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Portrait of Douglas McIlroy taken at the NATO conference in Garmisch 1968, courtesy of Brian Randell.

Douglas McIlroy is a professor of computer science, mathematician, engineer and famous programmer. He is known for having invented:

• The pipes and filters architecture of UNIX
• The entire concept of software components
• Several UNIX tools such as spell, diff, sort, join, graph, speak, tr, etc.

• Doug's homepage