http://osxdaily.com/2012/03/27/making-sense-of-mac-keyboard-symbols/

⌘ is command

⌥ is option

⌃ is control

⇧ is shift

⇪ is caps lock

← is left arrow

→ is right arrow

↑ is up arrow

↓ is down arrow

⇥ is tab

⇤ is backtab

is return

⌤ is enter

⌫ is delete

⌦ is forward delete

⇞ is page up

⇟ is page down

⌧ is clear

␣ is space

⎋ is escape