Really? You actually have to ask? That's pretty sad,kid. Seriously, if you can't figure out something so obvious and SIMPLE, then you should go back to your coloring books instead of trying to operate anything more complex than a flashlight. And they function as money.
Dude, that's harsh. What are you talking about exatly? Caps lock on a computer?
If you're talking about the "CAPS LOCK" key, it's on the left side of the keyboard located between the TAB and SHIFT key's -- on a standard keyboard. There's no such thing as a "STUPID" question. Don't judge.
(VaultWanderer) If you mean Fallout 3 caps, you get them from selling stuff, containers and also from dead people.