9. A system comprising: a processor; and a computer-readable storage device storing instructions which, when executed by the processor, cause the processor to perform operations comprising: analyzing an audio stream of an utterance of a user to identify topics in the audio stream; identifying tags related to the topics to yield identified tags; identifying content of a document associated with the user; and based on the tags, the topics, and the content of the document, generating a tag recommendation for tagging the audio stream.
9. A system comprising: a processor; and a computer-readable storage device storing instructions which, when executed by the processor, cause the processor to perform operations comprising: analyzing an audio stream of an utterance of a user to identify topics in the audio stream; identifying tags related to the topics to yield identified tags; identifying content of a document associated with the user; and based on the tags, the topics, and the content of the document, generating a tag recommendation for tagging the audio stream. 10. The system of claim 9 , wherein the computer-readable storage device stores additional instructions which, when executed by the processor, cause the processor to perform further operations comprising sending the tag recommendation to a device associated with a user to be presented to the user as a recommendation for tagging the audio stream.