2.2.1-5 Abbreviation of Commands

Users should be allowed to abbreviate commands.

Additional Information:
Entries should not exceed 7 characters. Users should be required to enter only as many characters as needed to uniquely identify the desired command. For example, if a "P" uniquely identifies a print command (i.e., no other commands start with "P"), then a user should be able to enter PRINT, or PR, or P to initiate printing.