Online collaboration systems allow workers to cooperate and communicate with each other even if working in dispersed settings. They enable frictionless sharing of explicit and implicit knowledge. Several applications that implement a support media for team and group collaboration are implemented and already used for a long time. Since some time Peer-to-Peer based tools are a serious alternative to those established applications of client/server type. They seem to provide better services at even lower costs. But there are important but commonly not recognized differences between the particular types of P2P applications. This demands for further research, in particular on nontechnical aspects.
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