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

  $ UIC = F$USER()
  $ SHOW SYMBOL UIC
    UIC = "[GROUP6,JENNIFER]"

      In this example, the F$USER function returns the current user
      identification code and assigns it to the symbol UIC.