| http://www.w3.org/ns/prov#value | - Access to a Yammer network is determined by a user's Internet domain, so only those with appropriate email addresses may join their respective networks.On September 8, 2008, Yammer launched at the TechCrunch50 conference.In February 2010, the company launched communities", which are networks for which access is not restricted by domain, thus allowing businesses to connect to groups such as custom
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