IBM 702
The IBM 702 was a mainframe computer of the 700/7000 series by IBM produced from 1953 to 1954 .
The UNIVAC I from rival Remington Rand set the standard in the mainframe world in the first half of the 1950s. IBM was catching up with commercial computers and offered the IBM 702. The computer had a lower performance record than the IBM 701 and was designed for commercial applications.
The system used an electrostatic memory consisting of 14, 28, 42, 56 or 70 Williams tubes with a capacity of 1000 bits each . Thus the memory consisted of 2000 to 10000 characters with a length of 7 bits each. 14 Williams tubes with a capacity of 512 bits each realized 2 accumulators with 512 characters. The computer first used magnetic tapes at IBM .
System configuration
A typical installation for an IBM 702 was:
- IBM 702 main processor (Central Processing Unit)
- IBM 732 drum store (Engl. Magnetic Drum Storage Unit)
- IBM 727 magnetic tape unit (engl. Magnetic Tape Unit) in 1953, about 740 m roll tape, 4 MB storage
- IBM 712 punch card reader
- IBM 722 keypunch (engl. Card punch)
- IBM 717 printer (engl. Printer)
Web links
Individual evidence
- ↑ Emerson W. Pugh, Lyle R. Johnson, John H. Palmer, IBM's 360 and early 370 systems , MIT Press, 1991, ISBN 0262161230
- ↑ IBM System Storage Compendium, Kurt Gerecke u. Klemens Poschke