Template:Are You Sure/May 21

• ... that lawyer, translator, and inventor Per Georg Scheutz, along with his son Edward, built several experimental calculation engines inspired by Charles Babbage's difference engine; and that the Scheutzian calculation engine was demonstrated at the World's Fair in Paris, 1855, and later sold commercially, being the the first printing calculator sold?

• ... that musician-activist Woody Guthrie makes a cameo appearance in the American period comedy-drama biographical film Woody Nights?