ATing 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)