@c -*-texinfo-*-
@c This is part of the GNU edition of V.E.R.A.
@c Copyright (C) 1993/2020 Oliver Heidelbach
@c See the file vera.texi for copying conditions.
@c 
@c Syntax:
@c ACRONYM
@c Expansion[ (Reference)][, "Style"]
@c Additional explanations are included in [square brackets]

@table @asis
@item OA
Object Adapter (ORB, IDL)

@item OA
Office Automation

@item OA
Open Access (SPI, DB)

@item OAA
Open Arcade Architecture (Intel)

@item OACIS
Oregon Advanced Computing InStitute (org.)

@item OAD
Open Architecture Driver (Iomega)

@item OADG
Open Architecture Development Group (org.)

@item OAG
Online Airline Guide (CIS)

@item OAG
Open Application Group (org., USA)

@item OAGIS
Open Applications Group Interoperability Standard

@item OAI
Open Applications Interface

@item OAI
Open Archives Initiative (org.)

@item OAIS
Open Archival Information System (ISO 14721)

@item OAK
Object Application Kernel (Java, predecessor, Sun)

@item OAM
Object Attribute Memory (Gameboy)

@item OAM
Operations, Administration and Management [cell] (ATM)

@item OARNET
Ohio Academic Resources NETwork (network, USA), "OARnet"

@item OAS
Office Automation System

@item OASF
Office Automation System Facilities (OA)

@item OASIS
Online Application System Interactive Software

@item OASIS
Open And Secure Information Systems (Eureka)

@item OASIS
Organization for the Advancement of Structured Information Standards (org.)

@item OASYS
Office Automation SYStem

@item OATS
Office Automation Technology and Services (OA)

@item OAW
Optically Assisted Winchester (HDD, Seagate)

@item OBAK
OBjektAbbildungskatalog (ATKIS)

@item OBB
Opaque Binary Blobs

@item OBD
On-Board Diagnostics

@item OBD
Online Bugs Database (Sun, DB)

@item OBDH
On-Board Data Handling (ESA, Venus-Express)

@item OBDR
One Button Disaster Recovery (HP, Streamer)

@item OBEX
OBject EXchange (WordPerfect)

@item OBGA
Organic Ball Grid Array (BGA, IC, CPU)

@item OBI
Open Buying on the Internet (Internet, WWW)

@item OBM
Original Brand Manufacturer

@item OBS
Online Book Store (Internet, WWW)

@item OBS
Open Broadcaster Software

@item OBS
Opensuse Build Service (openSUSE, Linux)

@item OBST
OBject management system of STONE (STONE)

@item OBTWIAVBP
OBligatory The World Is A Very Big Place (telecommunication, Usenet, IRC), "ObTWIAVBP"

@item OBU
On-Board-Unit

@item OC
Object Class (OOP)

@item OC
Over-Clocked

@item OC1
Optical Carrier level 1 [51,48 Mbps] (SONET), "OC-1"

@item OC12
Optical Carrier level 12 [622,08 Mbps] (SONET, STM-4), "OC-12"

@item OC18
Optical Carrier level 18 [933,12 Mbps] (SONET, STM-6), "OC-18"

@item OC24
Optical Carrier level 24 [1244,16 Mbps] (SONET, STM-8), "OC-24"

@item OC3
Optical Carrier level 3 [155,52 Mbps] (SONET, STM-1), "OC-3"

@item OC36
Optical Carrier level 36 [1866,24 Mbps] (SONET, STM-12), "OC-36"

@item OC48
Optical Carrier level 48 [2488,32 Mbps] (SONET, STM-16), "OC-48"

@item OC768
Optical Carrier level 768 [39813,12 Mbps] (SONET, STM-256), "OC-768"

@item OC9
Optical Carrier level 9 [466,56 Mbps] (SONET, STM-3), "OC-9"

@item OC96
Optical Carrier level 96 [4976,64 Mbps] (SONET, STM-32), "OC-96"

@item OCAML
Objective Categorical Abstract Machine Language, "OCaml"

@item OCAP
Open Crypto Audit Project

@item OCAT
Open Capture and Analytics Tool (AMD)

@item OCC
Operations Control Center

@item OCC
Other Common Carrier

@item OCCA
Open Cooperative Computing Architecture

@item OCD
Off-Chip-Driver [calibration]

@item OCD
Out-of-Cell Delineation (UNI)

@item OCE
Open Collaborative Environment (Apple)

@item OCE
Optimized Connectivity Experience (WFA)

@item OCEO
Offensive Cyber Effects Operations

@item OCF
Open Clustering Framework

@item OCF
Open Computing Facility

@item OCF
Open Connectivity Foundation (org.)

@item OCFS
Oracle Cluster File System (Oracle, DB)

@item OCG
OEstereichische Computer Gesellschaft (org., Austria)

@item OCI
Open Container Initiative (org.)

@item OCL
Object Constraint Language (DB, OO, UML, CASE)

@item OCL
Open Content License (OPL)

@item OCL
Operation Control Language

@item OCL
OS/2 inside Class Library (OS/2)

@item OCLC
Online Computer Library Center (org., Internet, USA)

@item OCO
Object Code Only (OOP)

@item OCP
Open Compute Project (org.)

@item OCPA
Open Content Platform Association (org., Amiga, Sharp, JVC, Kyocera, ...)

@item OCR
Optical Character Recognition

@item OCS
Object Compatibility Standard (Motorola)

@item OCS
Object Container Streaming

@item OCS
Open Cabling System

@item OCSP
Online Certificate Status [revocation] Protocol (cryptography, RFC 6990)

@item OCX
OLE Control eXtensions (MS)

@item OD
Optical Disk

@item ODA
Office Document Architecture [protocol] (RFC 1197, ISO 8613, JTC1, ECMA)

@item ODA
Open Document Architecture (CCITT T.410)

@item ODAPI
Open Database Application Programming Interface (Borland, DB, API), "Odapi"

@item ODBC
Open DataBase Connectivity (WOSA, DB, API)

@item ODBMS
Object orientated Database Management System (DBMS, DB)

@item ODC
Optical Disc Corporation (manufacturer)

@item ODD
Operator Distance-Dialing

@item ODE
Object Database and Environment (AT&T, DB)

@item ODE
Online Data Entry

@item ODE
Open Dynamics Engine

@item ODETTE
Organization for Data Exchange by Tele-Transmission in Europe (org., Europe)

@item ODF
Open Document Format [for Office Applications] (OASIS, ISO/IEC 26300)

@item ODF
Opendoc Development Framework (Apple, OpenDoc)

@item ODF
Opendoc Part Framework (OpenDoc)

@item ODI
Open Data link Interface (Novell)

@item ODI
Open Device Interconnect

@item ODIA
OpenDoc Internet Adapter (Apple, ALOE, predecessor)

@item ODIF
Office Document Interchange Format (ISO 8613, ASN.1, ODA)

@item ODIN
Optimale Datenmodelle und algorithmen fuer Ingenieur- und Naturwissenschaften [auf hochleistungsrechnern] (Uni Karlsruhe, Germany, SNI)

@item ODINSUP
Open Data link Interface - Network driver interface specification SUPport (ODI, NDIS)

@item ODISS
Optical Digital Image Storage System

@item ODK
Office Development Kit

@item ODL
Object Description Language

@item ODL
Open Document Language (ODA, SGML)

@item ODLI
Open Data Link Interface

@item ODM
Object Database Manager (AIX, IBM)

@item ODM
Original Design Manufacturer (OEM)

@item ODMA
Open Document Management API (API)

@item ODMG
Object Database Management Group (org., DB)

@item ODP
Octal-Die-Package

@item ODP
Open Directory Project (WWW, Netscape)

@item ODP
Open Distributed Processing (ISO)

@item ODP
OverDrive Processor (Intel)

@item ODPR
OverDrive Processor Replacement (Intel)

@item ODR
Octal Data Rate (SDR, GDR, QDR)

@item ODR
Ontrack Data Recovery (Ontrack, Software, Netware)

@item ODR
Optimized Dynamic Routing (SNI)

@item ODS
Offenes Deutsches Schulnetz (network)

@item ODS
Office Dialog System (OA)

@item ODS
Open Data Services

@item ODS
Optical Data Systems [inc.] (manufacturer)

@item ODS
Output Delivery Database

@item ODS
Overhead Data Stream

@item ODSI
Open Directory Service Interfaces (MS, Windows NT)

@item ODSPE
Optical-based Digital Signal Processing Engine (DSP)

@item ODT
On-Die-Termination

@item ODT
Online Debugging Technique

@item ODT
Open DeskTop (SCO, GUI)

@item ODVA
Open DeviceNet Vendor Association (org.)

@item OE
Outlook Express (MS, Internet)

@item OEA
Organic and printed Electronics Association (org.), "OE-A"

@item OEB
Open eBook [standard] (MS, NuvoMedia, ...)

@item OECOS
Organizational Engineering for Communications and Organizational Systems (SNI, OA)

@item OEM
Original Equipment Manufacturer (ODM)

@item OEP
Operand Execution Pipelines (Motorola, CPU)

@item OES
Olivetti EntsorgungsService (Olivetti)

@item OES
Open Enterprise Server (Novell, Linux)

@item OF
Overflow Flag (assembler)

@item OFA
Optimal Flexible Architecture (Oracle)

@item OFC
Open Financial Connectivity (MS, banking)

@item OFDM
Orthogonal Frequency Division Multiplexing (FDM, DVB-T, WIMAX)

@item OFDMA
Orthogonal Frequency Division Multiple Access (WIMAX)

@item OFET
Organic Field Effect Transistor

@item OFFIS
Oldenburg Forschungsinstitut Fuer Informatikwerkzeuge und -Systeme (org., Uni Oldenburg)

@item OFFSAP
Oracle Fusion For SAP (Oracle, SAP)

@item OFL
[SIL] Open Font License

@item OFS
Object File System

@item OFS
Old/Original File System (Amiga, FS)

@item OFS
Output Field Separator (AWK)

@item OFTA
OFfice of the Telecommunications Authority (org., Hongkong)

@item OFTP
ODETTE File Transfer Protocol (ODETTE)

@item OFX
Open Financial eXchange (banking, Intuit, MS, Checkfree, USA)

@item OGB
Opensolaris Governing Board (Solaris)

@item OGC
Office of Government Commerce (org., UK)

@item OGC
Open Geospatial Consortium (org., OWS)

@item OGM
Ogg Media Streams (DivX, video)

@item OGRAN
OpenGate - Router Access Node ??? (RND), "OG-RAN"

@item OGSA
Open Grid Services Architecture (grid, GGF)

@item OGSADAI
Open Grid Services Architecture - Database Access and Integration (OGSA, grid, IBM, Oracle), "OGSA-DAI"

@item OGSI
Open Grid Service Infrastructure (OGSA, GGF, WG, grid)

@item OH
Off-Hook (MODEM)

@item OHA
Open Handset Alliance (org., Android)

@item OHCI
Open Host Controller Interface (USB, Compaq, OPTI, Apple, UHCI)

@item OHKO
One Hit Knock Out (slang)

@item OIA
Operator Information Area (IBM)

@item OIC
Oh, I See (telecommunication, Usenet, IRC)

@item OID
Object IDentifier (OSI)

@item OIDL
Object Interface Definition Language

@item OIDP
Oracle Internet Development Pack (Oracle, Internet)

@item OIF
Outgoing InterFace (PIM, IIF, Multicast)

@item OII
Operations-Intelligence Interface (mil.)

@item OIIC
Optically Interconnected Integrated Circuits [project] (ESPRIT)

@item OIL
Operator Identification Language (ELI)

@item OIM
Open Information Model

@item OIP
Open Internet Platform (Caldera, Linux, SCO)

@item OIT
Onboard Information Terminal (Airbus, A380)

@item OIW
Open Information Warehouse (SAP, R/3)

@item OIW
OSI Implementors Workshop (OSI)

@item OLAP
OnLine Analytical Processing (DB)

@item OLE
Object Linking and Embedding

@item OLED
Organic Light Emitting Display (OLED, LED)

@item OLEDB
Object Linking and Embedding - DataBase (DB, OLE, MS), "OLE DB"

@item OLEDS
Object Linking and Embedding Directory Services (ODSI, MS), "OLE DS"

@item OLEO
Open Linking and Embedding of Objects (OLE, OpenDoc)

@item OLEP
Organic Light-Emitting Polymer [display]

@item OLI
Originating Line Information

@item OLIS
Oxford Library Information System

@item OLIT
OpenLook Interface Toolkit (OpenLook)

@item OLIVR
OnLine Interactive Virtual Reality, "OLiVR"

@item OLLI
OnLine Library Information

@item OLM
OnLine Monitor

@item OLMC
Output Logic Macro Cell (GAL)

@item OLOCA
Official List of Cygwin Acronyms (Cygwin)

@item OLPS
OnLine Programming System

@item OLRT
OnLine Real-Time

@item OLS
Online Library System

@item OLSR
Optimized Link State Routing (MANET, OLSR, RFC 3626)

@item OLT
Optical Line Terminal (EPON)

@item OLTEP
OnLine Test Executive Program

@item OLTM
Optical Line Terminating Multiplexer, "O-LTM" 

@item OLTP
OnLine Transaction Processing

@item OLWM
OpenLook Window Manager (OpenLook)

@item OM1
Open MPEG consortium 1 (org., MPEG), "OM-1"

@item OMA
Object Management Architecture (OMG)

@item OMA
Open Mobile Alliance (org., mobile-systems)

@item OMA
Outlock Mobile Access (mobile-systems, PDA, WAP)

@item OMADM
Open Mobile Alliance Device Management (OMA), "OMA DM"

@item OMADS
Open Mobile Alliance Data Sync (OMA), "OMA DS"

@item OMAP
Open Multimedia Application Platform (TI)

@item OMAP
Operations, Maintenance and Administration Part (SS7)

@item OMC
Operation and Maintenance Center (PLMN, GSM, mobile-systems)

@item OME
Open Messaging Environment (Novell)

@item OMEMO
OMEMO Multi-End Message and Object encryption (XMPP, PEP)

@item OMF
Object Management Framework (DME)

@item OMF
Object Module Format (IBM, MS)

@item OMF
Open Media Framework (org.)

@item OMFI
Open Media Framework Interchange (OMF)

@item OMG
Object Management Group (IBM, HP, DEC, Tandem, Sun, org.)

@item OMG
Oh My G-d (slang, Usenet, IRC)

@item OMI
Open Messaging Interface

@item OMISTN
Optical Mode Interface SuperTwisted Nematic (LCD), "OMI-STN" 

@item OMN
Open Network Management

@item OMR
Optical Mark Reader (Fax)

@item OMR
Optical Mark Recognition

@item OMS
Object Management System

@item OMS
Onboard Maintenance System (Airbus, A380)

@item OMS
Open Music System (MIDI, Opcode Systems)

@item OMT
Object Management Technique (Westmount, CASE)

@item OMT
Object Modelling Technique (CASE)

@item OMTP
Off Main Thread Painting (Firefox)

@item OMW
On My Way (MMORPG, slang)

@item ON
Ordinary Node (Kazaa, P2P)

@item ONA
Open Network Architecture

@item ONAC
Operations Network Administration Center

@item ONAL
Off Network Access Line

@item ONC
Open Network Computing (Sun)

@item ONCXDR
Open Network Computing eXternal Data Representation (Sun), "ONC XDR" 

@item ONE
Omnifunctional Networking Environment (Panasonic)

@item ONE
Open Network Environment (Netscape)

@item ONF
Open Networking Foundation (org.)

@item ONFI
Open NAND Flash Interface (Flash), "ONFi"

@item ONI
OpenNet Initiative (org.)

@item ONI
Operator Number Identification

@item ONIX
ONline Information eXchange [guidelines]

@item ONMS
Open-Network Management System

@item ONS
Object Numbering System (EPC)

@item ONU
Optical Network Unit

@item ONVIF
Open Network Video Interface Forum (org.)

@item OO
Object Orientated

@item OOA
Object Orientated [system] Analysis (OOP)

@item OOAD
Object Orientated Analysis and Design (OOP)

@item OOB
Out Of Band (S-ATA), "OoB"

@item OOC
Object-Oriented Code

@item OOC
Optical Orthogonal Code [modulation]

@item OOCTG
Object Orientated COBOL Task Group (CODASYL, org., OOP)

@item OOD
Object-Oriented Design

@item OODB
Object Oriented Data Base (OOP, DB)

@item OODBMS
Object Orientated Database Management System (DBMS, DB)

@item OODL
Object Orientated Dynamic Language (OOP)

@item OOF
Office of The Future (OA)

@item OOF
Out of Frame (DS3/E3)

@item OOK
On-Off Keying

@item OOL
Object-Oriented Language (OOP)

@item OOL
Open Objects Library (OS/2)

@item OOM
Object Orientated Modelling (OO)

@item OOM
Object-Oriented Methodology (OOP)

@item OOM
Out Of Memory

@item OONI
Open Observatory of Network Interference (Org,, Internet)

@item OOO
Out Of Order [execution] (Intel, Pentium, CPU)

@item OOP
Object Orientated Programming (OOP)

@item OOPL
Object-Oriented Programming Language (OOP)

@item OOPS
Object Oriented Program Support (OOP)

@item OOPS
Object-Oriented Programming System (OOP)

@item OOPSLA
[conference on] Object Orientated Programming Systems, Languages and Applications (ACM, OOP, conference)

@item OOPSTAD
Object Orientated Programming for SmallTalk Application Development association (org., OOP)

@item OOS
Object-Oriented Systems

@item OOS
Out-Of-Sequence

@item OOSA
Object Orientated System Analysis (OOP)

@item OOSH
Object-Oriented SHell (OOP, Shell)

@item OOT
Object-Oriented Technology (OOP)

@item OOTB
Out Of The Box (slang, Cygwin)

@item OOUI
Object Orientated User Interface (UI, OO, WPS)

@item OOXML
Office Open XML (MS, XML)

@item OP
Oracle9iAS Personalization (Oracle, DB)

@item OP
Original Poster (slang, Usenet)

@item OPA
Open Publishing Architecture

@item OPAC
Online Public Access Catalogue (Internet)

@item OPC
OLE for Process Control (OLE, HMI, SCADA)

@item OPC
Open Platform Communications

@item OPC
OpenGL Performance Characterization [project group] (OpenGL, org.)

@item OPC
Optical Proximity Correction [lithography]

@item OPC
Organic Photo Conductor

@item OPC
Overall Performance Category

@item OPCCA
Open Platform Communications - Classic Architecture (OPC), "OPC-CA"

@item OPCOS
OPerating COuntrieS

@item OPCR
Original Program Clock Reference

@item OPCUA
OLE for Process Control Unified Architecture (OPC, OLE), "OPC UA"

@item OPCUA
Open Platform Communications - Unified Architecture (OPC), "OPC-UA"

@item OPDU
Operation Protocol Data Units

@item OPDV
Ordnungsmaessigkeit und Pruefung der DatenVerarbeitung (GoBS, banking)

@item OPEN
[You-R] OPerating ENvironment (Infineon, RFID)

@item OPEN
Open Protocol Enhanced Networks

@item OPENBFS
Open Be File System (BeOS, FS), "OpenBFS"

@item OPENELEC
OPEN Embedded Linux Entertainment Center (Linux), "OpenELEC"

@item OPENEXR
OPEN EXtended Range ??? (HDR), "OpenEXR"

@item OPENGL
OPEN Graphics Language (OpenGL), "OpenGL"

@item OPENHAB
OPEN Home Automation Bus, "OpenHAB"

@item OPENHCI
OPEN Host Controller Interface (USB), "OpenHCI"

@item OPENIL
OPEN Image Library [old term] (DevIL), "OpenIL"

@item OPENPMF
Open Policy Management Framework (CORBA, COACH), "OpenPMF"

@item OPERA
Open PLC European Research Alliance (org., PLC, Europe)

@item OPES
Open Pluggable Edge Services

@item OPI
Open Prepress Interface (DTP)

@item OPIE
Open Palmtop Integrated Environment (Linux, PIM)

@item OPK
OEM Pre-installation Kit (MS, Windows, OEM)

@item OPL
Open Publication License (OCL)

@item OPL
Organizer Programming Language (Psion, PDA)

@item OPM
Operations-Per-Minute

@item OPM
Optimized Power Management (AMD, Opteron)

@item OPML
Outline Processor Markup Language (XML, RSS)

@item OPP
Object Push Profile (Bluetooth)

@item OPQ
Optimal Picture Quality [mode] (CRT, Iiyama)

@item OPREMA
OPtik-REchenMAschine

@item OPS
Operations Per Second (CPU)

@item OPS
Oracle Parallel Server (Oracle)

@item OPS
Outbreak Prevention Service (Firewall, TrendMicro)

@item OPSEC
Open Platform for Secure Enterprise Connectivity (org., manufacturer, IDS)

@item OPT
Open Protocol Technology

@item OQL
Object Query Language (ODMG)

@item OR
Observation Report (CC)

@item OR
Originator / Recipient (X.400, MOTIS), "O/R"

@item ORAIS
Opportunities and Risks of Artificial Intelligent Systems (conference, GI)

@item ORB
Object Request Broker (OMA, OMG, CORBA, ORB)

@item ORCA
Online Resource Control Aid

@item ORDB
Open Relay DataBase (SPAM)

@item ORDBMS
Object Relational Database Management System (DBMS, DB)

@item ORK
Office Resource Kit (MS, Windows)

@item ORM
Object Role Modeling (OO, DB)

@item ORM
Object/Releational Mapper

@item ORM
Optical Remote Module

@item OROM
Optical Read Only Memory (ROM), "O-ROM" 

@item ORS
Output Record Separator (AWK)

@item ORT
Ongoing Reliability Test

@item OS
Operating System

@item OS2
Operating System /2 (IBM, OS), "OS/2"

@item OS200
Operating System 200 (Honeywell), "OS/200"

@item OS2000
Operating System 2000 (Honeywell), "OS/2000"

@item OS3
Oregon State Open Shop Operating System (OS, CDC 3300), "OS-3"

@item OS32MT
Operating System /32 - Multitasking Time (OS, Interdata), "OS/32-MT"

@item OS32ST
Operating System /32 - Serial Time (OS, Interdata), "OS/32-ST"

@item OS360
Operating System /360 (IBM, OS), "OS/360"

@item OS4
Operating System /4 (OS, UNIVAC 9700), "OS/4"

@item OS400
Operating System /400 (IBM, OS), "OS/400"

@item OS7
Operating System /7 (OS, UNIVAC 9700), "OS/7"

@item OS700
Operating System /700 (OS, Honeywell), "OS/700"

@item OS8
Operating System /8 (OS, DEC, PDP 8), "OS/8"

@item OS9
Operating System - 9 (Microware, OS), "OS-9"

@item OSA
Object System Adaptor (SOM)

@item OSA
Office Systems Administrator (OA)

@item OSA
Open Scripting Architecture (Apple, OS/2)

@item OSAC
Operator Services Assistance Center

@item OSADL
Open Source Automation Development Lab (org., OSS)

@item OSAIA
Open Source And Industry Alliance (org.)

@item OSAK
Open Systems Application Kernel

@item OSAM
Overflow Sequential Access Method (SAM)

@item OSAR
Optical Storage and Retrieval

@item OSBAR
Open Source Business AwaRd

@item OSBC
Open Source Business Conference

@item OSC
Ohio Supercomputer Center (org., USA)

@item OSCA
Only Specifically Cygwin-list Acronyms (OLOCA, Cygwin)

@item OSCAR
OnScreen Configuration & Activity Reporting (Apex)

@item OSCRL
Operating System Command Response Language

@item OSD
Object-based Storage Device

@item OSD
OnScreen Display

@item OSD
Open Software Description [manifest / standard] (MS, Marimba, XML, DU, DUP, MSIE)

@item OSDB
Open Source DataBase benchmark (benchmark)

@item OSDL
Open Source Development Lab (org., OSS)

@item OSDN
Open Source Development Network (OSS, Network)

@item OSDS
Operating System for Distributed Switching

@item OSE
Open Software / System Environment

@item OSEIA
Open System Environment profile for Imminent Acquisitions (OSE), "OSE/IA"

@item OSES
OperationsSystem/Einheitliches System (OS, ESER, GDR), "OS/ES"

@item OSF
Open Software Foundation (HP, DEC, IBM, org.)

@item OSF
Open Source Firmware (OCP)

@item OSF
Operations System Function (IN)

@item OSF
Oppose Sun Forever [ aka Open Software Foundation] (slang, org.)

@item OSF
OWS Service Framework (OGC, OWS)

@item OSF1
Open Software Foundation [system] /1 (OSF, OS, DEC), "OSF/1"

@item OSG
Open Systems Group (org., SPEC)

@item OSGI
Open Services Gateway Initiative (org., Motorola, Sun, DTAG, Siemens, Toshiba, ...), "OSGi"

@item OSI
Open Source Initiative (org., OSS)

@item OSI
Open Systems Interconnection (ISO 9646-1)

@item OSICS
OSI Communication Systems (OSI)

@item OSID
Origination Signaling IDentifier

@item OSINLCP
[PPP] OSI Network Layer Control Protocol (OSI, PPP, RFC 1377)

@item OSIRM
Open Systems Interconnection/Reference Model (ISO), "OSI/RM" 

@item OSKA
ObjektSchluesselKAtalog (ATKIS)

@item OSL
Open Shading Language (Sony)

@item OSL
Open Subscription License

@item OSM
Operating system Service Module (I2O)

@item OSM
Optical Storage Manager (ARMS)

@item OSMC
Open Source Media Center

@item OSME
Open Systems Message Exchange

@item OSMFT
Operating System / Multiprogramming with a Fixed number of Tasks (OS, IBM S/360), "OS/MFT"

@item OSMVS
Operating System / Multiple Virtual Space (OS, IBM, S/370, OS/MVT, successorr, OS/VS-2), "OS/MVS"

@item OSMVT
Operating System / Multiprogramming with a Variable number of Tasks (OS, IBM, S/360, S/370), "OS/MVT"

@item OSN
Office System Node (IBM, DIA, OA)

@item OSN
Open Systems Network

@item OSNR
Optical Signal-to-Noise Relation (FO)

@item OSO
OverScan Operation (VXA, Streamer)

@item OSP
Optical Storage Processor

@item OSP
OrganisationStrukturPlan

@item OSPCP
Operating System / Primary Control Program (IBM, OS, OS/360, predecessor), "OS/PCP"

@item OSPF
Open Shortest Path First [protocol / routing] (Internet, IGP, RFC 1583)

@item OSPM
Operating System directed [configuration and] Power Management

@item OSQL
Object-Structured Query Language (DB, SQL, OODBMS)

@item OSR
Optical Scanning Recognition

@item OSRT
Operating System / Real Time (OS, Destek Group), "OS/RT"

@item OSS
Open Sound System (Linux, audio)

@item OSS
Open Source Software (OSS)

@item OSS
Operator Service System

@item OSSIM
Open Source Security Information Management (OSS, SIM)

@item OSSVS
Operating System / Single Virtual Space (OS, IBM, S/370, OS/VS2), "OS/SVS"

@item OST
Open System Toolkit (Apollo)

@item OSTA
Optical Storage Technology Association (org.)

@item OSTC
Open System Test Consortium (org., OSTC)

@item OSTP
Office of Science and Technology Policy (org., USA)

@item OSVS1
Operating System / Virtual System - 1 (OS, IBM, S/370), "OS/VS-1"

@item OSVS2
(IBM, MVS), "OS/VS2"

@item OSVS2
Operating System / Virtual System - 2 (OS, IBM, S/370), "OS/VS-2"

@item OSWL2
OS-9 Windows / Level 2, "OSW/L2" 

@item OSWS
Operating System Work Station

@item OT
Object Technology

@item OT
Oblivious Transfer

@item OT
Off Topic (slang, Usenet)

@item OT
Open Transport (Apple)

@item OTA
Office of Technology Assessment (org., IBM, HP, AEG, AT&T, SNI, ...)

@item OTA
Over-The-Air [update]

@item OTDR
Optical Time Domain Reflectometer (cable)

@item OTES
Outside Thermal Exhaust System (Abit)

@item OTFT
Organic Thin-Film Transistor (TFT)

@item OTG
[USB] On-The-Go (USB)

@item OTI
Object Technology International (IBM)

@item OTM
Object Transaction Monitor (COM, MTS)

@item OTN
Oracle Technology Network (Oracle)

@item OTOH
On The Other Hand (slang, Usenet, IRC)

@item OTP
One Time Password

@item OTP
One Time Programmable [chip] (IC)

@item OTP
One Time Programs

@item OTP
Open Telecom Platform

@item OTPPP
Open Transport/Point-to-Point Protocol (Apple, OT, PPP), "OT/PPP"

@item OTPROM
One Time Programmable Read Only Memory (ROM, IC)

@item OTR
Off-The-Record (XMPP)

@item OTS
Object Transaction Service (CORBA)

@item OTS
Office TeleSystem (OA)

@item OU
Organizational Unit (MS, Windows NT, AD)

@item OUCL
Oxford University Computing Laboratory

@item OUG
Occam User Group (org., user group)

@item OUI
Organization Unique Identifier (IEEE)

@item OUI
Organizational Unit Identifier

@item OUM
Ovonic Unified Memory (ECD)

@item OUTWATS
OUTward Wide Area Telephone Service

@item OVAL
Open Vulnerability and Assessment Language (XML)

@item OVDC
Oracle Virtual Desktop Client (Oracle)

@item OVID
Object, View, and Interaction Design

@item OVMF
Open Virtual Machine Firmware (UEFI, QEMU)

@item OVPI
Open View Performance Insights (HP)

@item OVST
OrtsVermittlungsSTelle (DTAG)

@item OWA
Outlook Web Access / App (MS, WWW)

@item OWAMP
One Way Active Measurement Protocol (RFC 3763)

@item OWASP
Open Web Application Security Project (org., WWW)

@item OWB
Oracle Warehouse Builder (Oracle, DWH)

@item OWC
Optical Wireless Communication

@item OWE
Opportunistic Wireless Encryption (IEEE)

@item OWF
Object World Frankfurt (fair)

@item OWG
Optical WaveGuide (LWL)

@item OWL
Object Windows Library (Borland, API)

@item OWL
Ontology Web Language (WWW, W3C)

@item OWL
Open Windows Library (API)

@item OWLDL
Ontology Web Language Description Logic (OWL), "OWL DL"

@item OWORM
Optical Write Once Read Many, "O-WORM" 

@item OWS
OpenGIS Web Service (OGC, Internet)

@end table