BitTorrent
Definition:
BitTorrent is a peer-to-peer protocol that allows computers to distribute files. Unlike other file sharing protocols, BitTorrent relies on multiple computers to share tiny pieces of each file. Therefore no one computer has the burden of having to distribute the entire file.
BitTorrent networks are used widely to distribute large music and video files.
Here's a word you may not know...
ringtone
A ringtone is a sound or music clip that replaces the standard ring sound on a mobile phone. Many mobile phones can have multiple ringtones which allows you to associate specific ringtones with specific callers in your mobile phone contact list. Ringtones can be purchased over the Internet and downloaded to your mobile phone or in some cases, ringtones can be purchased directly from your mobile phone.