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Electronic mail is one of the most popular online services. People
living thousands of miles apart can exchange messages and documents
very quickly.
International Resource Development, Inc., an American research
organization, claimed (1992) that we can send electronic mail to
more than 10 million personal mailboxes. We believe the figure to
be much higher. The Matrix News (Texas, U.S.A.) claims the number
is over 18 million (March 1993).
The Boardwatch Magazine (U.S.A.) believes that new callers are
coming online for their first time at a rate of close to 10,000 per
day (January 1993).
Electronic Mail & Micro Systems (New Canaan, Conn., U.S.A.)
estimated an average of 27.8 million messages sent per month in