CMT 04106 Basic Computer Applications NTA Level 4 Semester 1 Student Manual
Session 20: Internet, Web and Computer Communications 292
You get a private e-mail address which you give to others, and then they can send you e-
mail.
To read your e-mail and to send e-mails yourself, you visit the Website again and open
your personal ‘mailbox’.
A typical e-mail message has three basic elements: a header, letter/message, and a
signature.
A header appears first and typically includes the following information.
o Addresses of the persons sending, receiving, and, optionally, anyone else who is to
receive copies.
E-mail addresses have two basic parts, i.e.
[email protected] (dcoats is a user
domain, usc.edu is domain name, edu is the domain code).
The first part is the user's name and the second part is the domain name, which
includes the domain code. In our example e-mail, dcoats is user name.
The server providing e-mail service for the user is usc.edu.
The domain code indicates that the provider is an educational institution.
o The subject is one-line description, used to present the topic of the message. Subject
lines typically are displayed when a person checks his or her mailbox.
o Attachments: Many e-mail programs allow you to attach files such as documents and
worksheets. If a message has an attachment, the file name appears on the attachment
line.
The letter or message comes next. It is typically short and to the point.
Finally, the signature line provides additional information about the sender. Typically,
this information includes the sender's name, address, and telephone number.
Instant Message (IM)
Instant messaging (IM) is an extension of e-mail that allows two or more people to
contact each other via direct, live communication.
To use instant messaging, you specify a list of friends (also known as buddies or contacts)
and register with an instant messaging server.
Whenever you connect to the Internet, special software informs your messaging server
that you are online.
In response, the server will notify you if any of your contacts are online. At the same
time, it notifies your contacts that you are online. You can then send messages directly
back and forth to one another.
Many new instant messaging programs also include videoconferencing features, file
sharing, and remote assistance.
The most widely used instant messaging services are AOLs Instant Messenger,
Microsoft's MSN Messenger, and Yahoo Messenger.
One limitation, however, is that many instant messaging services do not support
communication with other services. For example, at the time of this writing, a user
registered with AOL cannot use AOLs Instant Messenger software to communicate with a
user registered with Yahoo Messenger.
Some software companies have started providing universal instant messenger programs
that overcome this limitation. For example, Gain, Odigo, and Trillian provide instant
messaging services that do support communication with other services.
Using E-mails for Discussion Groups
You can also use e-mail to communicate in discussion groups with people you do not
know but with whom you wish to share ideas and interests.