Record Management Services <operating system> (RMS) Procedures in the {VMS} {operating system} that {programs} call to process {files} and {records} within files. RMS allows programs to issue GET and PUT requests at the record level (record I/O) as well as read and write {blocks} (block I/O). VMS RMS is an integral part of the system software; its procedures run in {executive mode}. (2003-11-11)