Secret history of the screwdriver
See the original posting on Boing Boing
From old-school bOING bOING editor Gareth Branwyn’s must-read e-newsletter “Gareth’s Tips, Tools, and Shop Tales“:
I love The History Guy on YouTube. In this episode, he examines the history of the screwdriver and how world events shaped the development of the Phillips head and Robertson head drivers and screws. Even if you know something about the history of this ancient technology, you will likely learn some cool things from this video.