Audio circuit boards; Light switches; Lighting control apparatus; Electric audio playback units with lights and speakers; Bullhorns; Electronic timers; Time recording apparatus; Optical lamps; Electric or electronic sensors for time recording, speakers,etc.; Loudspeaker cabinets; Electronic apparatus, namely, electronic display boards, plasma display boards, electronic display screens; Lighting controls; Infrared sensors; Downloadable software using artificial intelligence (AI) for simulating...