In this piece for the journal IEEE Multimedia, Christian and I enumerate some of the basic types of multimodal interaction, with examples drawn from actual or theoretical Human-Machine Interfaces (HMIs) for vehicles.
Spoiler: there are many ways of opening a window.
Müller, Christian, and Garrett Weinberg. “Multimodal input in the car, today and tomorrow.” IEEE MultiMedia 18, no. 1 (2011): 98-103.