authority IBC iterated block cipher IBM International Business Machines IBS instruction based sampling IBSS independent basic service set IC integrated circuit ICA independent computer architecture ICB Internet Citizen's Band ICE in-circuit emulator ICE internal compiler error ICH I/O controller hub ICMP Internet Control Message Protocol ICT information and communications technology ICW initialization command word IDA Intel dynamic acceleration IDCMP Intuition direct communication message port IDE integrated development environment IDE integrated drive electronics 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 IFF Interchange File Format 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 ILOM integrated lights-out management ILP instruction level parallelism IM instant messaging IMAP Internet Message Access Protocol IMC integrated memory controller IMCR interrupt mode configuration register IMR interrupt mask register IMS information management system INCITS InterNational Committee for Information Technology Standards IO input/output IOCTL input/output control IOMMU input/output memory management unit IOT Internet of Things IP Internet Protocol IP intellectual property IPC interprocess communication IPE integrated programming environment IPI interprocessor interrupt IPNG Internet Protocol, Next Generation IPS in-plane switching IPS intrusion prevention system 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 in-service register ISR interrupt service routine IST interrupt stack table ISV independent software vendor IT information technology ITB Intel Turbo Boost ITIL information technology infrastructure library ITSM IT service management 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 KASLR kernel address space layout randomization 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 machine KVM kernel virtual memory KVM keyboard, video, [and] mouse 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 LInux LOader LILO last in, last out 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 LLDP link layer discovery protocol 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 LOM lights-out management 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 Linux standards base LSB least significant {bit,byte} LSI large scale integration LSL load segment limit LSN Large Scale NAT LSN log sequence number LSR label switch router LTCC low temperature co-fired ceramic LTO link time optimization LTR left to right LTR load task register LTR letter(-sized paper) LTS long term support LUA Lua Uppercase Accident LUN logical unit number LV logical volume LVM logical volume management LVT local vector table LWP light-weight process LZW Lempel Ziv Welch MAC mandatory access control MAC {media,medium} access control MAC message authentication {check,code} MADT multiple APIC descriptor table MB megabyte MBA multi-boot agent MBR master boot record MBS megabits per second MC memory controller MCA machine check architecture MCA MicroChannel architecture MCC multiversion concurrency control MCE machine check exception MCGA Multi-Color Graphics Array 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 MFC Microsoft Foundation Classes MFM modified frequency modulation MI machine-independent MIB management information base MIC message integrity {check,code} MID mobile Internet device MIDI musical instrument digital interface MIF management information format MII media independent interface MIM man in the middle MIMD multiple instruction, multiple data 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 MITM man in the middle ML machine language ML machine learning ML mailing list ML markup language ML maximum likelihood MLC multi-level cell MLD multicast listener discovery MLHP micro loop heat pipe MMF multi-mode fiber MMIC monolithic microwave integrated circuit MMIO memory mapped input/output MMORPG massive multiplayer online role playing game MMU memory management unit MMX matrix math extension MMX multimedia extension MMX multiple 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 multi-platform MP multiplayer MP {multiprocessing,multiprocessor} MPEG moving picture experts group MPI message passing interface MPLS Multiprotocol Label Switching MPP massively parallel processor MPS memory pool system MPS multiprocessor specification MR modem ready MRU most recently used MS Microsoft MSB most significant {bit,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 MSTP Multiple Spanning Tree Protocol MT machine translation MTA mail transfer agent MTBF mean time between failures MTP media transfer protocol 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 NAPT Network Address Port Translation 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 NDFA nondeterministic finite automaton NE numeric error NFA nondeterministic finite automaton NFC near-field communication NFCI no functional change intended NFS network file system NFV network function virtualization NIA next instruction address NIC network information center NIC network interface card NIDS network intrusion detection system NIP network interface protocol NIPS network intrusion prevention system NIS network information service NIST National Institute of Standards and Technology NLS native language support NMI non-maskable interrupt NNTP Network News Transfer Protocol NOC network operations center NOP no operation NOS network operating system NP nondeterministic polynomial time NRZ non-return to zero NSA nation-state adversary NSA no such agency 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 OFB output feedback OFDM orthogonal frequency division multiplexing OFET organic field-effect transistor OLAP online analytical processing OLE object linking and embedding OLTP online transaction processing ONFI open nand flash interface OO OpenOffice OO object oriented OOB out of band OOE out of order execution OOM out of memory OOO OpenOffice.org OOP object oriented programming OOPS object oriented programming systems OOSE object oriented software engineering OPM operations per minute OPS operations per second OQL Object Query Language ORB object request broker ORM object-relational mapping OS operating system OSD open source definition OSF open software foundation OSI Open Source Initiative OSI open systems interconnection OSPF open shortest path first OSPM OS power management OSS open sound system OSS open source software OSVW operating system visible workarounds OTP one time password OTP open telecom platform OU organizational unit OUI organizationally unique identifier OWL Web Ontology Language P2P PCI to PCI P2P peer to peer PA phase accumulator PA physical address PAAS platform as a service PAC phase-amplitude converter PAE physical address extension PAL phase alternating line PAL programmable array logic 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 PCB process control block 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 PCP Port Control Protocol 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,directory} page PDS product data sheet PDU protocol data unit PE protection enable PEAP Protected EAP PECI platform environment control interface PEP protocol extension protocol PER packed encoding rules PFS perfect forward secrecy PGAS partitioned global address space PGE page global enable PGP Pretty Good Privacy PHB PCI host bridge PHP PHP: Hypertext Preprocessor PIC position independent code PIC programmable interrupt controller PICNIC problem in chair, not in computer PID process id PIE position independent executable PIL Priority Interrupt Level PIM personal information manager PIM platform-independent model PIO programmed input/output PIPT physically indexed, physically tagged PIQ prefetch input queue PIT programmable interrupt timer PIV personal identity verification PKCS public-key cryptography standards PKI public key infrastructure 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 PPB PCI [to] PCI bridge PPC PowerPC 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 pseudorandom bit sequence PRG pseudorandom generator PRF pseudorandom function [family] PRML partial response, maximum likelihood PRN pseudorandom {noise,number} PRNG pseudorandom number generator PROM programmable read only memory PRP pseudorandom permutation PSD power spectral density PSE page size extensions PSK phase shift keying PSK pre-shared key 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 PVST Per-VLAN Spanning Tree PWM pulse width modulation PXE preboot execution environment QA quality assurance QAM quadrature amplitude modulation QAM quality assurance management QBE query by example QC quality control QDI quasi delay insensitive QOS quality of service QVL qualified vendor list R/O read only R/W read/write RA receiver address RA remote assistance RA resource affinity RA router advertisement RAD rapid application development RAID redundant array of {independent,inexpensive} disks RAM random access memory RAS reliability, availability and serviceability RAS remote access service RAS restartable atomic sequence RAS row address strobe RBF radial basis function RBT red-black tree RC release candidate RC remote control RCS Revision Control System RCS revision control system RCU read, copy, update RDB Rigid Disk Block RDBMS relational database management system RDF Resource Description Framework 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 RGBA red green blue alpha RGMII reduced gigabit media independent interface RH read hit RHEL Red Hat Enterprise Linux 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 {computer,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 RMO Relaxed Memory Ordering 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 RPKI resource PKI RPL requested privilege level RPM revolutions per minute RPN reverse Polish notation RPVST Rapid Per-VLAN Spanning Tree RR random replacement RR round robin RS relay station RSA Rivest, Shamir, [and] Adleman RSIP Realm Specific IP RSN Robust Secure Network RSS really simple syndication RSS residual sum of squares RSTP Rapid Spanning Tree Protocol RT real time RTC real time clock RTC real time computing RTF rich text format RTL register transfer language RTL resistor-transistor logic RTL right to left RTOS real time operating system RTS request to send RTT round trip time RUP rational unified process RW Rabin-Williams RWM read-write memory RX {receive,receiver} S/PDIF Sony/Philips Digital Interface Format 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 SAP service access point SAPIC streamlined advanced programmable interrupt controller SASD structured analysis, structured design SASI Shugart Associates System Interface 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 SCI scalable coherent interface SCI system control interrupt SCM software configuration management SCM source code management SCM storage-class memory SCP secure copy SCSI Small Computer System Interface SCTP Stream Control Transmission Protocol SDI symbol deinterleave SDK software development kit SDL Simple Declarative Language SDL Simple Direct-media Layer SDLC {software,system,systems} development life cycle SDN software defined networking SDRAM synchronous dynamic random access memory SDS software defined storage SDT syntax-directed translation SEGV segmentation violation SEO search engine optimization SFC sequential function chart SFI simple firmware interface SFI software fault isolation SFTP SSH File Transfer Protocol SFTP Serial File Transfer Protocol SFTP Simple File Transfer Protocol SGMII serial gigabit media independent interface SGRAM synchronous graphics random access memory SHA secure hash algorithm SIDH supersingular isogeny Diffie-Hellman SIEM security information and event management SIFS short inter-frame space SIMD single instruction, multiple data SIMM single inline memory module SIP Session Initiation Protocol SIR signal-to-interference ratio SIR slow infrared SISD single instruction, single data SLC single-level cell SLDRAM synchronous-link dynamic random access memory SLED single large expensive disk 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 SMAP Simple Mail Access Protocol SMAP supervisor mode access prevention SMART self-monitoring analysis and reporting technology SMBIOS System Management BIOS SMC system management controller SMF single mode fiber SMI structure of management information SMI system management interrupt SMM system management mode SMP symmetric multiprocessing SMT simultaneous multithreading SMTP Simple Mail Transfer Protocol SMU system management unit SNAP Sub-Network Access Protocol 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 SOH start of header SOHO small office/home office SOL serial over LAN SP service pack SP stack pointer SPARC scalable processor architecture SPARQL SPARQL Protocol and RDF Query Language SPD security policy database SPD serial presence detect SPDIF Sony/Philips digital interface format SPI serial peripheral interface SPI stateful packet inspection SPL system interrupt priority level SPL spinlock 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 self-snoop SS stack segment SSA static single assignment SSAP source service access point 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 SSID service set identifier SSL secure sockets layer SSP stack smashing protection STC software thermal control STD state transition diagram STP Spanning Tree Protocol STP shielded twisted pair SUS Single Unix Specification SUT system under test SVG scalable vector graphics SVGA Super Video Graphics Array SVM secure virtual machine SVM support vector machine SVR System V Release SVS Separate Virtual Space SWF Shockwave Flash SWIG simplified wrapper [and] interface generator SYR symbol timing recovery TA test assertion TA transmitter address TAI international atomic time TAO track at once TAOCP The Art of Computer Programming TAP Test Anything 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 TKIP Temporal Key Integrity Protocol TLA top level aggregator TLB translation lookaside buffer TLD top level domain TLS thread local storage TLS transport layer security TM Turing machine TM thermal monitor TMDS transition minimized differential signaling TMO timeout TOD time of day TOS terms of service TOS trusted operating system TOS type of service TP transaction processing TPI tracks per inch TPM transactions per minute TPM trusted platform module TPR task priority register TPS transactions per second TPS transmission parameters signaling TR task register TR token ring TRL timing recovery loop TRNG true random number generator TS terminal services TS time series TS time stamp TS transport stream TSC time stamp counter TSD time stamp disable TSL test, set, lock TSO time sharing option TSO Total Store Ordering TSP Time-Stamp Protocol TSP Tunnel Setup Protocol TSP time synchronization protocol TSP traveling salesman problem TSS task state segment TTL time to live TTL transistor-transistor logic TTM translation table maps TTY teletype TUI {terminal,text-based,textual} user interface TX {transmit out,transmitter} TZ time zone UAC user {access,account} control UAF use-after-free UART universal asynchronous receiver/transmitter UAT user acceptance testing UB undefined behavior UC uncacheable UCS uniform-cost search UDMA ultra DMA UDO ultra density optical UDP User Datagram Protocol UEFI unified extensible firmware interface UFS Unix File System UGA universal graphics adapter UI unit interval UI user interface UID unique identifier UID user identifier UL upload UMA uniform memory access UMA upper memory area UMB upper memory block UML unified modeling language UMPC ultra-mobile PC 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 UX user experience VA vertical alignment VA virtual address VA volt-ampere 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 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 VM virtual {machine,memory} VME virtual mode extension VMX vector multimedia extensions VMX virtual machine extensions VOD video on demand VPN virtual private network VR virtual reality VRAM video random access memory VRF virtual routing and forwarding VRM voltage regulator module VRRP Virtual Router Redundancy Protocol VSTP VLAN Spanning Tree Protocol VTP VLAN Trunking Protocol W watt W3C World Wide Web Consortium WAN wide area network WAP Wireless Application Protocol WAP wireless access point WDT watchdog timer WEP Wired Equivalent Privacy WFI wait for interrupt WFQ weighted fair queuing WH write hit WIFI wireless fidelity WLAN wireless local area network WM write miss WMI Windows Management Instrumentation WOL Wake-on-LAN WOM Wake-on-Modem WOR Wake-on-Ring WORM write once read many WP WordPerfect WP word processor WP write protect WPA Wi-Fi Protected Access WPA2 Wi-Fi Protected Access II WPS Wi-Fi Protected Setup 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 XDMCP X Display Manager control protocol XER XML encoding rules XGA Extended Graphics Array XIP execute in place XML Extensible Markup Language XOR exclusive or XP extreme programming XSI X/Open System Interface 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 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