Library /sys$common/syshlp/lse$clihelp.hlb READ, Qualifier, /BUFFER  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /BUFFER=buffer-name

    Specifies a buffer into which the file is to be read. If the
    buffer does not exist, it is created for display only (the buffer
    cannot be written back to a file).