The main site was founded on 9 September 1995 by Yi-Chin Tu ( "Dù Yìjǐn"), then a sophomore in the Department of Computer Science and Information Engineering at National Taiwan University. PTT2 was founded in 2000, with the aim of providing a similar system centered around groups and individuals. PTT3, powered by MediaWiki, was founded in 2004 in Washington, D.C., United States for Taiwanese students studying abroad. PTT also provides wiki and blog services for registered users. The PTTwiki service was activated on 5 February 2004 and powered by Tavi wiki system. It is the main wiki service for individuals in Taiwan.