There are several kind of DOS, but DOS normally referred to Disk Operating System developed by Microsoft Corporation..
Mosdos Ohr Hatorah was created in 1900.
"mosdos" doesn't appear to be a Hebrew word. It could be a name, or possibly an ashkenazic transliteration of a Hebrew word.
most of your bones are created in the.....
The Most Extreme was created in 2002.
Kadin most was created in 1470.
Asparuhov most was created in 1976.
Belenski most was created in 1867.
Nový Most was created in 1972.
HC Most was created in 1951.
The Most of Animals was created in 1993.
Most Shocking was created in 2006.
Most of the Time was created in 1989.