Section 11,15: BTEST

 BTEST (integer, position)

 A function that returns a logical value of true if the bit within
 the integer specified by position is set to 1 (bit test).  The
 low-order bit is position 0.

 +------+---------+----------+------------+-------------+        
 | Args | Generic | Specific |  Argument  | Result Type |
 +------+---------+----------+------------+-------------+
 |   2  |  BTEST  |   --     | INTEGER*1  | LOGICAL*4   |
 |      |         | BITEST   | INTEGER*2  | LOGICAL*2   |
 |      |         | BJTEST   | INTEGER*4  | LOGICAL*4   |
 |      |see note | BKTEST   | INTEGER*8  | LOGICAL*8   |
 +------+---------+----------+------------+-------------+

 NOTE: BKTEST is only available on AXP systems.