IBM is a large compter company that, amongst other things, developed the Deep Blue chess playing computer which defeated the grandmaster Garry Kasparov in 1996. and Watson which beat human contestants in the general knowledge quiz Jeopardy!.
Used in Chap. 8: page 102; Chap. 17: page 261
Used in glossary entries: Deep Blue, IBM Watson, jeopardy!, Kasparov, Garry