Integer             Numbers from -32768 to 32767                ordinal type
 Byte                Numbers from 0..255                         ordinal type
 Real                Floating-Point Numbers                      numeric type
 Char                Single Characters                           ordinal type
 Boolean             Logical Values (TRUE, FALSE)                ordinal type
 enumerated          User-Defined Data Type                      ordinal type
 strings             Character Strings                         data structure
 Text                Text Files                                     file type
 arrays              Lists of Variables                        data structure
 records             Collection of Data Fields                 data structure
 sets                Set of Elements                           data structure
 files               External Collections of Data              data structure
 typed constants     Initialized Variables