Have you ever heard of Morse Code used in the 1830s for electrical telegraphy by Samuel Morse? There are times that I don’t have my computer. I use long and short blinks to make up letters just like a soldier used it to let his country know he was being tortured. Putting the Morse Code on both sides of business cards allows both me and the other person to see the letters at the same time. I use Morse Code for when I’m getting ready to go to bed, in the shower, horseback riding, and even skiing! Check this article out!