I should also point out that telephones also once had dials. This is because telephones (before the touch tone system which we now have today) used to be accomplished by rotating a circular object (then, known as a "dial") about its axis. These early pre-touch tone telephones were referred to as "rotary dial telephones", because the dial (the device which was part of the telephone) was used to complete the numerical input of a telephone number (which is needed when placing a phone call).
Many commercials today indicate to "dial" a phone number. This may be confusing to some as it would be physically impossible to "dial" a telephone number with a modern day touch tone key pad. I often wonder if the advertizers realize that they are suggesting the use of an obsolete technology when they tell the viewer (or listener if the broadcast is being heard on the radio) to "dial" their telephone number, or perhaps this is just a slang term that has become a mainstream part of our culture that everyone recognizes when one is asked to place a phone call
