Here are some randomly selected joke topics
Exits
Exits are on the way out
Teddy Bears
What do you call a poster advertising the last teddy for sale?
A one ted poster.
Cats
What do you call a cat that tells jokes?
A witty kitty.
Police
Why don't the police ever arrest skeletons?
Because it's difficult to pin anything on them.
Computers
What do computers like to eat when they are hungry?
Chips.
Government
What is the difference between men and government bonds?
The bonds mature.
Cavemen
One caveman said to the other, 'What's that big thing with the long neck writing Jane Eyre?'
The other one said, 'That's Bronte-saurus.'
Cricket
Patient: Doctor, you must help me, I've gone crazy about cricket.
Doctor: How's that?
Patient: Not out!
Dogs
What type of dog wears a uniform and a badge?
A guard dog.