What do you have in your bag?

Do you carry a bag to work? If you do, what's in your bag? For essentials, some of us lug a laptop around town; others a good old-fashioned diary or organizer, yet others a PDA, etc. It basically depends on what you do that determines what you have in your bag. For example, athletes and pilots would have gadgets like a pulse oximeter among other sports gadgets and paraphernalia. For ladies, cosmetics are among the essentials. Yes, stockings too.