positive reviews, scoring over four of a possible five in a poll of approximately 200,000 users downloading from Google. 139 For instance, Meta-Wiki provides important statistics on all language editions of Wikipedia, and it maintains a list of articles every Wikipedia should have. Retrieved December 4, 2007. It was met with much rejection and criticism, and was described as "slow and buggy". As of February 2014 it has 15,000,000 items and 1,000 properties for describing them. "Wikipedia turned into book". Retrieved April 16, 2014. 106 Community Main article: Wikipedia community Each article and each user of Wikipedia has an associated "Talk" page. "Can History be Open Source? 355 356 Studies related to Wikipedia has been using machine learning and artificial intelligence to support various operations. Wikipedia U: Knowledge, authority, and a liberal education in the digital age. Ahrens, Frank (July 9, 2006). "Wikipedia cofounder Jimmy Wales on 60 Minutes".