A very old image.

[theweaselking]

I will point out that, today, in 2009, if you go to a store to buy a MacBook "Pro", you *still* get only one mouse button.

EDIT: Several people inform me that modern MacBooks actually *do* have two mouse buttons - that large, flat, undifferentiated single-button surface below the trackpad is actually *two* buttons, and just *looks* like one button.

This is actually *worse* than shipping with only one button from an interface usability perspective. More useful, but *absolutely incredibly* boneheaded. Do you expect your spacebar to actually be "enter" if you press it on the right half?