{"id":5625,"date":"2022-01-11T12:08:12","date_gmt":"2022-01-11T12:08:12","guid":{"rendered":"https:\/\/loadzx.com\/sinclairworld\/?page_id=5625"},"modified":"2025-09-24T16:21:35","modified_gmt":"2025-09-24T16:21:35","slug":"executive","status":"publish","type":"page","link":"https:\/\/loadzx.com\/sinclairworld\/executive\/","title":{"rendered":"Executive (1972-73)"},"content":{"rendered":"\t\t
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1972<\/div>
Sinclair Radionics<\/div><\/div>
<\/i><\/div>
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Sinclair Executive - Type 1<\/div>
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Executive was the world\u2019s first <\/span>slimline<\/span> pocket-sized electronic calculator. Just 9<\/span><\/span>\u202f<\/span><\/span>mm thick, it fit neatly in a shirt pocket\u2014one third the size of its rivals<\/span> and ha<\/span>lf the cost. This early model featured a \u201cK\u201d switch for constants and a side-mounted control for fixing or floating decimal places. <\/span><\/span>To achieve its slim form, Sinclair developed a circuit that supplied power to the <\/span>calculator\u2019s <\/span>chip in short pulses rather than <\/span>continuously\u2014cutting<\/span> energy use and allowing the calculator to run on tiny button cells <\/span>at a time when most calculators <\/span>required<\/span> larger batteries or mains power.<\/span><\/span>\u00a0<\/span><\/p><\/div><\/div><\/div>

1972<\/div>
Sinclair Radionics<\/div><\/div>
<\/i><\/div>
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Sinclair Executive - Type 2<\/div>
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A later version of the innovative Executive, this model introduced a brightness switch \u201cL\u201d\/\u201cH\u201d<\/span><\/span> and replaced the \u201cK\u201d constant switch with a dedicated button\u2014small refinements that made it easier to use. Beneath its casing, the Executive\u2019s breakthrough lay in its pulsed-power circuitry, which supplied energy to the chip only when needed. This radical approach reduced energy use and allowed for a slimmer design than any rival. <\/span><\/span>The Executive series won a Design Council Award in 1973, and an example is held in the Museum of Modern Art\u2019s <\/span>collection <\/span>in<\/span> in New York for its technical innovation and contribution to modern design.<\/span><\/span>\u00a0<\/span><\/p><\/div><\/div><\/div>

1973<\/div>
Sinclair Radionics<\/div><\/div>
<\/i><\/div>
<\/div>
Sinclair Executive Memory - Style 1<\/div>
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This slim calculator added a memory function to the original Executive\u2014allowing users to store subtotals during sequences of calculations. Like its predecessor, it used pulsed-power circuitry to run on four button cells, keeping the case just 9<\/span><\/span>\u202f<\/span><\/span>mm thick. Introduced at a lower price than the original Executive, it featured a red LED display and a Texas Instruments chip that handled its calculations and display. This model combined a white plastic case with a brushed black metal faceplate, in keeping with the range\u2019s award-winning design aesthetic.<\/span><\/span>\u00a0<\/span><\/p><\/div><\/div><\/div>

1973<\/div>
Sinclair Radionics<\/div><\/div>
<\/i><\/div>
<\/div>
Sinclair Executive Memory - Style 2<\/div>
\"\"<\/div>

This follow-up to the original Executive added a memory function while preserving the ultra-slim 9<\/span><\/span>\u202f<\/span><\/span>mm profile. It used the same reduced power intake to run on four button cells\u2014remarkably compact for its time\u2014powering a red LED display and Texas Instruments chip. This version featured a black metal <\/span>case<\/span> with a gold-toned faceplate and black <\/span>buttons<\/span>, giving it a more luxurious, high-contrast look. These refinements reflected the Executive range\u2019s focus on usability, <\/span>upgraded features<\/span>, and modern design.<\/span><\/span>\u00a0<\/span><\/p><\/div><\/div><\/div><\/div>\n

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