Joke Collection Website - Cold jokes - What does "IBM" mean in this joke?

What does "IBM" mean in this joke?

It was a slip of the tongue!

He originally wanted to say "Look, BMW!", but when he got excited, he changed it to "IBM" which was similar but unrelated. For another example, I originally wanted to say "I want to buy a white towel!", but instead said "I want to buy a melatonin!".

Actually, humor depends on understanding. If you explain it too clearly, it will be meaningless:)