Section 11,81: SIZEOF

 SIZEOF (arg)

 A function that returns the number of bytes of storage used by the
 argument.
 +------+---------+----------+------------------+-------------+   
 | Args | Generic | Specific |    Argument      | Result Type |
 +------+---------+----------+------------------+-------------+
 |   1  |   --    | SIZEOF   | Anything with a  | INTEGER*4   |
 |      |         |   --     | valid data type, | INTEGER*8   |
 |      |         |          | except assumed-  |             |
 |      |         |          | size arrays or   |             |
 |      |         |          | passed-length    |             |
 |      |         |          | characters.      |             |
 +------+---------+----------+------------------+-------------+

 NOTE: A result type of INTEGER*8 is only available on AXP 
       systems.