Sears employees and renters began moving into the Sears Tower in fall 1973. They used the tower’s 104 elevators to get to their offices. The enormous flow of workers in and out of the tower brought new life to that part of downtown. Soon new shops and restaurants opened nearby. In 1974 the Sears Tower Skydeck opened to the public. The Skydeck is an observation deck on the tower’s 103rd floor. On the Skydeck, visitors stand 1,353 feet (412 m) above the sidewalk.
In the 2000s, more than one hundred companies rent offices in the Sears Tower. On average, more than ten thousand people work, do business, eat, and shop in the tower every day. In 2009 the tower’s owners announced plans to make this busy center more energy-