An acronym is an abbreviation of the first letters of a phrase or the long name of an organization that forms a word or conveys a message. In electronic communication or online documents, acronyms are used as writing shorthand or a method to communicate humor. Below, you will find an alphabetical listing for hundreds of computer related acronyms. 

[A][B][C][D][E][F][G][H][I][J][K][L][M][N][O][P][Q][R][S][T][U][V][W][XYZ]

[O]

OA - Object Adapter
OAM - Object Attribute Memory
OAM - Operations Administration and Maintenance
OAW - Optically Assisted Winchester
OBEX - OBject EXchange
OBIT - Oil Burner Ignition Transformer
OC - OverClocking
OC - Oudin Coil
OCI - Optical Couple Insulator
OCR - Optical Character Recognition
OCTEK - OCean TECHnology
ODBC - Open DataBase Connectivity
ODI - Open Data-link Interface
OEM - Original Equipment Manufacturer
OFDM - Orthogonal Frequency Division Multiplexing
OGM - OutGoing Message
OH - Off Hook (modem)
OLAP - OnLine Analytical Processing
OLE - Object Linking and Embedding
OLTP - On-Line Transaction Processing
OMG - Object Management Group
OMG - Open Management Group
OOP - Object Oriented Programming
OPC - Optimum Power Calibration
OPC - Originating Point Code
OPEC - Organization of Petroleum Exporting Countries
OpenAL - Open Audio Library
OpenGL - Open Graphics Library
ORB - Object Request Broker
OS - Operating System
OSD - On Screen Display
OSI - Open Systems Interconnection
OSM - Output Switch Matrix
OSTA - Optical Storage Technology Association
OTDR - Optical Time Domain Reflectometry
OTP-ROM - One Time Programmable Read Only Memory
OVAL - Object Visual Application Language
OU - Organizational Unit
OUI - Offline Usenet Interface