[JusPasenThru]

Darn it, you beat me to it. I love that joke.

There are 10 types of people, those who understand binary, and those who don’t.

[SoothingDave]

What do you get when you cross an elephant with a mountain climber?

You can’t. A mountain climber is a scalar.

[ShadowAce]

There are 10 types of people, those who understand binary, and those who don’t.

...and those who don't understand that this is a tertiary joke.

[Robwin]

There are 10 types of people, those who understand binary, and those who don’t.

That reminded me of a joke ascribed to humorist Robert Benchley (famous during 20s-40s): There are two types of people in this world. Those who divide people into two types and those who don't.

I really enjoyed this thread and thankful to all who contributed but especially to those who explained the ones I did not get. As corny as some of them were, it was a laugh out loud experience.