HP 50g Graphing Calculator - Manual (Page 845)

Page I-1
Appendix I
Command catalog list
This is a list of all commands in the command catalog (‚N). Those
commands that belong to the CAS (Computer Algebraic System) are listed also
in Appendix H. CAS help facility entries are available for a given command if
the soft menu key
@HELP shows up when you highlight that particular command.
Press this soft menu key to get the CAS help facility entry for the command. The
first few screens of the catalog are shown below:
User-installed library commands would also appear on the command
catalog list, using italic font. If the library includes a help item, then the soft
menu key
@HELP shows up when you highlight those user-created commands.