I can barely keep track of all the Web server versions that Microsoft has paraded past us through the years. And each new iteration seems to require a move to a new OS. Is it any wonder that so many Microsoft Internet Information Server (IIS) 4.0 shops want to stay put? But no matter how much you want to hold on to IIS 4.0 (despite its quirks), I know of at least four reasons why you should move on to Internet Information Services (IIS) 5.0.

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