YAMMER

Computer software for sending and receiving electronic messages

On-line business networking services

Transmission of messages; message sending, receiving and forwarding; electronic mail and messaging services; instant messaging services

On-line non-downloadable software for sending and receiving electronic messages; computer services, namely, creating an on-line community for registered users to participate in discussions, get feedback from their peers and co-workers, form virtual communities, and engage in social and business networking

On-line social networking services