Real-time text chat facilities such as IRC appeared in the late 1980s. Web-based chat and instant messaging software appeared in the mid-1990s. In the late 1990s, the first true web conferencing capability became available and dozens of other web conferencing venues followed thereafter.
A trademark for the term "webinar" was registered in 1998 by Eric R. Korb (Serial Number 75478683, USPTO) but was difficult to defend; it is currently assigned to InterCall.
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