real operating system: n. The sort the speaker is used to.
People from the BSDophilic academic community are likely to issue
comments like "System V? Why don't you use a _real_ operating
system?", people from the commercial/industrial Unix sector are
known to complain "BSD? Why don't you use a _real_ operating
system?", and people from IBM object "Unix? Why don't you use a
_real_ operating system?" Only MS-DOS is universally considered
unreal. See holy wars, religious issues, proprietary, Get a
real computer!
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