O
 | OAIS Open Arcival Information System
|
| OAM Operations And Management
|
| OBEX OBject EXchange protocol
|
| OC Optical Carrier
|
| OCC Other Common Carrier
|
| OCD Out of Cell Delineation
|
| OCP Order Code Processor Another name for a central processor unit
|
| OCR Optical Character Recognition The computer recognition of printed characters.
|
| ODBC Open Database Connectivity A standard for accessing common databases
|
| ODI Open Data link Interface
|
| ODR Operational Data store
|
| OECD Organisation for Economic Co-operation and Development
|
| OEM Original Equipment Manufacturer
|
| OFDM Orthogonal Frequency Division Multiplexing
|
| OLAP OnLine Analytical Processing
|
| OLE Object Linking and Embedding Enables changes made in one application to be updated in another
|
| OLTP On Line Transaction Processing Real time enquiry / booking generally associated with a database
|
| OMG Object Management Group
|
| OMI Optical Modulation Index
|
| OMT Object Modeling Technique
|
| ONA Open Network Architecture
|
| ONU Optical Network Units
|
| OOB Out Of Bounds
|
| OOP Object Oriented Programming
|
| OPT Open Packet Telephony
|
| OPX Off Premises eXtension
|
| OQPSK Offset Quadrature Phase Shift Keying
|
| OR Optical Receiver
|
| ORB Object Request Broker
|
| OS Operating System The high level software which is used to run other lower level applications
|
| OSD On Screen Display
|
| OSI Open System Interconnection An architecture model developed by the International Standards Organisation ( ISO ) for the design of open systems networks. |
| OSPF Open Shortest Path First
|
| OSS |
Operations Support Systems
| OTDR |
Optical Time Domain Reflectometer
| OTN |
Optical Transfer Node