9 TOUCH SCREEN PRESENTATION SYSTEMS WITH GESTURE RECOGNITION CAPABILITIES, COMPOSED OF COMPUTERS, AUDIOVISUAL COMPONENTS, NAMELY, VIDEO BEAMS PROJECTORS, CAMERAS AND LOUDSPEAKERS, COMPUTER PRESENTATION SCREENS, AND/OR PROJECTION SCREENS, AUDIO AND GRAPHIC CARDS FOR PRESENTATION CONTROL AND GESTURE RECOGNITION, AND RELATED COMPUTER PERIPHERALS, COMPUTER HARDWARE AND COMPUTER SOFTWARE FOR OPERATING PRESENTATION SYSTEMS