Telephone

A telephone is a device that converts analog audio into electrical signals that can be transferred to other telephone users. The telephone enables people to communicate with others all over the world and is widely credited as being invented by Alexander Graham Bell in 1876.

There are four categories of phones: the classic corded telephone (which could utilize a rotary dial or have buttons), the cordless or wireless phone, the standard cell phone, and the smartphone. Today, the landlineversion of the telephone is widely being replaced by cell phones and smartphones as they are much more convenient and service prices have come down drastically.