When process priorities are suitably adjusted , it may approach real - time operating system characteristics .
OpenVMS is a multi-user , multiprocessing virtual memory - based operating system ( OS ) designed for use in time - sharing , batch processing , and transaction processing .
When process priorities are suitably adjusted , OpenVMS may approach real - time operating system characteristics .
OpenVMS is a multi-user , multiprocessing virtual memory - based operating system ( OS ) designed for use in time - sharing , batch processing , and transaction processing .