What do cats and programmers have in common?

A: When either one is unusually happy and excited, an appropriate question would be, "did you find a bug?"

Two bytes meet.  The first byte asks, “Are you ill?”
The second byte replies, “No, just feeling a bit off.

Eight bytes walk into a bar.  The bartender asks, “Can I get you anything?”
“Yeah,” reply the bytes.  “Make us a double.”

There are only 10 kinds of people in this world: those who know binary and those who don’t.

How do you know C programmers?
– They always count items starting from zero.