Apache Holds Steady in a Changing Web Server Landscape
Once upon a time, the monthly Netcraft Web server survey was nice and boring. Regular as clockwork, it showed the complete dominance of Apache in this sector. Indeed, Apache had been the leading Web server for so long that people tended to take it for granted - to the point where they forgot that here was a clear case of open source trouncing Microsoft, whose Internet Information Services (IIS) offering had only a piffling share.
Microsoft, of course, was well aware of this inconvenient high-profile advertisement for the power of open source, and around about three years ago made a very serious effort to unseat Apache, using every means at its disposal. As the share of IIS steadily rose, and that of Apache steadily fell, it seemed that Microsoft might even manage the trick.