System (Tools 5.0) (System 4.2, Finder 6.0) - Sticky Keys - lets you type key combinations one at a time instead of having to press the keys simultaneously.
(Be sure the Easy Access icon is in your System folder on your startup disk.) Turn Sticky Keys on by pressing the shift key 5 times. (Don't move the mouse while you doing this or you will have to start all over again.) To turn Sticky Keys off press the shift key five times again or press COMMAND-OPTION.