... The TWiki is a Web-based collaboration platform. It looks like a normal Internet web site, but everybody can change pages or add content by just using a browser. ... The TWiki is a web-based collaboration tool that offers the possibility to use a web site like an enhanced white-board. ... The astronomy-related TWiki sites considered in this paper have all seen a constant increment both in the number of visitors and users, as well as in the amount of pages created/updated and files uploaded. ...