#21: The Calculator Watch
Well before Fitbits and smart watches were so prevalent in society, people would wear simple watches that only told the time. Gasp… We know! So, when Casio came out with their calculator watch, you can only imagine the excitement it stirred up. A wristwatch that could also do math, no way.
provided by diynhacks.com
Though these watches could only really do basic mathematical equations, this was a huge advancement in technology for them at the time. Today these watches don’t hold a candle to the ones we have now, you know, the personal assistance on our wrists, but they are still pretty fun.