{"id":5681,"date":"2022-01-11T16:39:16","date_gmt":"2022-01-11T16:39:16","guid":{"rendered":"https:\/\/loadzx.com\/sinclairworld\/?page_id=5681"},"modified":"2025-09-24T16:23:30","modified_gmt":"2025-09-24T16:23:30","slug":"scientific","status":"publish","type":"page","link":"https:\/\/loadzx.com\/sinclairworld\/scientific\/","title":{"rendered":"Scientific (1974-75)"},"content":{"rendered":"\t\t
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1974<\/div>
Sinclair Radionics<\/div><\/div>
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Sinclair Scientific<\/div>
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This white, pocket-sized calculator offered scientific functions at a fraction of the cost of its competitors. Built around a chip designed for basic arithmetic, its advanced capabilities\u2014such as logarithms and trigonometry\u2014were enabled by clever programming, though often with reduced speed and accuracy. To simplify the hardware, it used Reverse Polish Notation (RPN) for entering calculations, which made operation less intuitive for users, and its ingenious code continues to fascinate\u2014being reverse engineered in 2013 by a Google programmer.<\/span><\/span>\u00a0<\/span><\/p><\/div><\/div><\/div>

1975<\/div>
Sinclair Radionics<\/div><\/div>
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Sinclair Scientific Programmable<\/div>
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This black calculator offered basic programmability at a fraction of the price of rival models. Slightly larger than the earlier Sinclair Scientific, it allowed users to store up to 24 steps\u2014enough for short custom routines\u2014but the real appeal lay in its library of over 400 pre-written programs covering topics from physics and statistics to engineering. Marketed as a \u201cminiature computer,\u201d it introduced programmable devices to a broader audience. Some of its design quirks, like multi-function keys, would later reappear in Sinclair\u2019s ZX microcomputers.<\/span><\/span>\u00a0<\/span><\/p><\/div><\/div><\/div><\/div>\n

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