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[3] Hollerith used punched cards with round holes, 12 rows, and 24 columns. The cards measured 3 + 1 ⁄ 4 by 6 + 5 ⁄ 8 inches (83 by 168 mm). [4] His tabulator used electromechanical solenoids to increment mechanical counters. A set of spring-loaded wires were suspended over the card reader. The card sat over pools of mercury, pools ...
1949: The IBM 024 Card Punch, 026 Printing Card Punch, 082 Sorter, 403 Accounting machine, 407 Accounting machine, and Card Programmed Calculator (CPC) introduced. [52] 1952: Bull Gamma 3 introduced. [53] [54] An electronic calculator with delay-line memory, programmed by a connection panel, that was connected to a tabulator or card reader ...
A 12-row/80-column IBM punched card from the mid-twentieth century. A punched card (also punch card [1] or punched-card [2]) is a piece of card stock that stores digital data using punched holes. Punched cards were once common in data processing and the control of automated machines.
Herman Hollerith (February 29, 1860 – November 17, 1929) was a German-American statistician, inventor, and businessman who developed an electromechanical tabulating machine for punched cards to assist in summarizing information and, later, in accounting.
Its purpose was to produce simple ad hoc reports similar to those created with a plugboard on a punched card tabulator, bypassing the necessity to write an assembly language program in PLAN. It required only a few cards to specify the input and output formats, headings, sequencing and totalling.
The first commercial sale was made in 1964 to the Morgan Crucible Company, comprising a 16K word 1902 with an 80-column 980-card/minute reader, a card punch, a 600 line/min printer and 4 x 20kchar/s tape drives [nb 1]. It was soon upgraded to a 32K word memory and a floating point unit to allow for some scientific work.
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