The invention concerns using multiple computers to hold a conference. Under the invention, an application program can run on a single computer, yet remote participants can issue commands to the program. Remote participants can watch the program operate, because the invention replicates the ...http://www.google.de/patents/US5717856?utm_source=gb-gplus-sharePatent US5717856 - Method of operating multiple computers by identical software running on every computer with the exception of the host computer which runs shared program in addition 
