*** I/O COMMANDS ***
 A                              ASCII Input
 B                              BEEP
 F                              Function Output
 K                              Keyboard Input
 N                              Numeric Input
 P                              Prompt
 Y                              Receive from Port
 T                              Time Append & Set
 X                              Transmit out Port
 U                              Unedited Input
 V                              Universal Input
 *** DATA MANIPULATION COMMANDS ***
 C                              Convert
 D                              Define Numeric
 D                              Define String
 I                              Insert
 O                              Open File
 R                              Record
 *** PROGRAM CONTROL COMMANDS ***
 :                              Comment
 E                              End
 G                              Conditional Numeric GOTO (If...Then)
 G                              Conditional String GOTO (If...Then)
 G                              GOTO (Unconditional)
 H                              File Position Find
 H                              File Position Set
 L                              File Lookup
 S                              Conditional Numeric Subroutine Call
 S                              Conditional String Subroutine Call
 S                              GOSUB (Unconditional)
 Q                              Conditional Numeric Subroutine Quit
 Q                              Conditional String Subroutine Quit
 Q                              Quit Subroutine and Return
 W                              Wait
 Z                              Execute Reader Command
 .                              Label