Zaka khumi kuchokera pomwe gwero lotseguka la MS-DOS 10 ndi 1.25, Microsoft idalengeza gwero lotseguka la makina opangira a MS-DOS 2.0, omwe adatulutsidwa mu 4.0 ndikupangidwa limodzi ndi IBM. Khodiyo imatsegulidwa pansi pa layisensi ya MIT, yomwe imakupatsani mwayi wosintha, kugawanso ndikugwiritsa ntchito pazogulitsa zanu. Kuphatikiza pa code, zolemba ndi zithunzi za disk zimapezeka poyera.
Mankhwalawa amalembedwa mu assembler for 8086 processors PCem ndi 86box emulators angagwiritsidwe ntchito kuyendetsa. Kutulutsidwa kwa MS-DOS 4.0 ndikodziwika chifukwa chotha kugwiritsa ntchito mawonekedwe azithunzi ndi mbewa, kuthandizira magawo a disk okulirapo kuposa 32 MB (mpaka 2 GB), kuwonjezera kwa woyang'anira fayilo wa DOSSHELL, kuthandizira kwa EMS (Mafotokozedwe Owonjezera a Memory ), FASTOPEN ndi FASTSEEK malamulo.
Source: opennet.ru