VMS Help PATCH, Qualifiers, /OUTPUT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /OUTPUT[=filespec]

    Indicates the output image file specification. By default, PATCH
    creates an output file with a file specification that consists of
    the current defaults. Use the /OUTPUT qualifier when you want to
    specify an alternate file specification.

    If you omit fields in the file specification, PATCH supplies the
    following default values:

    Field                       Default Value

    device and directory        defaults of current process

    file name                   name of input image file

    file type                   .EXE

    version                     one greater than the most recent copy
                                of the input image file

    The output image file is created only when you issue the PATCH
    command UPDATE at the end of the PATCH session. You can issue
    multiple UPDATE commands in a single session. The first UPDATE
    command creates the output image file; subsequent UPDATE commands
    overwrite this file.

    The asterisk (*)  and the percent sign (%) wildcard characters
    are not allowed in the file specification.