ArchiCAD released its first file exchange based Teamwork solution in its version 5.1 in 1997 which allowed more architects to work on the same building model simultaneously. A completely rewritten Teamwork "2.0" solution with a new database approach came out in version 13 in 2009 named Graphisoft BIM Server. Since only the changes and differences are sent to the central storage this solution allows remote access to the same project over the internet thus allowing worldwide project collaboration and coordination. E.H.