Digital Audio Tape (DAT or R-DAT) is a signal recording and playback medium developed by Sony and Philips in the mid 1980s. In appearance it is similar to a compact audio cassette, using 4 mm magnetic tape enclosed in a protective shell, but is roughly half the size at 73 mm × 54 mm × 10.5 mm.

As the name suggests the recording is digital rather than analog, DAT converting and recording at higher, equal or lower sampling rates than a CD (48, 44.1 or 32 kHz sampling rate, and 16 bits quantization) without audio data compression.

This means that the entire input signal is retained. If a digital source is copied then the DAT will produce an exact clone, unlike other digital media such as Digital Compact Cassette or MiniDisc, both of which use lossy data compression.

For the rest of the Wikipedia entry on the above term, go here.

Unfortunately, there are no videos on this word on Youtube, Google Videos or any other. Let us know if you find any other.