People And Technology
	v People have no innate understanding of any technology more complicated than a stick o  We must be trained to ride a bicycle, drive a car, ski, ... o Appliances and tools come with an owner’s manual v But people accumulate experience, learn and reason, so we can “figure out” how to use some gear without reading the owner’s manual, e.g. portable CD player v Product designers try to make technology so simple that members of a technological society can guess its operation using only experience, knowledge and reasoning