Every software engineer should be aware of the RISKS digest (aka USENET's comp.risks).
The mailing list and digest just celebrated it's 30th birthday in August. There's an incredible wealth of history here regarding bugs, related issues, and the overall risks of our dependency on computers in society.
RISKS broke most of the major stories of the day including the Morris Worm, the AT&T Long Distance collapse, the Mars Climate Orbiter unit error, the Mars Pathfinder priority lockup, the Therac-25, the first email spam, the Pentium FDIV bug, and thousands of other interesting, amusing, and/or scary bugs.