A redditor posted this pic of a dusty old Comptometer, and described it as a typewriter. Commenters instantly piled on, some saying it was a calculator, others correctly identifying it as a Comptometer.
Then somebody observed:
Cunningham’s Law: To find an answer, don’t ask for a solution. Instead, post the wrong one. People who wouldn’t cross the street to help you will parachute in to point out your mistake. Well done.
Truth, and beautifully stated!
Polistra's Mill 