Pocket Calculating Devices
By A Mystery Man Writer
Description
While the 20th century saw grand designs for general-purpose computers, it also saw principles of precision engineering applied to earlier designs, allowing them to become portable.
![Pocket Calculating Devices](https://edtechmagazine.com/k12/sites/default/files/uploads/1623_calculatingclock.jpg)
The History Of The Calculator: When was the Calculator First Invented?
![Pocket Calculating Devices](http://www.hutter1.net/calculators/mbo3010.jpg)
Homepage of Marcus Hutter
![Pocket Calculating Devices](https://www.whipplemuseum.cam.ac.uk/sites/www.whipplemuseum.cam.ac.uk/files/styles/inline/public/6158.jpg?itok=CQmieWg2)
Calculating Devices
![Pocket Calculating Devices](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Citizen_se-733_int_1ac.jpg/200px-Citizen_se-733_int_1ac.jpg)
Calculator - Wikipedia
![Pocket Calculating Devices](https://ethw.org/w/images/thumb/c/c9/Electronic_calculators_-_image007.jpg/300px-Electronic_calculators_-_image007.jpg)
Electronic Calculators: Desktop to Pocket - Engineering and
![Pocket Calculating Devices](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Solar-calculator.jpg/220px-Solar-calculator.jpg)
Calculator - Wikipedia
![Pocket Calculating Devices](http://farm2.static.flickr.com/1256/666235249_e94a8aa8fa_m.jpg)
Good Morning Yesterday: Slide Rule
![Pocket Calculating Devices](https://edtechmagazine.com/k12/sites/default/files/uploads/1967_caltech.jpg)
The History Of The Calculator: When was the Calculator First Invented?
National Museum of American History
![Pocket Calculating Devices](http://www.epocalc.net/pages/mes_calc_liste/gentry.jpg)
epocalc - Calculator pictures
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