ive Environment (Apple)
OCFS Oracle Cluster File System
OCI Object Code Insertion
OCI Operational Cryptography and Interception
OCI Oracle Call Interface
OCL Operator/Operation Control Language
OCLC Online Cataloging/Computer Library Catalog/Center
OCP Optical Storage Processor
OCR Optical Character/Curve Recognition
OCR Oracle Cluster Registry
OCS Object Compatibility Standard
OCS Open Cabling System
OCSP Online Certificate Status Protocol
OCT Object Code Translator
OCTD Observation, Conclusion, Temporary Data
OCX OLE Control Extensions
ODA Open Data Applications
ODA Open/Office Document Architecture
ODAC Open Document Architecture Consortium
ODAM Open Distributed Application Model
ODAPI Open Database Application Programming Interface
ODB Object Oriented Data Base
ODBC Open Data Base Connectivity (Microsoft)
ODBMS Object Oriented Database Management System
ODC Overdrive Circuit
ODCS Open Distributed Computing Structure
ODD Open Data Desktop

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ODE Object Data and Environment
ODE Open Dynamics Engine
ODE Ordinary Differential Equation
ODE OSF Development Environment
ODETTE Organisation for Data Exchange by Tele-Transmission in Europe
ODF On Disk Format
ODF Open Document Format
ODF OpenDoc Development Framework
ODFA Open Document Format Alliance
ODI Open Data-Link Interface (Novell)
ODIF Open/Office Document Interchange Format
ODIMS Open Distributed Information Management System
ODINSUP ODI-NDIS Supplementary Driver
ODL Object Definition Language, Optical Disc Library
ODM Object Data Manager
ODMA Open Document Management API
ODMG Object Database Management Group
ODMR On Demand Mail Relay
ODN Optical Data Network
ODP Open Directory Project
ODP Open Distributed Processing
ODR Optical Digital Reference
ODS Offene Datenschnittstelle
ODS Offenes Deutsches Schulnetz
ODS On Disc Structure (File System)
ODS Open Data Services
ODSI Open Directory Service Interface
ODT On-Die Termination
ODTM Optical Time Division Multiplexing
ODVA Open Device-Net Vendor Association
OE Opportunistic Encryption
OE Output Enable
OEB Open Electronic Book
OEBL Öffentlicher beweglicher Landfunk
OECD Organisation for Economic Cooperation and Development
OEF Origin Element Field
OEM Odd Even Merge (Graph, Netz)
OEM Original Equipment Manufacturer
OES Odd Even Sort (Graph, Netz)
OES Open Enterprise Server (Novell)
OF Overflow Flag
OFA Optimal Flexible Architecture
OFAP Old Fart At Play (Slang)
OFB Output Feedback
OFD Optical Frequency Division Demultiplexer/Demultiplexing
OFDM Orthogonal Frequency Division Multiplex/Multiplexing
OFE Open Financial Exchange

Seite 290
OFET Organic Field Effect Transistor
OFFIS Oldenburger Forschungs- und Entwicklungsinstitut für Informatik-Werkzeuge und -Systeme
OFHC Oxygen Free High Conductivity (Copper)
OFM Optical Frequency Division Multiplexer/Multiplexing
OFS Object File System
OFS Old File System (Amiga)
OFS Output Field Separator
OFTC Open and Free Technology Community
OFTP Odette File Transfer Protocol
OFW Oberflächenwelle
OFX Open Financial Exchange
OGIS Open Geodata Interoperability Specification
OGM Ogg Media
OGSA Open Grid Services Architecture
OGSI Open Grid Services Infrastructure
OH Off Hook
OHA Open Handset Alliance
OHCI Open Host Controller Interface
OHR Over Horizon RADAR
OIC Oh, I See (Slang)
OIC Operator Interface Console
OID Object Identifier (IANA)
OIDC Object Identifier Component
OIDL Object Interface Definition Language
OII (European Commission's) Open Information Interchange (Service)
OIM Object Interaction Model
OIM Office of Information Management
OIM Offline Instant Message
OIM Open Information Model
OIM Operating Instruction Manual
OIM Operations/Operator Interface Module
OIM Optical Interface Module
OIM Oracle Identity Management
OIM OSI Internet Management
OIN Open Invention Network
OIO Open Infrastructure for Outcomes
OIRT Organisation International de Radio et Television
OIS Office/Online Information System
OIT Object Identifier Tree
OIU Operator Interface Unit
OIV Object Identifier Value
OIW OSI Implementors' Workshop
OK Oberer Kanal
OKKSA Offener Katalog für Kommunale Softwareanforderungen
OLALA Open Local Area Linux Applications
OLAP Online Analytical Processing
OLC Online Computer

Seite 291
OLC Optical Link Card
OLE Object Linking and Embedding
OLE Open License for Education
OLED Organic Light Emitting Device/Diode/Display
OLI Open Link Interface (Novell)
OLI Optical Phone Line Interface
OLIT Open Look Intrinsic Toolkit
OLIX On-Line Informationssystem UNIX
OLM Optical Link Modul
OLP Open License Plan/Program
OLPC One Laptop Per Child
OLSR Optimized Link State Routing (Protocol)
OLT Optical Line Termination
OLTC On Line Trace Compression
OLTP On Line Transaction Processing
OLWM Open Look Window Manager
OM Object Manager
OM Old Man (Radioamateur)
OM Optimal Mismatch
O&M Operation and Maintenance
OMA Object/Open Management Architecture
OMA Open Mobile Alliance/Architecture (Cabrio?)
OMAC One-key Message Authentication Code
OMAP Open Multimedia Applications Protocol
OMAP Operation and Maintenance Part
OMC Operation and Maintenance Center
OMCR Operation and Maintenance Center Radio
OMCS Operation and Maintenance Center Switch
OME On-board Modul Extension
OMF Object Management Facility/Framework
OMF Object Module Format
OMF Open Media Framework
OMF Open Source Metadata Framework
OMFS Open Mosix File System
OMG Object Management Group
OMI Open Messaging/Modelling Interface
OMI Open Microprocessor Systems Initiative
OML Object Manipulation Language
OMR Optical Mark Recognition
OMS Object management System
OMT Object Modelling Technique
OMUP Operating and Maintenance User Part
ONAL Off-Network Access Line
ONC Open Network Computing (Sun)
ONCS Open Network Compute Server
ONE Open Net/Network Environment (Sun)
ONI Operator Number Identification

Seite 292
ONM Open Network Management
ONMS Open Network Management System
ONN Open Network Node
ONNA Oh No, Not Again (Slang)
ONNTA Oh No, Not This Again (Slang)
ONP Open Network Provision
ONP Open Network Provision
ONP Open Networking Platform
ONS Object Naming/Numbering System
ONU Optical Network Unit
OO Owner Override
OOA Object Oriented (System) Analysis
OOC Object Oriented Concepts
OOC Out Of Characters (Slang)
OOD Object Oriented Design
OODBMS Object Oriented Database Management System
OOE Objektorientierter Entwurf
OOF Out Of Frame
OOI Object Of Interest (Slang)
OOI Object Oriented Implementation
OOIS Object Oriented Information System
OOK On Off Keying
OOL Object Oriented Language
OON Object Oriented Nonsens
OOP Object Oriented Pleasure/Programming
OOP Out Of Print (Slang)
OOPL Object Oriented Programming Language
OOPS Object Oriented Programming System
OOPS Objext Oriented Proxy Server
OOPS Out Of Phase Stereo
OOPSLA Object Orientied Programming Systems, Languages and Applications
OOSA Object-Oriented Software Architecture
OOT Object Oriented Technology
OOTB Out Of The Box (Slang)
OOTC Obligatory On-Topic Comment (Slang)
OOXML Office OpenXML (Microsoft)
OPA Old Programmers Association
OPA Open Protocol Architecture
OPA Overview Pac Attribute
OPAC Online Public Access Catalogue
OPAL Optische Anschlussleitung
OPB On-Chip Peripheral Bus
OPC OLE for Process Control
OPC Optical Photo Conductor
OPC Optical Proximity Correction
OPC Output Control
OPCAT Object Process CASE Tool

Seite 293
OPD Oberpostdirektion
OPD Original Point of Distribution
OPD Output Driver
OPEN Optical Pan-European Network
OPI Open Prepress Interface
OPI Operator Interface
OPIC Open Programmable Interrupt Controller
OPIE Open Palmtop Integrated Environment
OPL Open Publication License
OPM Object Process Methodology
OPM Operations Per Minute
OPM Output Protection Management
OPML Outline Processor Markup Language
OPN Open Projects Network
OPP Open Publication Policy
OPS Online Programming and Simulation
OPS Open Profiling Standard
OPSEC Open Platform for Security
OPT Open Protocol Technology
OPTA Onafhankelijke Post en Telecommunicatie Autoriteit (NL)
OPUS Octal Program Updating System
OPUS Online Publikationsverbund der Universität Stuttgart
OPUS Overlay Peer Utility Service
OPX Off Premises Extension
OQL Object Query Language
OQPSK Offset Quadrature Phase Shift Keying
OR Operations Research
ORACLE Optional Reception of Announcement by Coded Line Electronics
ORB Object Request Broker
ORBL Open Relay Black List
ORDB Open Relay Data Base
ORG organizational; Internet-Domain: Organisationen in den USA
ORNL Oak Ridge National Laboratory
OROM Optical Read Only Memory
ORP Open Router Project
ORS Open Relay Server
ORS Output Record Separator
ORSN (European) Open Root Server Network
OS Operating System
OS Output Specification
OSA Open Scripting/Services/Solutions/Storage/Systems Architecture
OSA Open System Authentication
OSA Optical Society of America
OSACA Open System Architecture for Controls within Automation Systems
OSADL Open Source Automation Development Laboratory
OSAF Origin Subarea Address Field
OSBF Open Source Business Foundation

Seite 294
OSC On Scene Commander
OSC Open System Center (IBM)
OSC Operating System Command
OSCAR Open System for Communication in Realtime
OSCAR Orbiting Satellite Carrying Amateur Radio
OSCI Online Services Computer Interface
OSD Object-based Storage Device
OSD On Screen Display
OSD Open Software Description (Format)
OSD Open Source Definition
OSDL Open Source Development Lab/Labs, Oregon
OSE Open Systems/Software Environment
OSF Open Software Foundation
OSG Open Science Grid
OSGI Open Services Gateway Initiative
OSI Open Source Initiative
OSI Open Systems Interconnect/Interconnection (ISO)
OSIE Open Systems Interconnection Environment
OSINLCP OSI Network Layer Control Protocol
OSITOP Open Systems Interconnection Technical and Office Protocols
OSL Object Script Language
OSL Open Subscription License
OSM On Screen Menue
OSM Operating System Specific/Service Module
OSNR Optical Signal to Noise Ratio
OSNR Optical Signal to Noise Ratio
OSO Overscan Operation
OSPF Open Shortest Path First (Internet)
OSPI Operating System Programming Interface
OSPM Operating System Power Management
OSQL Object Structured Query Language
OSS Object Storage Server
OSS Open Sound System
OSS Open Source Software/Solution
OSS Operational/Operator Support System
OSSO Open Source Solutions Operation (HP)
OST Object Storage Target
OSTA Optical Storage Technology Association
OSTG Open Source Technology Group
OSTM Open System Transaction Management
OSTP Office of Science and Technology Policy
OSU Officially Sanctionized User
OSU Ohio/Oklahoma/Oregon/Oswego State University
OSU On-orbit Serviceable Unit
OSU Optical Scanning Unit
OSVS Operating System Virtual Storage
OT Object Technology

Seite 295
OT Off Topic (Slang)
OT Open Transport
OT Ordering Table
OTA Over The Air
OTA US Congress Office of Technology Assessment
OTD Optical Time Division
OTDM Optical Time Division Multiplexer/