Define the structure of a program and its variables and specify the
  executable instructions to be performed by the program.

  Additional Information (explode) :

• Categories
• %ACTIVATE
• %Assignment
• Assignment
• ALLOCATE
• BEGIN
• CALL
• CLOSE
• %DEACTIVATE
• %DECLARE
• DECLARE
• DELETE
• %DICTIONARY
• %DO
• DO
• %END
• END
• ENTRY
• %ERROR
• %FATAL
• FORMAT
• FREE
• GET
• %GOTO
• GOTO
• %IF
• IF
• %Null
• Null
• %INCLUDE
• %INFORM
• LEAVE
• %LIST
• %NOLIST
• ON
• OPEN
• %PAGE
• %PROCEDURE
• PROCEDURE
• PUT
• READ
• %REPLACE
• %RETURN
• RETURN
• REVERT
• REWRITE
• SELECT
• %SBTTL
• SIGNAL
• STOP
• %TITLE
• %WARN
• WRITE