Electronic mail sent using the internet. You can only send E-mail from a computer with a modem or one which is connected to a network with an internet facility. There are different types of E-mail software programmes, Pegasus mail being a popular one because it is available as Freeware from the WWW to individual users. Other common programmes include Simeon and Eudora, and E-mail is integral to certain software packages such as Outlook. E-mail is useful not only for passing memos internally, or for contacting people nationally and internationally cheaply and quickly (within seconds), but also as a way of passing documents for others to read as an attachment.