Three generations of the Burroughs Calculator

I compare three generations of the Burroughs Calculator. 1. The box model, 1911-1914. 2. The long-legged model, 1915-1935 3. The Baby Burroughs, 1928-1960s For more information on the Burroughs Calculator and on other calculators in my collection, visit my website: https://www.jaapsch.net/mechcalc/ 0:00 Introduction 0:11 Box model 1:21 Class 5 calculator 4:47 Baby calculator 7::44 Outro