elevators are machines installed in tall buildings ,to take people to upper floors in few seconds. Answer
el·e·va·tor (ĕl'ə-vā'tər) n.
A platform or an enclosure raised and lowered in a...
Sure. You don't even have to be blindfolded. You only have to look away from the display and lighted buttons, and you have no other way of knowing when it starts and stops, except for the feeling...