A Touch Tone Phone is a type of telephone that uses a keypad with buttons to dial numbers. Each button emits a specific tone when pressed, allowing the phone system to recognize the number being dialed. This technology replaced the older rotary dial phones, making it faster and easier to make calls. Introduced in the 1960s, Touch Tone Phones became popular for their convenience and efficiency. They are commonly used in homes and businesses, and they paved the way for modern communication devices, including mobile phones and smartphones. Today, most phones utilize similar technology for dialing and other functions.