O

OA&M

Operations, Administration & Maintenance

OBP

Open Bridging Protocol

OC-1

Optical Carrier level 1 (51.84 Mb/s)

OC-3

Optical Carrier level 3 (155 Mb/s)

OC-12

Optical Carrier level 12 (622 Mb/s)

OC-48

Optical Carrier level 12 (2.4 Gb/s)

OCR

Optical Character Recognition

OCWR

Optical Continuos Wave Reflectometer

OD

Outside Diameter

ODA

Office Document Architecture (ISO 8613)

ODBC

Open Data Base Connectivity

ODI

Open Data-Link Interface (Netware)

ODIF

Office Document Interchange Format (ISO 8613)

OEIC

OptoElectronic Integrated Circuit

OEM

Original End-product Manufacturer

OIG

OSPF Interoperability Group

OLTP

On Line Transaction Processing

OLE

Object Linking and Embedding

OMG

Object Management Group

OMT

Ortho Mode Transducer (satellite)

ONU

Optical Network Unit

OODB

Object Oriented Data Base

OOP

Object Oriented Programming

OpAmp

OPerational AMPlifier

OPGW

overhead OPtical Ground Wave

OPI

Open Prepress Interface

OQPSK

Offset Quad Phone Shift Keying

ORB

Object Request Brokers

ORL

Optical Return Loss

OS

Operating System

OSF

Open Software Foundation

OSI

Open Systems Interconnection (ISO 7498)

OSPF

Open Shortest Path First

OSS

One-Stop Shopping

OTDR

Optical Time Domain Reflectometer