Notes I have carried on my PDA or in my Franklin planner for years: Info Mac keys

•Memory check: command-option
• rebuild desktop apple-option
• ext off: shift
• zap pram: apple-option-p-r
• reset PMU: option-control-shift then hold power for 1 second 2655/4600
• start from CD: C
• bypass startup disk: apple-option-shift-del
• extension manager: control?
• external HD: T

Open memory control panel hold option/command to get ram check option

Entourage
• hold shift to rebuild database