The message travels from one point to another via a channel of communication. In the diagram, the channel sits between the sender and receiver, Points A and B. Many channels, or types, of communication exist, from the spoken word to radio, television, an Internet site or something written, like a book, letter or magazine. Every channel of communication has its advantages and disadvantages. For example, one disadvantage of the written word, on a computer screen or in a book, is that the receiver cannot evaluate the tone of the message. For this reason, effective communicators word written communications clearly so they don't rely on a specific tone of voice to convey the message accurately. The advantages of television as a channel for communication include its expansive reach to a wide audience and the sender's ability to further manipulate the message using editing and special effects.