ICHAT

IChat

iChat was an instant messaging software application developed by Apple Inc. for use on its Mac OS X operating system. It supported instant text messaging over XMPP/Jingle or OSCAR protocol; it also featured audio, video and screen-sharing capabilities. It also allowed for local network discussion with users discovered through Bonjour protocols.

The above text is a snippet from Wikipedia: IChat
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!