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

 logical-name

    Specifies the logical name assigned to the output file. Use the
    logical name assigned by the OPEN command. In interactive mode,
    specify the process-permanent files identified by the logical
    names SYS$INPUT, SYS$OUTPUT, SYS$ERROR, and SYS$COMMAND. (The
    OPEN command assigns a logical name to a file and places the name
    in the process logical name table.)

 expression[,...]

    Specifies data to be written as a single record to the output
    file. You can specify data items using character string
    expressions, which may be symbol names, character strings in
    quotation marks (" "),  literal numeric values, or a lexical
    function. For more information on string expressions, refer to
    the OpenVMS User's Manual.

    You can specify a list of expressions separated by commas (,);
    the command interpreter concatenates the items into one record
    and writes the record to the output file.

    The maximum size of any record that can be written is less than
    1024 bytes, and the value of any symbol that is specified as part
    of a record cannot exceed 255 characters; however, if you specify
    the /SYMBOL qualifier, the maximum record size is 2048 bytes and
    the value of a symbol can exceed 255 characters.