Better known as 'dmr'. (1941-2011)
The "R" in KernighanAndRitchie or K&R (as in the K&R dialect of "C").
Researcher at BellLabs. KenThompson's main collaborator on the UnixOperatingSystem (see InventorsOfUnix). Invented BeeLanguage and then CeeLanguage as part of the Unix effort. Later involved with PlanNineFromBellLabs, intended as a successor to Unix. Recipient of 1983 TuringAward.