Q: Why does a flamingo lift up one leg?

A: Because if it lifted both legs it would fall over!

Tech Support: I need you to right-click on the Open Desktop.

Customer: OK.

Tech Support: Did you get a pop-up menu?

Customer: No.

Tech Support: OK. Right-click again. Do you see a pop-up menu?

Customer: No.

Tech Support: OK, sir. Can you tell me what you have done up until this point?

Customer: Sure. You told me to write 'click' and I wrote 'click'.

Caller: I deleted a file from my PC last week and just realised that I need it. So, if I turn my system clock back two weeks, will I get my file back?

A student is sitting at an astronomy lecture in college, when the professor mentions, "In about 15 billion years, the Sun will burn out and all life on Earth will cease to exist."

"Excuse me, professor, did you say five billion years or 15 billion?"

"15 billion."

The student said, "Whew, thanks, because I was really getting worried."