1      Most Multics "commands" and "control arguments" have short names to
 2 facilitate typing.  These short names are listed in the command descriptions,
 3 which you can obtain with the help command or by looking them up in the
 4 printed manuals.  The short names can be used anytime in place of the full
 5 names.  Let's take the list command as an example.  Its short name is ls,
 6 and most of its control arguments also have short names.  In the "command line"
 7 below, can you tell what the control argument -dir stands for?
 8 
 9 ls -dir
10 
11 This is the list command invoked to list directories.