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

  The UOR function returns an unsigned value of a  binary  logical
  OR  operation on the corresponding pair of bits of two specified
  parameters.

  Syntax:

     UOR( u1,u2 )

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