Change: There were only format changes (bold, italics, etc.) in this version. See this version for details. (Word count: 379)

Change: A community of practice is a group of people who do a certain type of work, talk to each other about their work, and derive some measure of their identity from that work D-G Term Definition H-L Term Definition M-Q Term Definition R-Z Term Definition Social network sites We   View changes from previous version. (Word count: 343)

Change: A community of interest involves members of distinct communities of practice coming together to solve a particular problem of common concern.bron: Arias and Fischer, 2000. D-G Term Definition H-L Term Definition M-Q Term Definition R-Z Term Definition Social network sites We define social network sites   View changes from previous version. (Word count: 307)

Change:  may vary from site to site. Bron: Social Network Sites: Definition, History, and ScholarshipdanahDanah m.M. Boyd,School of InformationUniversity of California-Berkeley Nicole B. Ellison Department of Telecommunication, Information Studies, and Media Michigan State University © 2007 Journal of Computer-Mediated Communication   View changes from previous version. (Word count: 225)

Change: We define social network sites as web-based services that allow individuals to (1) construct a public or semi-public profile within a bounded system, (2) articulate   View changes from previous version. (Word count: 188)

Change:  Boundary objects are those objects that both inhabit several communities of practice and satisfy the informational requirements of each of them. Boundary objects are thus   View changes from previous version. (Word count: 117)