CALCULATORS & ADDING MACHINES!
Have you ever seen one of those old fashioned adding machines where you push down the # keys and then pull the handle? Here's a picture if you haven't It even prints each number you feed into it then when you push down the "total" button and pull the handle it prints out the total. How neat is that? It never needs to be plugged in and it never needs a battery. As far as I can tell all it needs is a roll of regular calculator paper and an old fashioned typewriter like ribbon that even reverses... Sign in to see full entry.