While the name might not be familiar to a lot of you, in geek circles, he's a pretty respected person. He is credited with writing MINIX, the precursor to the Linux kernel.
Most notably for me, I've taken classes that have used his textbook "Computer Networks" (Both Networking I with Kulkarni and Networking II with Ken Reek at RIT)
All I can say is, hot damn, he scooped all of us on that. That's a fine hack you've done there, Andrew.