Google Wave used operational transformation in their protocol[1]. I've always assumed that the lessons learned on Wave got reused in the Google Docs rewrite. [

Google Wave used operational transformation in their protocol[1]. I've always assumed that the lessons learned on Wave got reused in the Google Docs rewrite. [1] http://www.waveprotocol.org/whitepapers/operational-transform http://www.waveprotocol.org/whitepapers/operational-transfor...