(HP48) Beginner questions about RPL

[Gil]

For the special characters like Greek m (mu).

Type the ShiftGreenKey, then MinusSign (you get the character ").
Type AlphaKey, then ShiftGreenKey, then 'Key (the key left to STOkey)
and Press ENTER key (you get "Greek mu").

Now press AlphaKey twice (to block characters/letters in a row)
and write the letters NUM (N is EVALkey, I is TANkey, M is the key left of STOkey)
and Press ENTER key (you get the character NUMBER 181).

Now with 181 in the Stack level 1
again press AlphaKey twice (to block characters/letters in a row)

and write the letters CHR (C is AlphaKey and Ckey, H is AlphaKey and PRGkey and R is AlphaRightArrowKey)
and Press ENTER key (and you get "mu" in quotation mark).

The HP50G has a helpful alphabetical catalogue of the commands that you can pick up directly instead of taping the letters.