What Is The Rshift Key ?

i am trying to learn the shortcut keys and i see things like RShift and Roption. cannot seem to figure these out on my powerbook keyboard. any help would be much appreciated, thanks

RShift & ROption are shift & option keys at the right side of keyboard. Simply shift and option without R are the ones at keyboards left side. And so are with the other keys - those with R in front are located on right side of keyboard, without - on left.