1      Commands are your principal means of telling Multics what to do.  To
 2 issue commands, you must have Multics at "command level".  Command level is
 3 indicated by a "ready message" which looks like:  r 10:05 12.086 945.
 4 Whenever you have such a line at the left hand side of the terminal screen,
 5 just above the "cursor," you can type a command.
 6 
 7      Most commands take "arguments" that specify what they're to perform their
 8 function on or how they're to perform their function.  For example, the print
 9 command requires a "pathname" argument to tell it what to print.  The line:
10 
11 print my_segment
12 
13 invokes the print command to print the contents of my_segment.  An argument
14 that specifies how the command is to function is called a "control argument".