Elevator systems are mechanical devices used to transport people and goods vertically between different floors of a building. They consist of a car that moves up and down a shaft, powered by a motor. Elevators can be found in various settings, including residential buildings, commercial spaces, and hospitals, making them essential for accessibility. There are different types of elevator systems, such as hydraulic, traction, and pneumatic elevators. Hydraulic elevators use fluid pressure to lift the car, while traction elevators rely on cables and pulleys. Pneumatic elevators use air pressure to move the car. Each type has its own advantages and is chosen based on the building's needs.