48. The computer system of claim 47 wherein the computer system is selected from the group consisting of a desktop computer, a tablet computer, and a notebook computer.
47. The computer system of claim 41 , wherein the indication of the accuracy of the practice gesture currently being performed includes one or more items selected from the group consisting of: an animated hand, one or more motion trails, an iconographic representation, a textual description of the gesture currently being performed, a textual description of a command corresponding to the gesture currently being performed, a positive feedback indicator, and a negative feedback indicator.