IBM 702

The IBM 702 was a 1953 to 1954 produced the mainframe 700/7000 series of IBM.

The UNIVAC I of the competing company, Remington Rand sat in the first half of the 1950s the scale in the mainframe world. IBM was in a catching-up process in commercial machines and equipment of the IBM 702, the computer had designed a smaller track record as the IBM 701 and was for commercial applications.

The system used an electrostatic memory consisting of 14, 28, 42, 56 or 70 Williams tubes with a capacity of 1,000 bits. Thus, the memory from 2000 to 10000 characters consisted of a length of 7 bits each. 14 Williams tubes with a capacity of 512 bits realized 2 batteries with 512 characters. The computer used for the first time at IBM magnetic tapes.

System Configuration

A typical installation for IBM 702 was:

  • IBM 702 main processor ( engl. Central Processing Unit)
  • IBM 732 drum storage (English Magnetic Drum Storage Unit )
  • IBM 727 magnetic tape unit ( engl. Magnetic Tape Unit ), 1953, approximately 740 m roll band, 4MB memory
  • 712 IBM punch card reader ( engl. Card Reader)
  • 722 IBM punch card punch (English Punch Card )
  • IBM 717 Printer ( Printer engl. )
IBM 700/7000 series Computer memory Tape drive Keypunch
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