B&W image of the Hitichi EX310 mainframe computer. In the foreground is a desk with display and keyboard. In the background are the computer frames.
Verso attached paper: " Hitachi Data systems has added two new high-end models to its EX Series mainframe computers. Pictured is the EX310, a three-way (tridatic) complex which is used by business and other enterprises for a wide variety of general purpose, commercial and engineering applications. With it counterpart, the EX 420, the model 310 features evolutionary advances in base technology resulting in higher levels of performance and capacity. (310-s)"