VMS Help RUNOFF, file, Parameter  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 filespec[,...]

    Specifies one or more ASCII files (containing text and DSR
    commands) to be formatted by the RUNOFF command. The input file
    type defaults to .RNO; you must specify the file type for .RNT
    and .RNX files. Wildcard characters are not allowed in the file
    specification.

    DSR produces an output file having the same file name as the
    input file. The output file type depends on the input file type.
    The default output file type is .MEM. For a list of input file
    types and the associated output file types, refer to the OpenVMS
    DIGITAL Standard Runoff Reference Manual.

    Specify SYS$INPUT to type the input from your terminal or a
    command procedure; terminate input from the terminal by pressing
    Ctrl/Z.