MS-DOS 1.25

MS-DOS 1.25 is the first version of MS-DOS, released in 1982-08. It was the first version licensed to OEMs beyond IBM or Seattle Computer Products.

It worked with 160KB floppies and did not support folders (all files had to be in the root). The command interpertor supported the following commands:
 * DIR
 * TYPE
 * COPY
 * ERASE
 * RENAME
 * PAUSE
 * REM