What is your best programmer joke?

On the way to a sales call, a salesman, a project manager, and a programmer were kidnapped. When their employer refused to pay the ransom, the kidnappers granted each a last wish before killing them. The salesman said, "I still want to make the pitch I prepared for today. It's awesome and will only take an hour." The project manager said, "I still want to present my Powerpoint for this project. It's only 92 slides." The programmer said, "Kill me first."

I often use "There are 2 hard problems in computer science: cache invalidation, naming things, and off-by-1 errors."

A couple originals:

- Javascript programmers have no class.

- Psst...did you hear Haskell is stateless? Pass it on.

A Chinese spy manages to steal the last 50MB of the Lisp program governing U.S. missile launches. Fortunately, it was all closing parentheses.