My favorite part: Instead of typing a sequence of commands on the computer keyboard; the user merely points to tiny "icons" or commands on the screen by sliding the "mouse" (a plastic control box the size of a cigarette pack) on the desktop beside the computer. As the mouse rolls, an arrow called a cursor moves across the screen. To erase obsolete information, for example, the user moves the mouse to point first at w…
I remember trying to teach someone to use a mouse, and having to move their arm back down onto the table. See, you can't hold it in mid air, you need to slide it across the mousepad. (and in this case it was specifically required, I believe it was a mouse systems mouse with an LED and a patterned metal mousepad)