VMS Help PASCAL, Predeclared Routines, Arithmetic, UAND  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The UAND function returns an unsigned value  that  represents  a
  binary  logical AND operation on each corresponding pair of bits
  of the specified parameters.

  Syntax:

     UAND( u1,u2 )

  The parameters 'u1' and 'u2' must be unsigned.