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The Sinclair Scientific

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Sinclair scientific

Introduced in 1974.

Simple low cost 12 function RPN calculator. It displays only in scientific notation, with a five digit mantissa and a two digit exponent.

This nice calculator was also available as a build-it-yourself kit.

 

   

Manuals

A pdf version of the operating instructions can be downloaded here.
This calculator was also available as a build-it-yourself kit. The assembly instructions can de downloaded here.

My sinclair scientific inside page shows the interior of this calculator.

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Sinclair Scientific related links:

Sinclair related links:

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