You’d Never Guess How Complicated These Old Adding Machines Were… And Wait Until You Look Inside.

Today we have fancy TI-89’s and phone calculators, but have you ever wondered what calculators looked like when they were first invented? [Kevin Twomey][1] photographed a series of different calculators from earlier times. These images are quite fascinating. Check them out. [1]: http://kevintwomey.com/lowtech.html