| OASIS | Stands for "Organization for the Advancement of Structured Information Standards... |
| OCR | Stands for "Optical Character Recognition." This technology is what allows you to... |
| ODBC | Stands for "Open Database Connectivity." With all the different types of databases... |
| OEM | Stands for "Original Equipment Manufacturer." This refers to a company that... |
| Offline | When a computer or other device is not turned on or connected to other devices, it... |
| OLAP | Stands for "Online Analytical Processing." OLAP allows users to analyze database... |
| OLE | Stands for "Object Linking and Embedding." It can be pronounced as "O-L-E," or... |
| Online | In general, when a machine is "online," it is turned on and connected to other... |
| OOP | Stands for "Object-Oriented Programming." OOP (not Oops!) refers to a programming... |
| Open Firmware | Open Firmware is a type of firmware that some computer systems use when they boot... |
| Open Source | When a software program is open source, it means the program's source code is... |
| OpenGL | OpenGL, or the Open Graphics Library, is a 3D graphics language developed by... |
| Operating System | Also known as an "OS," this is the software that communicates with computer... |
| Optical Drive | In the real world, "optical" refers to vision, or the ability to see. In the... |
| Optical Media | Media, in the computer world, refers to various types of data storage. For... |
| OSD | OSD is short for "On Screen Display." An OSD is an onscreen menu included with... |
| OSPF | Stands for "Open Shortest Path First." OSPF is a method of finding the shortest... |
| Outbox | An outbox is where outgoing e-mail messages are temporarily stored. While you are... |
| Output | Data generated by a computer is referred to as output. This includes data produced... |
| Output Device | Any device that outputs information from a computer is called, not surprisingly, an... |
| Overclocking | For some people, fast is never fast enough. In the world of computers, a fast... |
