How do you keep track of your typewriter collection?

Do you keep a simple typewritten list?

Do you use a spreadsheet?

The Typewriter Database?

A period-appropriate card index?

Tags on your machines on the shelves?

Via your blog or web page?

All of the above?

Keep track?!? I enjoy tripping over them all over the house.

Other?

What data do you keep on them?

How big was your collection before you decided you needed to do something?