Categories of $ commands

The Dollar Commands can be grouped into major functional categories affecting

Commands for inclusion of comments

LST and other output file contents

Inclusion of external files

Contents dependent compilation

Numerical procedures used

Reset of data for items

GDX files

Compiler procedures

Execution of an external program

Impose data access restrictions

Tear apart strings

Compress and encrypt files

Macro definitions

Include user defined function

Here we list these commands by group then later we define them more precisely.