Bad software can kill
Medical Devices: The Therac-25 (pdf)
Read it. Especially if you work in software development.
(On an unrelated note, I upgraded my Linux desktop at work today to Fedora Core 2 from Red Hat Linux 8 because I needed a newer version of PHP to test something and it was such a dependency hell (PHP meant upgrading Apache, that meant... etc.) that I figured I may as well just upgrade the box in general. I'm glad I did - lots of stuff bumped, and the new versions seem nicer in general. I'm also playing with Yum for the first time and it seems pretty cool.)
Read it. Especially if you work in software development.
(On an unrelated note, I upgraded my Linux desktop at work today to Fedora Core 2 from Red Hat Linux 8 because I needed a newer version of PHP to test something and it was such a dependency hell (PHP meant upgrading Apache, that meant... etc.) that I figured I may as well just upgrade the box in general. I'm glad I did - lots of stuff bumped, and the new versions seem nicer in general. I'm also playing with Yum for the first time and it seems pretty cool.)