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The IBM 550 numerical interpreter was the first commercial machine made by IBM that read numerical data punched on cards and printed it across the top of each card. The 550 was introduced in 1930.
Information to be printed could be placed in any sequence via IBM Archives
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The IBM 550 numerical interpreter was the first commercial machine made by IBM that read numerical data punched on cards and printed it across the top of each card. The 550 was introduced in 1930.
Information to be printed could be placed in any sequence via plugboard
A plugboard or control panel (the term used depends on the application area) is an array of jacks or sockets (often called hubs) into which patch cords can be inserted to complete an electrical circuit. Control panels are sometimes used to di ...
control panel selections. The machine operated at the rate of 75 cards a minute. The feed hopper had a capacity of 800 cards, and the stacker had a capacity of 1,000 cards.
Alphabetic and numeric characters could be printed by the Type 552 alphabetic interpreter, announced in 1937. It could process 60 cards per minute. The Type 552 was withdrawn in December 1957./ref>
References
See also
*Unit record equipment
Starting at the end of the nineteenth century, well before the advent of electronic computers, data processing was performed using electromechanical machines collectively referred to as unit record equipment, electric accounting machines (EAM) o ...
* IBM 557
The IBM 557 Alphabetic Interpreter allowed holes in punched cards to be interpreted and the punched card characters printed on any row or column, selected by a control panel. Introduced in 1954, the machine was a synchronous system where brushes ...
Alphabetic Interpreter
550
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Year 550 ( DL) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 550 for this year has been used since the early medieval period, when the Anno Domini calendar era ...
550
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Year 550 ( DL) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 550 for this year has been used since the early medieval period, when the Anno Domini calendar era ...
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