Photo 1: Computer Science building where the ILLIAC housed.

The ILLAC II was built at the University of Illinois Urban Champaign in 1962.  It was designed to be a hundred times faster than its predecessor ILLAC I.   It was the one of the first super computers to implore the use of transistors instead of vacuum tubes. This enabled the designers to construct a compact super computer that generated less heat. Other notable characteristics are that it had a larger memory and processor storage. 

Photo 2: ILLAC II

Fabricated in 1966 at the University of Illinois the ILLIAC III’s chief job was to analysis bubble chamber experiments to detect nuclear partials. It was latter used for biological image processing.

Photo 3: ILLAC III 

The ILLIAC IV was designed to be bigger and faster than its forerunner. The main idea was design a computer that linked a single control unit with several sub units, each utilizing its own arithmetic a data storage capabilities. This would enable the machine to perform multiple complex calculations simultaneously at 50 times the speed of the ILLIAC III.

Photo 4: Diagram of ILLIAC IV floor layout.

Operational in 1988, it utilized advanced interconnected networks and control unites that optimized parallelism.

Work cited:
Kingery, Alan, Rudy D. Berg, and E. H. Schillinger. Men and Ideas in Engineering; Twelve Histories from Illinois. Urbana: Published for the College of Engineering, U of Illinois, by the U of Illinois, 1967. Print.