Introducing PC-DOS and MS-DOS: a guide for beginning and advanced techniques /

gan Sheldon, Thomas.
Cyhoeddwyd 1985

Hard disk management in the PC and MS DOS environment /

gan Sheldon, Thomas.
Cyhoeddwyd 1988

Windows 3 made easy /

gan Sheldon, Thomas.
Cyhoeddwyd 1990

The complete reference to NetWare 5 /

gan Payne, William H., 1937- .
Cyhoeddwyd 1999