DOS Disk Operating System. But, unfortunately, it is so common that in some instances it is acceptable. In the case of this document, it is purely a case a laziness not to type MicroSoft, or MS so often. In the strictest sense the DOS is the part of the Operating System that handles all communication with the disk drives on the computer. Floppy Drive A disk drive that accepts floppy disks.
Floppy disks are small removable disks that are common to PC 's.
By using a floppy disk, you can move information from one computer to another with no other connection between them. IBM International Buisiness Machines Corporation. When IBM first brought out the IBM PC , it encouraged other computer companies to follow close to the same design. It did not patent the PC architecture itself. Because of this, it was cheap for new computer companies to look at what IBM did and modify it so that thiers was compatable, but not identical.