FastMail.FM: Opera Software, Internet Message Access Protocol, SSL, WebDAV, LDAP, Sieve (mail filtering language)

e mail Filtering: mail, Anti spam techniques (e mail), Software, SMTP Proxy,...

GroupDAV: Communications Protocol, WebDAV, CalDAV

Skinny Call Control Protocol: Selsius Systems, Voice Over Internet Protocol, Mail Standard

Internet Control Message Protocol: Protocol Suite, Operating system, Transmission Protocol, User Datagram Ping, traceroute