IBM 1620
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The IBM 1620 was a model of scientific minicomputer produced by IBM. It was announced on October 21, 1959, and was then marketed as an inexpensive scientific computer. After a total production of abou
IBM 1620 Model I, Level H
IBM 1620 data processing machine with IBM 1627 plotter, on display at the 1962 Seattle World's Fair
IBM 1620 SPS card
IBM 1627 drum plotter
IBM 650
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The IBM 650 Magnetic Drum Data-Processing Machine is an early digital computer produced by IBM in the mid-1950s. It was the first mass-produced computer in the world. Almost 2,000 systems were produce
Part of the first IBM 650 computer in Norway (1959), known as "EMMA". 650 Console Unit (right, an exterior side panel is open), 533 Card Read Punch unit (middle, input-output). 655 Power Unit is missing. Punched card sorter (left, not part of the 650). Now at Norwegian Museum of Science and Technology in Oslo.
IBM 650 at Texas A&M University. The IBM 533 Card Read Punch unit is on the right.
IBM 650 console panel, showing bi-quinary indicators. Note wear marks around frequently used switches, lower right. Collection of the Museo Nacional de Ciencia y Tecnología. A Coruña (Galicia, Spain).
Close-up of bi-quinary indicators