Mac OS X: The Missing Manual, Panther Edition

In the Finder

Option--W	Closes all Finder windows
Right arrow, left arrow	Expands or collapses a selected folder in list view
Option-right arrow	Expands a folder in a list view and all folders inside it
Option-left arrow	Collapses folder and all folders inside it
-up arrow	Opens parent folder
Shift-Option--up arrow	Selects the Desktop
-down arrow	Opens the selected icon
Option-click the flippy triangle	Expands or collapses all folders within that window
Tab	Selects next icon alphabetically
Shift-Tab	Selects previous icon alphabetically
-Delete	Moves highlighted icons to the Trash
Space bar	Opens the disk or folder under mouse immediately (during a spring-loaded folder drag)
Shift--Q	Logs out
Shift-Option--Q	Logs out without confirmation box
Shift--Delete	Empties the Trash
Shift-Option--Delete	Empties the Trash without confirmation ...