Communication is the exchange of thoughts and
messages by speech, signals, or writing.
There are many systems for sending and receiving
information: the mail, telephone, television,
and the computer. Each system has its own related
business involving many different careers.
The businesses include the U.S. Post Office,
the telephone company, the internet, and the
Currently the wide spread use of the computer
has offered many new career choices: computer
makers, programmers, computer scientists, technicians,
and creators of computer programs.