How many people are using open-source software?
- Linux is believed to have somewhere between 4 and 27 million users
- Apache web server to have over
60% and steadily increasing market share
- The Internet Operating System Counter
(operating system usage on the Internet in Europe) shows Linux is the
most popular Internet-connected operating system.
Indirectly, everybody who sends email or uses the Web is using open-source
software all the time. The running gears of the Internet (its mail
transports, web servers, and FTP servers) are almost all open source.