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Web 2.0 is a Registered Service Mark
"Web 2.0" is a registered goods and services mark of CMP Media LLC and is used, without permission, to describe their brand of next-generation web conference.
The term "Web 2.0" cannot be used for the arranging and conducting of live events, namely, trade shows, expositions and business conferences in various fields, namely, computers, communications, and information technology, without the express permission of CMP Media LLC.
And let's face it: at this point, who in their right mind would want it?