Methods and apparatus for receiving a telemetry signal with a receiver that is moveably disposed within a drillstring. The converted three string signals are time-division multiplexed and multi-level modulated to realize QAM modulation in which the n-ary number may be set to approximately 2 or 2. The process is particularly adaptable for teaching persons how to use and maintain various types of industrial machines, teaching students various scientific phenomena and processes, teaching office workers how to use computers and various other office machines, and teaching homeowners how to use various consumer products. In a first mode the dispenser is operable to dispense aerosolized medication.