Free Essays & Term Papers

Almost every civilization in history that has kept a written history has recorded the sightings of strange objects and lights in the skies. These objects have been described as glowing wheels, colored balls of light, and disk shaped objects. Today unexplained aerial phenomena are generally referred to as unidentified flying objects (UFO’s) or flying saucers. The effects of extra terrestrial sightings can have an adverse effect on people if influenced the wrong way. No solid proof has shown that UFO’s are real, but many sightings cannot be proven otherwise. The media, stories, or one’s own experience may often influence what one believes. The government once stated that they had captured extra terrestrials.
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Computer systems contain both hard and software. Hardware is any tangible item in a computer system, like the system unit, keyboard, or printer. Software, or a computer program, is the set of instruction that direct the computer to perform a task. Software falls into one of two categories: system software and application software. System software controls the operation of the computer hardware; whereas, application software enables a user to perform tasks. Three major types of application software on the market today for personal computers are word processors, electronic spreadsheets, and database management systems (Little and Benson 10-42).

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The decade of the 1980’s saw an explosion in computer technology and computer usage that deeply changed society. Today computers are a part of everyday life, they are in their simplest form a digital watch or more complexly computers manage power grids, telephone networks, and the money of the world. Henry Grunwald, former US ambassador to Austria best describes the computer’s functions, “It enables the mind to ask questions, find answers, stockpile knowledge, and devise plans to move mountains, if not worlds.” Society has embraced the computer and accepted it for its many powers which can be used for business, education, research, and warfare.
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The Internet is a worldwide connection of thousands of computer networks. All of them speak the same language, TCP/IP, the standard protocol. The Internet allows people with access to these networks to share information and knowledge. Resources available on the Internet are chat groups, e-mail, newsgroups, file transfers, and the World Wide Web. The Internet has no centralized authority and it is uncensored. The Internet belongs to everyone and to no one.
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Only once in a lifetime will a new invention come about to touch every aspect of our lives. Such a device that changes the way we work, live, and play is a special one, indeed. A machine that has done all this and more now exists in nearly every business in the U.S. and one out of every two households (Hall, 156). This incredible invention is the computer. The electronic computer has been around for over a half-century, but its ancestors have been around for 2000 years. However, only in the last 40 years has it changed the American society. From the first wooden abacus to the latest high-speed microprocessor, the computer has changed nearly every aspect of people’s lives for the better.
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One hundred years from now, NASA’s space program will not be so far advanced that people will be able to beam around the Universe or travel through time. However, unless something goes terribly wrong with the world, it is expected to advance tremendously. New, high-tech designs for rockets will make them more environmentally safe. Rockets will also be recycled and reused. Systems retrieving parts of rockets that are today, left behind in space, will be created. Astronauts will be well on their way to exploring Mars from a hands-on perspective. Because of the overpopulated Earth, scientists may even be considering ways to alter life on Mars, so that people would be able to live there some day.
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Computers

When Charles Babbage, a professor of Mathematics at Cambridge university, invented the first calculating machine in 1812 he couldn’t imagine the situation we find ourselves in today. Nearly everything we do in the world is helped, or even controlled by computers, the complicated descedants of his simple machine. Computers are used more and more often in the world today, for the simple reason that they are far more efficent than human beings. They have much better memories and they can store much information. No man alive can do 500000 sums in one second, but a computer can. In fact, computers can do many of the things we do, but faster and better. They can predict weather, and ever play chess, write poetry or compose music.

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