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Jargon Buster - O

Optical Digital Out
This allows a very high connection to another digital device such as a CD/Minidisc recorder or Digital-capable amplifier.

Optical Zoom
Unlike a digital zoom, the lens physically moves to give magnification to the image with no loss of clarity. This is used to appear to bring the subject of your pictures closer.

OSD
On Screen Display - the digits in the corner of your television to let you know the volume and channel etc.