1.$ SHOW LICENSE VMSCLUSTER*
      Active licenses on node NODE1:

      ------- Product ID -------- ---- Rating ----- -- Version --
      Product            Producer Units Avail Activ Version Release  Termination
      VMSCLUSTER         DEC          0  0     100    0.0  (none)    14-MAY-2005
      VMSCLUSTER-CLIENT  DEC          0  0     100    0.0  (none)    14-MAY-2005

      $ WRITE SYS$OUTPUT F$LICENSE("VMSCLUSTER")
      TRUE
      $ WRITE SYS$OUTPUT F$LICENSE("NONEXISTENT_PAK")
      FALSE

      In this example, the F$LICENSE function returns TRUE, which
      verifies that the VMSCLUSTER license is loaded on the system.
      In contrast, the status of hypothetical license NONEXISTENT_PAK
      is shown to be FALSE, indicating that it is not loaded on the
      system.

    2.$ WRITE SYS$OUTPUT F$LICENSE("ABC")
      FALSE
      $ WRITE SYS$OUTPUT F$LICENSE("ABC","XYZ")
      TRUE

      In the first instance, no license for product ABC is found from
      the default producer (DEC or VSI). In the second instance, an
      ABC PAK is found for producer XYZ.