Elliott 503

{{Short description|1960's computer}}

{{Use dmy dates|date=April 2022}}

{{more citations needed|date=June 2017}}

The Elliott 503 was a transistorized computer introduced by Elliott Brothers in 1963. It was software-compatible with the earlier Elliott 803 but was about 70 times faster and a more powerful machine. About 32 units were sold. The basic configuration had 8192 words of 39 bits each for main memory,{{cite journal|title=A SURVEY OF NEW WEST-EUROPEAN DIGITAL COMPUTERS (Part 3 - Conclusion): ELLIOTT 503|journal=Computers and Automation|date=Nov 1963|volume=XII|issue=11|page=36|url=http://www.bitsavers.org/magazines/Computers_And_Automation/196311.pdf|access-date=2020-09-05}} and operated at a system clock speed of 6.7 megahertz. It weighed more than {{convert|{{#expr: 1000+850+1350+850}}|lb|ST MT|1}}.Weight of Logic (1000), Main Store (850), Power (1350) Cabinets and Control Console (850):

• {{cite web |title=Elliott 503 FACTS - retroComputingTasmania |url=http://www.retrocomputingtasmania.com/home/projects/elliott-503/elliott-503-facts |website=www.retrocomputingtasmania.com}}
• {{cite web |title=Elliott 503 Documents |url=http://www.billp.org/ccs/503/ |website=www.billp.org|at=Volume 1 of the Computer Manual, p. 2 (13)}}