Original Equipment Manufacturer. A company that gathers components from other manufacturers and sells under their own name. An OEM version of a product is supported by the seller, not the actual manufacturer.

Measure of electrical resistance, inductance or reactance.

The common abbreviation for overhead projector. Used to project transparencies onto a screen or wall. Also used with transmissive LCD panels to project video or data.

Organic Light Emitting Diode. A self-illuminating, energy-efficient, direct-view imaging system. Uses an organic film sandwiched between 2 transparent electrodes.

Transfers digital signals as light pulses. Also called fibre-optic cable and is commonly used to send surround sound from a player to a receiver/decoder.

On Screen Display. Menu shown on display device screen allowing display adjustment without having dedicated physical controls such as knobs or buttons for each adjustable parameter.

A device consisting of a light source, a transmissive or reflective platform, and a focusable lens assembly. An OHP is designed to project images from tranparencies or LCD projection panels onto a screen.

Multiplies outgoing signal samples in order to more easily filter out aliased sounds but doesn’t create fidelity that isn’t there to begin with.

Given as a percentage or pixel count, the amount that a particular display device crops the edges of an incoming video signal. This is done to ensure the image area contains only picture information.