2. The method as in claim 1 wherein the command input which causes the turning on of large vocabulary speech recognition is a non-acoustic input.
2. The method as in claim 1 wherein the command input which causes the turning on of large vocabulary speech recognition is a non-acoustic input. 14. The method as in claim 2 wherein: said method provides a user interface having a plurality of speech mode selection buttons, which are either hardware or software buttons, each for selecting a respective one from a plurality of different speech recognition modes, which are distinguished from one another by characteristics other than recognition duration and which are all available for selection by the user at one time; and the non-acoustic input which causes the turning on of the large vocabulary speech recognition is the pressing of one of said buttons; and the method responds to the pressing of a given speech mode button by turning on the large vocabulary speech recognition in the given button's associated mode and then subsequently automatically turning off said recognition in said mode.