Computers Can Not Only Bring Us A Great Diversity Of Benefit

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Introduction
After several decades of development, computers have changed a lot. Nowadays, it is quite hard to work without any assistance of computers in most areas, even some traditional fields, such as agriculture, tourism, education etc. A computer is defined as “a general-purpose device that can be programmed to carry out a set of arithmetic or logical operations automatically” (“Computer,” 2015). In other words, it is a device which can solve some sort of problems through calculating data or taking statistics.
The history of
Computers can not only bring us a great diversity of benefit. However, on the other hand, there are still quite a few people insist some negative points that computers made our world more complicated, or we
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ENIAC contained 17,468 vacuum tubes, 7200 crystal diodes, 1500 relays, 70,000 resistors, 10,000 capacitors and approximately 5,000,000 hand-soldered joints. It weighed more than 30 short tons (27 t), was roughly 2.4m × 0.9m × 30m (8 × 3 × 100 feet) in size, occupied 167m2 (1800 ft2) and consumed 150 kW of electricity (“Computer,” 2015). This computer can calculate more than 5000 simple addition or subtraction operations in one second. It means ENIAC was better than last generation of computer one thousand times, or manual calculation two hundred thousand times.
Background
The idea of developing an electronic computer was generated during the World War II. At that time, every country was busy with researching new strategic weapons and equipment. Therefore, producing new types of airplanes and artilleries tended to be more and more significant and necessary. For this reason, the Ordnance Department of US Army set up a "Ballistic Research Laboratory" in Aberdeen, Maryland. The US military required that the lab needed to provide six firing tables of Army artillery units daily in order to identify the development of missile technology. Although it was just six firing tables, they needed a staggering amount of work. As a matter of fact, each table must calculate hundreds of shooting ballistic, and each model of trajectory is a set of very complex nonlinear equations. These equations are no way to find the exact solution, it can only be calculated approximately by
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