operating system, abuse 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?"