"Choose your destiny ... pointers victory ... Tux ... Beastie ... Bill (what the f*** ... Bill ?!) :) ... POSIX Kombat !"
There are many Operating Systems (DOS, Windows, UNIX).
More or less they do the same ... it depends by what you need.
As Mike Gancarz said, DOS tries to bring "a taste of the mainframe" to the desktop.
It is very small and efficient (ok, ok ... memory management isn' t so good and the file system sucks), but it is also very simple and fast to use.
For a modern implementation ... FreeDos
Nothing to say ... do you remember a sort of ... blue screen ?
A monument to knowledge.
Linux Solaris FreeBSD QNX
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