/sys$common/syshlp/helplib.hlb PRODUCT, SHOW, HISTORY, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  $ PRODUCT SHOW HISTORY * /OPERATION=INSTALL /BEFORE=22-MAY-2000

      The command in this example lists all the products that were
      installed before May 22, 2000.