Dear all, I have been searching without success a categorisation / toxonomy of online social systems. I have of course been searching the web but also Science Direct. For instance blogs, wikis, microbloging, OSN, etc. function differently, and have a different role in the web 2.0. Actually, you can even consider that a web 2.0 solution would be able to combine different mechanisms. Are you aware of any paper / theory proposing such as categorisation? Note: Several papers (including one which I am the coauthor) provide an inventory and a short description of the different types of systems (for instance in education science Procedia in 2009 has a couple of them, and there is a recent report from IPTS Sevilla about usage of Learning 2.0), but they do not really try to make a categorisation in order to compare their characteristics. Thanks in advance for references you may be aware of something. Bye, Thierry Thierry Nabeth Senior Research Fellow, Research Project Proposals INSEAD http://www.insead.edu/ Tel: 33 1 6072 4312 Mob: 33 6 3092 0639 Fax: 33 1 6074 5550 http://www.calt.insead.edu/?thierry.nabeth <http://www.calt.insead.edu/?thierry.nabeth>