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The Digital Computer Laboratory (DCL) was the original home of the Computer Science department at the University of Illinois. The two-story building was constructed in 1958 and was expanded in 1967. In 1989, another addition added a third floor and enclosed the old building on three sides. The Computer Science department offices moved to the Siebel Center upon its completion in 2004. Inside DCL you can read about the infamous Illiac IV computer that was at the University.