Computer Protection
About two hundred years before, the word "computer" started to appear in
the dictionary. Some people even didn't know what is a computer. However, most
of the people today not just knowing what is a computer, but understand how to
use a computer.
Therefore, computer become more and more popular and important to our
society. We can use computer everywhere and they are very useful and helpful to
our life. The speed and accuracy of computer made people felt confident and
reliable. Therefore, many important information or data are saved in the
computer. Such as your diary, the financial situation of a oil company or some
secret intelligence of the military department. A lot of important information
can be found in the memory of computer. So, people may ask a question: Can we
make sure that the information in the computer is safe and nobody can steal it
from the memory of the computer?
Physical hazard is one of the causes of destroying the data in the
computer.......
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