Section 11,26: DIM

 DIM (number, number)

 A function that returns the value of the first argument minus the
 minimum (MIN) of the two arguments.

 +------+---------+----------+------------+-------------+        
 | Args | Generic | Specific |  Argument  | Result Type |
 +------+---------+----------+------------+-------------+
 |   2  |  DIM    |   --     | INTEGER*1  | INTEGER*1   |
 |      |         | IIDIM    | INTEGER*2  | INTEGER*2   |
 |      |         | JIDIM    | INTEGER*4  | INTEGER*4   |
 |      |see note | KIDIM    | INTEGER*8  | INTEGER*8   |
 |      |         | DIM      | REAL*4     | REAL*4      |
 |      |         | DDIM     | REAL*8     | REAL*8      |
 |      |see note | QDIM     | REAL*16    | REAL*16     |
 +------+---------+----------+------------+-------------+

 NOTE: KIDIM is only available on AXP systems.
       QDIM is not available in DEC Fortran.

 See also the IDIM intrinsic function.