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File:Vintage Texas Instruments Datamath Pocket LED Calculator, Model TI-2500, Version 3, Made in the USA, Circa 1973 (41029101670).jpg - Wikimedia Commons
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Vintage TI DataMath / Sinclair Scientific Calculator Emulator : 5 Steps (with Pictures) - Instructables
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Texas Instruments Datamath 2500 calculator nameplate by Brad Grier | Download free STL model | Printables.com
![This is the TI-2500 Datamath, one of the first electronic calculators. It looks like it inspired a certain Engineer's PDA... : r/tf2 This is the TI-2500 Datamath, one of the first electronic calculators. It looks like it inspired a certain Engineer's PDA... : r/tf2](https://external-preview.redd.it/1fGr75HiFq4iqs937vSU0wlMUNZWJdMWjKgF7iprrqo.jpg?auto=webp&s=cb435df25de1ed1ccb4aa19dcdd449ca00628989)
This is the TI-2500 Datamath, one of the first electronic calculators. It looks like it inspired a certain Engineer's PDA... : r/tf2
![Chris Chung's TI Datamath and Sinclair Scientific Calculator Emulator Gets a 2020 Makeover - Hackster.io Chris Chung's TI Datamath and Sinclair Scientific Calculator Emulator Gets a 2020 Makeover - Hackster.io](https://hackster.imgix.net/uploads/attachments/1078774/_1as6biwdbi_blob_Q6kIC5SO73.jpeg?auto=compress%2Cformat)
Chris Chung's TI Datamath and Sinclair Scientific Calculator Emulator Gets a 2020 Makeover - Hackster.io
![File:Vintage Texas Instruments Datamath Pocket LED Calculator, Model TI-2500, Version 3, Made in the USA, Circa 1973 (9288612296).jpg - Wikimedia Commons File:Vintage Texas Instruments Datamath Pocket LED Calculator, Model TI-2500, Version 3, Made in the USA, Circa 1973 (9288612296).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/6/64/Vintage_Texas_Instruments_Datamath_Pocket_LED_Calculator%2C_Model_TI-2500%2C_Version_3%2C_Made_in_the_USA%2C_Circa_1973_%289288612296%29.jpg)