Ken Thompson and Dennis Ritchie with PDP-11. 1972

Ken Thompson and Joe Condon in front of Belle chess computer. 1985

Plan 9 team. 1995

Brian Kernighan and Rob Pike.

Ken Thompson and Dennis Ritchie with President Clinton. 1998

Ken Thompson with Claude Shannon. 1980

Dennis Ritchie and Ken Thompson.

Ken Thompson and Joe Condon (Dennis Ritchie is visible). 1977