Answered by The Community. Making the world better, one answer at a time. 1st way of government policy to affect demand/supply is through price ceilings and price floors. By price ceiling it means that goods have to be sold below this price and price floors means that goods have to be sold above this price set.As supply decreases, price increases, because there is less of the commodity available on the market, and consumers must compete more aggressively with each other to purchase the same commodity. Price can also increase when demand increases, also creating increased competition for the commodity.
For example, mechanical surveillance would be used over human in a case where someone is stealing from a construction site. Private investigators can put up cameras and go back and harvest the recordings. Human surveillance is when the investigative team is the main source of information.
More types of electronic devices include answering machines, beepers or pagers, defibrillators, video displays, dongles, doublers, multiplexes, trackballs, artificial pacemakers and monitors. An answering machine is a device that answers the telephone and records messages. A generator is an electronic device used for producing a signal voltage. A digital scanner, or image scanner, is an electronic device that generates a digital representation of an image for data input to a computer. A trackball is an electronic device consisting of a routable ball in housing.