What is Dos?

DOS is a "Disk Operating System". That means it is simply: "a System for Operating the Disks". We use Dos to organise data files, load and execute (run) program files, and control the input and output devices attached to the computer. There are other brands of DOS besides the most well known "MS-DOS", ie: PC-DOS, DR-DOS/OPENDOS. Generally speaking, they will all function in the same way, especially at the most simple level.