RCA

1. Radio Corporation of America. Website.

2. Also known as a phono plug, a two-conductor, un-balanced audio (and sometimes video) connector.
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Some colors are standardized:
If Black or Silver, could be anything.
If a pair of Red and White (or Red and Black) as stereo audio, Right on Red and Left on White/Black.
Yellow is composite video.
If a trio of Red/Green/Blue, is component video.