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, Roebuck & Company Mail Order Building (Los Angeles, California) Deco tower and "Sears" sign became a "beacon for Eastsiders returning home on area freeways," and has been described by the Los Angeles Conservancy as "one of the dominant visual icons of the Eastside" of Los Angeles. The distribution center was closed in January 1992, eliminating jobs for 585 full-time workers and 775 part-timers. The facility's general manager said at the time that the Boyle Heights center was the most expensive that Sears operated, partly because the facilities were "outdated." In 2004, developer MJW Investments announced it had acquired the building and would make it the centerpiece of a proposed