Skype - Wikipedia, the free encyclopedia
1 History 1.1 Microsoft acquisition 2 Features 3 Usage and traffic 4 System and software 4.1 Client applications and devices 4.2 Protocol 4.3 Protocol detection and control 4.4 Audio codecs 4.5 Video codecs 4.6 Skype Qik 5 Security and privacy 5.1 Service...