< operating system > (DOS) The name of a number of operating systems which include facilities for storing files on disk. Such a system must handle physical disk I/O, the mapping of file names to disk addresses and protection of files from unauthorised access (in a multi-user system).
DISK OPERATING SYSTEM
Meaning of DISK OPERATING SYSTEM in English
FOLDOC computer English dictionary. Английский словарь по компьютерам FOLDOC. 2012