number of users who have registered and created an account on the indicated site.
d The figures in this column also come from the Statistics page of the indicated site and are current as of January 15, 2010. The figures represent the number of registered users who have edited the site within the preceding 30 days.
e Snapshots of the complete database of each of the listed sites are made available for download periodically at download.wikimedia.org. Snapshots are not prepared for each site according to the same schedule; thus, it is not possible to compare the size of each of the listed sites as of a single common date. The relative sizes of the download archives, however, is generally reflective of the quantity of content available at each site listed. The sizes listed represent the size of the complete database (with all editing history intact) as a single compressed file, in gigabytes (GB) or megabytes (MB), as indicated. The quoted figures are taken from the following snapshot dates: Oct. 22, 2009 (Wikipedia); Jan. 8, 2010 (Wikimedia Commons); Jan. 10, 2010 (Wikinews and Meta-Wiki); Jan. 11, 2010 (Wikisource); Jan. 12, 2010 (Wikiversity); and Jan. 13, 2010 (Wiktionary, Wikibooks, Wikispecies, and Wikiquote).
