O

object

In the narrow sense, an object is an instance of a class.

object-oriented programming

A programming style (often with specific programming language support) that features encapsulation of data and algorithms, inheritance, and polymorphism.

offset

1. The distance, in bytes, between the start of a data structure and a certain field in the data structure. 2. In a GtkTextBuffer object, the distance between two positions in the text, in characters (not bytes).

OMF

Open Metadata Framework. A standardized XML format for document metadata. ScrollKeeper uses OMF to describe help files.

OOP

See object-oriented programming.

ORB

Object Request Broker. The CORBA server that manages the message transfer between clients and servers.

ORBit

The ORB implementation in GNOME.