Calculators 1968-1983 is a pop-up exhibition by Greg Maletic, of his own collection.
Here’s a very short video from this article (which has a nice slideshow too):
You’ll see large, small, slim, pen-sized, abacus-equipped and spherical examples.
I’ve had a fascination with these machines since the 70s, when the calculators my dad would bring home from the office were the only computer-like things I could get my tiny hands on.
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I now have more than 250 calculators from the era 1968-1983, each chosen for its beauty and design more than any particular technical attribute.
There’s a gallery on Flickr of the calculators (rather than of the exhibition) which includes the SR-22, a hex/oct/dec machine from TI.
via Jamel Tayeb’s blog post which has more images and notes: