== MediaWiki ==
MediaWiki is a popular and free, open-source wiki software package written in
-PHP. It serves as the platform for Wikipedia and its sister projects, which
-deliver content in over 280 languages to more than half a billion people each
-month. MediaWiki's reliability and robust feature set have earned it a large
-and vibrant community of third-party users and developers.
+PHP. It serves as the platform for Wikipedia and the other projects of the Wikimedia
+Foundation, which deliver content in over 280 languages to more than half a billion
+people each month. MediaWiki's reliability and robust feature set have earned it a
+large and vibrant community of third-party users and developers.
MediaWiki is: