8. A computer system for aggregating usage indications for an electronic document, the computer system comprising: one or more processors, one or more computer-readable memories and one or more computer-readable tangible storage devices; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to assign a unique identifier to each segment of a plurality of segments of the electronic document at a time of creation of the electronic document; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to determine usage indication data associated with each segment of the plurality of segments of the electronic document, wherein the usage indication data comprise a measure of time spent using the electronic document; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to aggregate the usage indication data for a plurality of users of the electronic document on a segment by segment basis; and program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to communicate to a user of the electronic document the aggregate usage indication data on a segment by segment basis.
8. A computer system for aggregating usage indications for an electronic document, the computer system comprising: one or more processors, one or more computer-readable memories and one or more computer-readable tangible storage devices; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to assign a unique identifier to each segment of a plurality of segments of the electronic document at a time of creation of the electronic document; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to determine usage indication data associated with each segment of the plurality of segments of the electronic document, wherein the usage indication data comprise a measure of time spent using the electronic document; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to aggregate the usage indication data for a plurality of users of the electronic document on a segment by segment basis; and program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to communicate to a user of the electronic document the aggregate usage indication data on a segment by segment basis. 13. The computer system of claim 8 , wherein the program instructions to aggregate the usage indication data for the plurality of users of the electronic document on a segment by segment basis aggregate the amount of time that each user of the plurality of users spent on each segment of the plurality of segments of the electronic document.