Retaining intermediate states of shared groups of objects and notification of changes to shared groups of objects

摘要

A method of sharing a group of one or more objects between a plurality of users, the method comprising providing the group of one or more objects to each user; allowing at least one user to effect a change to an object; providing each change effected by a user to the other users; and providing each user with an indication of all changes made to an object. In addition or instead, the method may comprise providing a notification to the other users of the change. The group may be a calendar and each object may be an event in the calendar.