Pocket calculator - a nerd's proudest possession - the Awesome World of Things
Math nerds couldn't slip the first all-transistor calculator into their shirt pockets: The three-unit IBM 608 weighed 2400 pounds. Anyway, at $83,210, it was too pricey. By 1976, four-function pocket calculators weighed a few ounces and cost a few dollars - Popular Mechanics.
Find out more about the pocket calculator over at LinkedIn here.