Where did the word touch typing come from?

Why do people call it touch typing?

Hi! Touch typing is an important skill, but for many people the term “touch typing” causes some confusion. It’s true that in order to type – whether on a typewriter or on a computer keyboard – your fingertips must “touch” certain keys. Doing so is how you produce the desired words, or proper combination of words, numbers, and/or symbols. A lot of people believe that this simple act of “touching” specific keys is what touch typing is all about.