Top Ten Software Innovators?

Rsriram asks: "At our company we have named some of the conference rooms with names of software innovators. The names include Ken Thompson, Donald Knuth, Ada Lovelace, Dennis Ritchie. We need to name 10 more rooms and I was wondering who Slashdot readers would think are the top ten software innovators. Not computer hardware but software. I was thinking Von Neumann, and Linus Torvalds would find a mention, What about Watts Humphrey?"