Sources: Team CoCo on YouTube, Not a Blog [George RR Martin's blog], BBC News
quote: Isn't any system that isn't networked secure? He could have a win7 laptop with no network connection and then toss it in a safe when he isn't working on it.
quote: Seriously, though, an older, more simple OS with no networked connections is something that would provide immense security. Nobody would be able to hack it.
quote: DOS stands for "disc only operating system".
quote: Further, while multiple DOS existed, by that time one particular ly version -- Microsoft's MS-DOS -- had come to dominated nearly all personal computer sales
quote: It seems probable that Mr. Martin had either an MS-DOS 3.3 or an MS-DOS 4.0.1 PC -- let's hope for the latter.
quote: He comments in an appearance on Conan -- comedian Conan O'Brien's hit program