Copyright is a set of exclusive rights that regulate the use of a particular expression of an idea or information. At its most general, it is literally "the rights to copy" an original creation. In most cases, these rights are of limited duration. Find out more.
Bittorrent is the underlying filesharing and peer-to-peer software that allows the easy transfer of very large files through distributed networks. Bittorrent also provides a "client," which is software program that an end user can use to download files using the underlying bittorrent software.