Yahoo! Messenger dates back to Yahoo! Chat, which was a public chat room service. The service also offered VoIP, file transfers, webcam hosting, a text messaging service, and chat rooms in various categories. Yahoo! Messenger was provided free of charge and could be downloaded and used with a generic 'Yahoo ID' which also allowed access to other Yahoo! services, such as Yahoo! Mail. Yahoo! Messenger (sometimes abbreviated Y!M) was an advertisement-supported instant messaging client and associated protocol provided by Yahoo!.
Instant messaging client and Internet phone Windows, Windows Mobile, macOS, BlackBerry OS, FreeBSD, Solaris, SunOS
