The most widely recognized piece of music by Steve Reich is probably Electric Counterpoint Part 3 [1] because it was sampled by The Orb for the 1990 ambient dub hit Little Fluffy Clouds.

("Sampled" is maybe a generous expression -- "ripped off" might be more like it, considering that Reich's piece provides the entire structure of the song.)

[1] https://www.youtube.com/watch?v=_TKVpUSWCug