The term 'BIG ELEVATOR MAKER' refers to the company Otis, which is a four-letter word. Otis is a global leader in the elevator and escalator industry, having been founded in 1853. It is the world's largest manufacturer of elevators and escalators, with products installed in more than 200 countries and territories around the world. Otis has a long history of innovation and safety, and its products are designed to meet the highest standards of quality and reliability.