Here are some randomly selected joke topics
Computers
If at first you don't succeed, you must be a programmer.
King Arthur
Why did King Arthur have a round table?
So no one could corner him.
School
What is the most popular sentence at school?
I don't know.
Ham
Why did the ham go to the doctor?
To get cured.
Ghosts
Why do ghosts go to the same place every year for their vacation?
They like their old haunts best!
Baseball
Why is a game of baseball like pancakes?
Because they both need batters.
Santa
How do you know that Santa is good at karate?
Because he has a black belt!
Hills
What do you get if you cross big hills with an electric stove?
A mountain range.
Eggs
Did you hear about the man who stole a truckload of eggs?
He has returned them. Apparently he only did it for a yolk.