http://tttyx2vwp7ihml3vkhywwcizv6nbwrikpgeciy3qrow7l7muak2pnhad.onion/Summary.html
Onion Routing was originally implemented on
Sun Solaris 2.4 including proxies for HTTP (WWW), RLOGIN,
e-mail (SMTP), and FTP. Generation 2 Onion Routing implementation, Tor,
runs on most common operating systems. Onion Routing works in the following way: An application, instead
of making a (socket) connection directly to a destination machine,
makes a socket connection to an Onion Routing Proxy.