computers：one of the greatest advances in modern technology

Do you think what is the greatest advances in modern technology?let me told you,it's computer.because it,we can Contact with each other by mass mailer
Nowadays social science and technology is developed, the computer use already extremely was common, almost each each household all had a computer.
one of the greatest advances in modern technology is invention computers.they help people in different ways.they are widely used in industy,research institues.offices and home .computer are capable of doing extremely complicated work in all branches of sciences .they can solve the most complex mathematical problems.or put thousands of unrelated facts in orer.they can be put to different uses.becaus they work accurately and at high speed.they save research worker years of hard work.
Most serious has affected between the human and human's communication, because the computer too was not really convenient, so long as the people then could transmit each other using the Internet the news, even connect the telephone the time also to reduce; Long this gets down, this society can become indifferent, between the human and human's mutual lack of understanding also can be more and more big.
Oh! The computer brings the fault is fearful!