Software
A nice tribute to Dr. Ted Codd by C.J. Date at Database Debunkings. I'm kind of surprised at how little notice/commentary there's been since his death. It's due, I guess, to the relational model currently being out of fashion (until everyone realizes that the OODB-XMLDB-whateverDB nonsense is just hot air and hype and we see a "rediscovery" of relational).