6. The method of claim 1 , wherein the updating, the receiving of the spoken natural language content request, the identifying of the list of presentation source files, the receiving of the input identifying the presentation source file, and the adding of the presentation source file all occur as the presentation device presents the presentation.
1. A method comprising: updating a grammar based on a searchable plurality of presentation source files stored on a storage device connected to a presentation device via a network, to yield an updated grammar, wherein the searchable plurality of presentation source files is processed by extracting content from each searchable presentation source file to generate: (1) a web-based form of each searchable presentation source file; (2) a list of key phrases; and (3) a corpus of all sentences that appear in all the searchable presentation source files; receiving, from a user, a spoken natural language content request for a presentation source file from the searchable plurality of presentation source files; identifying a list of presentation source files in the searchable plurality of presentation source files, wherein the list of presentation source files is identified by using the updated grammar; receiving, from the user, input identifying the presentation source file from the list of presentation source files, wherein the input is in a modality distinct from speech; and adding the presentation source file to a deck for use in a presentation using the presentation device.