Electronic mail is a way to send messages to other people, using your computer. To use electronic mail, you write a message on your computer either before, or while you are attached to a network or an on-line service. You also put an address on the message, then instruct your network to send the message to that address.
Electronic mail permits users to send messages around the world almost instantly.
Using electronic mailing lists, you can send a message to thousands of people quickly and easily. Even better is the fact that the cost of electronic mail ranges from a few cents per message, to nothing at all. You can get an electronic mail address by getting an account with an on-line service, or through your company or school network.