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

       /NAME=job-name

    Names the job. The job name must be 1 to 39 alphanumeric
    characters. The SHOW ENTRY and SHOW QUEUE commands display the
    job name. For batch jobs, the job name is also used for the batch
    job log file. For print jobs, the job name is also used on the
    flag page of the printed output.

    The default job name is the name of the first file in the job.