SecuritySpace.com Internet Research Reports( October 2001)
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The Secure Web Server Survey across all domains showed that the Apache webserver had a market share increase of 8.82 percent (from September to August). And Apache webserver went from 61.40 percent of the market in August to 61.78% in September.The survey also showed that the top five Apache modules are: PHP, mod_ssl, FrontPage, OpenSSl, and perl. The Secure Web Server Survey across all domains showed that the Apache webserver had a market share increase of 8.82 percent (from September to August). And Apache webserver went from 61.40 percent of the market in August to 61.78% in September.
The Market Share Theft and Upgrade Report provides information based on sites that changed the server product type (e.g. Apache to Microsoft) or revision (IIS/4.0 to IIS/5.0) of their web server from the previous month:
Apache: Gained: 14,512 (0.63% of installed base) Lost: 21,231 (0.91% of installed base) IIS: Gained: 12,751 (1.24% of installed base) Lost: 10,234 (1.00% of installed base)