Abstract: Managing contact information includes a first user identifying at least one other user in response to the first user encountering the other user, the first user obtaining contact information from the other user, where the contact information is transmitted to a mobile device of the first user, automatically supplementing the contact information from the other user with additional information about at least one of: additional information about the other user provided from outside the mobile device, a record of encounters between the first user and the other user, and a record of other people present at encounters between the first user and the other user, and storing, in a personal contact space of the first user, the contact information from the other user and the additional information, where the personal contact space is provided by storage of the mobile device.

Abstract: Managing electronic notes includes storing data for at least one of the electronic notes, determining at least one particular action to be performed based on the content of the at least one of the notes, and automatically performing the at least one particular action. The at least one particular action may be determined automatically based on data stored in the at least one of the notes or may be determined by a user providing input to select an action. Actions may be recommended to a user based on at least one of: the extracted terms and the additional online information. Managing electronic notes may also include storing additional data and instructions to perform the at least one particular action.

Abstract: Sharing modifications of a document among a plurality of authors includes publishing the document using a service that is accessible by at least some of the authors and propagating modifications by a first one of the authors to other ones of the authors by sending change information to the other one of the authors, wherein the change information includes a pointer to the document, an indication of the modifications, and an identification of the first one of the authors and wherein the change information does not include the document. The service may be a cloud service. Change information may be sent using email. The identification of the first one of the authors may include a routing ID, where the routing ID facilitates locating the first one of the authors on the Internet. The routing ID may be an email address of the first one of the authors.