Numerical calculating devices photographed with a multipurpose smart device - #8/365, a photo by PJMixer on Flickr.
Via Flickr:
Guess which one is over 25 years old (and still works like a charm - if you understand reverse Polish notation) ?
Tuesday, January 8, 2013
Numerical calculating devices photographed with a multipurpose smart device - #8/365
Numerical calculating devices photographed with a multipurpose smart device - #8/365, a photo by PJMixer on Flickr.
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