TLAs from OAA through OZZ

OCR

Optical Character Recognition
Computerized method with a (digital) video camera (see CCD) and a lot of complex software to recognize the writing of the computer or from humans (I don't think they have tried reading monkeys writing yet).

OCX

OLE Control eXtension
A component software technology from Microsoft that enables a Windows program to add funtionality by calling ready-made components (submitted by Henrik Stahr).

ODE

Ordinary Differential Equation
A mathematical equation for a function described by its derivatives. See also PDE.

OEP

Old Enthusiastic Programmer
This was a reply from a person (not known to me) to YEP. I must say, this person has a sense of humour.

OLE

Object Linking and Embedding
Insertion of objects (text, graphs, tables, etc) into other documents whereas the receiving document is not responsible for the maintainance of the object. The objects creator program stays responsible. OLE provides a powerful method for cross-linking documents while retaining integrity when documents are updated.

OOP

Object Oriented Programming
Some kind of structured programming which makes reading and understanding a program almost impossible.

OWL

Object Windows Library
An OOP environment developed by Borland for Windows. OWL version 1.0 was a very nice and easy library. Versions 2.0 and higher are realy object oriented and much harder to understand.