Systems and methods of the present invention connect a group of users who are involved in a common project. The information on this project will be stored in an electronic document. Each member of the group has an exact copy of the document and the method of this invention is what ensures that such copies are exact. Each user may incorporate modifications into their copy, which will later be shared by the rest after a synchronization stage. Systems and methods further allow the information to be shared between the various members of the group and which include a series of stages during which it is mainly a question of transferring the modifications from a specific user to the rest of the group, thus avoiding the use of a dedicated client-server structure.