Any friend know about ms dos?

MS Dos Stands for Microsoft Disk Operating System the text based operating system, i learned this kind of operating system when i was second grade of junior high school it was about 1996, i use this operating system with 5.25" of floppy disk with 360 KB of space and 3.5" floppy disk with 1.44 MB, when i remember this kind of operatng system many thing happened when i learned, the computer that i use was 286 technology and it was so slow if i compare it wit my computer Pentium 4 1.8 Ghz ff processor

Ya..Its a operating system ..Microsoft Disk Operating System..what else do u wanna know about it.

I used to learn it when I was in lower grades, I dont remember it now.