1 Subjects: “...Social network...”

2 Subjects: “...Social network...”

3 Subjects: “...social network analysis, social networks...”

4 Subjects: “...Social networks...”

5 Subjects: “...: consumer and user guides::UDB Internet guides and online services::UDBS Social media / social networking...”

6 “... or wearables and online venues like virtual worlds and social networks have penetrated every part of our lives...”