The login name is a subset of a customer's e-mail address. It is the first section of an e-mail address prior to the @ symbol. The login name is also referred to as a member name by the Comcast Online software.
The name you use to identify yourself to the system. You type it to log in to the system, and the system uses it to label files that belong to you. If your system is on a network, the network administrator usually must approve of the name to make sure it is unique. Also called user name.