Here are some randomly selected joke topics
Mistakes
Computers make very fast, very accurate mistakes.
Teachers
Teacher: Where was Magna Carta signed?
Pupil: At the bottom.
Trees
What is white, light and sugary and swings from trees?
A meringue-utan.
Doctors
Doctor: Have you ever had this problem before?
Patient: Yes.
Doctor: Well, you've got it again!
Dog Biscuits
What is the main ingredient of dog biscuits?
Collie flour.
The Truth
Knock, knock.
Who's there?
July.
July who?
July or do you tell the truth?
Soar
It is really difficult to soar with the eagles when you have to work with an office full of turkeys.
Horses
What do you call a horse wearing Venetian blinds?
A zebra.
Vacations
I went on vacation last week. What a week it was. Only rained twice - once for three days, once for four.