Sears conglomerate during the mid-20th century, adding Dean Witter and Coldwell Banker real estate in 1981, starting Prodigy as a joint venture with IBM in 1984, and introducing the Discover credit card in 1985. In 1974, Sears completed the 110-story Sears Tower in Chicago, which became the world's tallest building, a title it took from the former World Trade Center towers in New York. Sears moved to the new Prairie Stone Business Park in Hoffman Estates, Illinois, between 1993 and 1995. The Sears Centre is a 10,001-seat multi-purpose arena located in Hoffman Estates adjacent to the Prairie Stone campus. Even though
Sears Canada of Distinctive Appliances and the sale was due to be completed in December 2017. The headquarters were in Downtown Toronto, inside an eight-story complex which was formerly the home to Sears' flagship location within the Toronto Eaton Centre until 2014. The headquarters moved there from 222 Jarvis Street after that building was sold in 2007. The lower four floors of the Eaton Centre location remained in use for retail, including a three-floor Nordstrom store from fall 2016 onwards, while the upper four floors continued as Sears Canada headquarters. This headquarters remained active until the retailer completed liquidation on January 14,