When you sign up with an Internet Service Provider (ISP) and pay a monthly fee, you establish an "account" and receive an account name (or a username) as well as a password. This information allows you to access the Internet and your e-mail account when you dial the telephone number provided by the ISP. Account is a common term, and you can easily have more than one online account. For e-mail, you may have a local account and a Webmail account (such as Hotmail). For Net access, you may have a dial-up account you use at home and another account you use at school or work.
see also: access number