Initialism of Microsoft Disk Operating System, an operating system for IBM-compatible personal computers in the 1980s and 1990s, eventually succeeded by standalone versions of Microsoft Windows.

plural of hen do

(UK, colloquial) fair enough

A set of rules or guidelines that one has to follow in a particular situation; etymologically, a set of things that one should do or not do in such situation.

plural of leaving do

(computing) An application which allows software to run in protected mode, even though the host operating system runs only in real mode.

plural of DOS extender

A city in Spain, in the autonomous community of Andalusia about fifteen kilometres south of Seville.

plural of whoopee-do

plural of whoopee do