High Quality Content by WIKIPEDIA articles! µTorrent (or uTorrent; commonly abbreviated as "µT" or "uT") is a free, ad-supported, closed source BitTorrent client owned by BitTorrent, Inc. It is the most widely used BitTorrent client outside China (where Xunlei is more popular.) It gets the "µ"(greek letter "mu") in its name from the SI prefix "micro-", referring to the program`s small memory footprint: the program was designed to use minimal computer resources while offering functionality comparable to larger BitTorrent clients such as Vuze or BitComet. The program has received consistently good reviews for its feature set, performance, stability, and support for older hardware and versions of Windows.