Computer
- Date Submitted: 01/28/2010 06:29 AM
- Flesch-Kincaid Score: 51.4
- Words: 2763
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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. For example, send a flood of coffee toward a
personal computer. The hard disk of the computer could be
endangered by the flood of coffee. Besides, human caretaker of
computer system can cause as much as harm as any physical hazard.
For example, a cashier in a bank can transfer some money from one
of his customer's account to his own account. Nonetheless, the
most dangerous thief are not those who work with computer every
day, but youthful amateurs who experiment at night --- the
hackers.
The term "hacker "may have originated at M.I.T. as students'
jargon for classmates who labored nights in the computer lab. In
the beginning, hackers are not so dangerous at all. They just
stole computer time from the university. However, in the early
1980s, hackers became a group of criminals who...
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