Abstract: Among other things, we describe identifying, in first data available to a first user and not available to a second user, and in second data available to the second user not available to the first user, data pertaining to a common topic, and enabling the first user and the second user to communicate about the common topic based on the identification.

Abstract: A computer system including a memory, at least one processor coupled to the memory, and a search component executable by the at least one processor is provided. The search component is configured to receive information descriptive of at least one search term; execute a first query against a plurality of documents that identifies at least one first document of the plurality of documents responsive to the at least one search term; identify one or more secondary terms associated with the at least one first document based on occurrence of the one or more secondary terms within the at least one first document; and provide a search result including at least one of the one or more secondary terms and one or more identifiers of one or more documents including the one or more secondary terms. The search result may also include one or more identifiers of bookmarked documents.

Abstract: Among other things, we describe identifying, in first data available to a first user and not available to a second user, and in second data available to the second user not available to the first user, data pertaining to a common topic, and enabling the first user and the second user to communicate about the common topic based on the identification.