TRACKING CHANGES IN ON-LINE SPREADSHEET

A computer-implemented method for method for tracking changes in an internet-accessible document is disclosed. The method includes providing, with a presentation server system, data for producing a display of a document at a client computing device; receiving, at the presentation server system from a data server system, a timestamp that is sent by the data server system in response to an indication by a user of the client computing device to record changes to the document, wherein the timestamp indicates a time after which changes have been made to the document; and providing from the presentation server system to the data server system data indicating changes made to the document since a time corresponding to the timestamp.