Elliott 503

The Elliott 503 was a transistorized computer introduced by Elliott Brothers in 1963. It was software-compatible with the earlier Elliott 803[1] but was about 70 times faster and a more powerful machine. About 32 units were sold.[2] The basic configuration had 8192 words of 39 bits each for main memory,[3] and operated at a system clock speed of 6.7 megahertz. It weighed more than 4,050 pounds (2.0 short tons; 1.8 t).[4]

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  3. ^ "A SURVEY OF NEW WEST-EUROPEAN DIGITAL COMPUTERS (Part 3 - Conclusion): ELLIOTT 503" (PDF). Computers and Automation. XII (11): 36. November 1963. Retrieved 5 September 2020.
  4. ^ Weight of Logic (1000), Main Store (850), Power (1350) Cabinets and Control Console (850):