Name Plate from a RCA Spectra 70/45 machine  c1965

5x RCA Spectra 70 Chips mounted on tie pins  c1965

The RCA Spectra 70/45 was one of the first computer systems to use monolithic integrated circuits in its construction .

The Spectra 70 series were the first computers commercially available that made use of integrated circuits designed in RCA labs .

The RCA Spectra 70/45 was sold in the UK by English Electric as the System 4-50 .

The Spectra 70 series was also manufactured by Siemens, as the Siemens 4004 .

Original RCA Photo of a RCA Spectra 70 machine c1964

Name Plate from an ICL System 4-50 machine  c1970