8. An article of manufacture comprising: at least one computer storage medium, computer program instructions stored on the at least one computer storage medium which, when processed by a processing system of a computer, the processing system comprising one or more processing units and storage, configures the computer to comprise: a network interface configured to connect the computer to a computer network, the computer network being connected to a shared storage system, the shared storage system comprising a file system configured to store a plurality of electronic documents and to make the plurality of electronic documents available to a plurality of users; and a processing system comprising one or more processing units and storage, the storage comprising computer program code that, when executed by the processing system, configures the processing system to comprise: an application configured to process user input to modify an electronic document, wherein the electronic document has associated comment data and activity data, wherein the comment data defines a collection of comments and comprises, for each comment, a reference to a location within the electronic document, data indicating a user that added the comment, and content of the comment, and wherein the activity data defines a collection of actions and comprises, for each action, data indicating a type of action, and data indicating a user associated with the action, the application comprising a user interface including: a first output configured to present a representation of the electronic document, a second output configured to present a representation of comments in association with the presentation of the electronic document, based on the comment data associated with the electronic document, and a third output configured to present a representation of actions in association with the presentation of the electronic document, based on the activity data associated with the electronic document; the application being further configured to, in response to an input associated with a presented comment, mark the comment as resolved by setting the value associated with the comment to indicate the comment is resolved and by adding an action to the activity data associated with the electronic document to indicate the comment is resolved; and the application being further configured to, in response to an input associated with a presented action related to a resolved comment, mark the comment as unresolved by setting the value associated with the resolved comment to indicate the comment is unresolved.
8. An article of manufacture comprising: at least one computer storage medium, computer program instructions stored on the at least one computer storage medium which, when processed by a processing system of a computer, the processing system comprising one or more processing units and storage, configures the computer to comprise: a network interface configured to connect the computer to a computer network, the computer network being connected to a shared storage system, the shared storage system comprising a file system configured to store a plurality of electronic documents and to make the plurality of electronic documents available to a plurality of users; and a processing system comprising one or more processing units and storage, the storage comprising computer program code that, when executed by the processing system, configures the processing system to comprise: an application configured to process user input to modify an electronic document, wherein the electronic document has associated comment data and activity data, wherein the comment data defines a collection of comments and comprises, for each comment, a reference to a location within the electronic document, data indicating a user that added the comment, and content of the comment, and wherein the activity data defines a collection of actions and comprises, for each action, data indicating a type of action, and data indicating a user associated with the action, the application comprising a user interface including: a first output configured to present a representation of the electronic document, a second output configured to present a representation of comments in association with the presentation of the electronic document, based on the comment data associated with the electronic document, and a third output configured to present a representation of actions in association with the presentation of the electronic document, based on the activity data associated with the electronic document; the application being further configured to, in response to an input associated with a presented comment, mark the comment as resolved by setting the value associated with the comment to indicate the comment is resolved and by adding an action to the activity data associated with the electronic document to indicate the comment is resolved; and the application being further configured to, in response to an input associated with a presented action related to a resolved comment, mark the comment as unresolved by setting the value associated with the resolved comment to indicate the comment is unresolved. 9. The article of manufacture of claim 8 , wherein the application is configured to present a representation of only unresolved comments.