E-mail communication. Abstract computer artwork of a train riding a beam of light representing e- mail and the information superhighway. The train has an @" (at) symbol on its front. @ is a symbol used in all electronic mail (e-mail) addresses, and can represent all internet communications. E-mail is part of the internet, a global network of computers able to send and receive information between themselves. Messages are sent between computers in the form of binary digits (0 and 1), and can be sent as an electrical current or pulses of light."