A file name on the disk is three parts, the name, the extension
and the owner.  The name is six characters, the extension three
characters. The owner name is in two parts, the project name and 
the programmer name.  This is usually written  FILENM.EXT[PRJ,PRG]

Commands to manipulate files:

TYPE <file>	to type a file on the user's terminal
DELETE <file>	deletes the specified file
DIRECTORY	types the names of all of the current user's files
DIRECTORY [PRJ,PRG]  types the names of some other user's files
SPOOL <file>	makes a listing of the file on the line printer