OEM: Original Equipment Manufacturer. Company which develops, produces and sells computer and consumer hardware.

Off-Line Editing: Editing that is done using inexpensive, non-broadcast quality equipment to produce an edit decision list (EDL) which will be used later for assembling a broadcast quality program using more expensive, high quality equipment.

OLE: Object Linking & Embedding. Allows users to insert multimedia elements (including video) into Windows applications.

On-Line Editing: Final editing session in wich the finished program master is assembled from the original production material.

Overlay: The ability to superimpose computer graphics over a live or recorded video signal and store the resulting video image on videotape. It is often used to add titles to videotape. In video, the overlay procedure requires synchronized sources for proper operation.

Overscan: Video images generally exceed the size of the physical screen. The edge of the picture may or may not be displayed, to allow variations in television sets. The extra area is called the overscan area. Video productions are planned so critical action only occurs in the center safe title area. Professional monitors are capable of displaying the entire video image including the overscan area.