What was the initial name of the software that eventually became MediaWiki, and what year was it first deployed on Wikipedia?

Gyaanipedia
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The software that would become MediaWiki was originally named Phase II. It was written by Magnus Manske in PHP to specifically address the limitations of UseModWiki. The Phase II engine was first deployed on the main Wikipedia site in January 2002, marking a significant milestone in the platform’s development.

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