BitTorrent is a peer-to-peer protocol designed to transfer files. Users connect directly to send and receive portions of a file, while a central tracker coordinates the action of all peers and manages connections without knowledge of the contents of the files being distributed. With BitTorrent, users upload at the same time they download, so network bandwidth is managed as efficiently as possible. BitTorrent is designed to work better than other file-transfer protocols as the number of people interested in a certain file increases.
New in 3.9.0:
* All new queue-based user interface
* Remembers what it was doing across restarts
* Includes an improved .torrent maker with the regular install
* Single port: launchmany can seed many files from a single port and thread
* Better performance
* completedir no longer exists, use btmaketorrentgui or btmaketorrent
* License has changed to the BitTorrent Open Source License
* Torrent fields are correctly created and interpreted as utf8
* BitTorrent packets are marked as bulk data to make traffic shaping easier
* Too many little things to list