1. Email Addresses

Email addresses are used by electronic mail systems to determine where to deliver messages. They consist of two parts separated by an at sign (@, sometimes called commercial at): name@domain

The domain part consists of a number of items separated by period marks. It identifies an institution or other organisation and sometimes a specific part of the organisation or even an individual server computer.

The name identifies an individual email user. A typical form is the first and last name separated by a period, but other forms using an underscore, initials, a job title, or a one-word server username are all valid. A username may be generated in a numerical series or based on a first or last name, or a job or project title.



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