Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Knetwit - Knetwit.com was a social networking and study aid website aimed at colleges and universities. Knetwit hosted users' intellectual property and awarded users Koin (internal Knetwit currency) for its distribution. The site provided social networking features such as friend lists and messaging. Through the Knetwit store users could redeem their Koin for goods and cash. The domain knetwit.com expired on 24 March 2011 and has not been renewed.
A:
Company