Тексты для дополнительного чтения

Текст 1

OPERATING SYSTEMS

 

When computers were first introduced in the 1940's and 50's, every program written had to provide instructions that told the computer how to use devices such as the printer, how to store information on a disk, as well as how to perform several other tasks not necessarily related to the program. The additional program instruc­tions for working with hardware devices were very complex, and time-consuming. Programmers soon realized it would be smarter to develop one program that could control the computer's hardware, which others programs could have used when they needed it. With that, the first operating system was born.

Today, operating systems control and manage the use of hardware devices such as the printer or mouse. They also provide disk management by letting you store information in files. The operating system also lets you run programs such as the basic word processor. Lastly, the operating system provides several of its own commands that help you to use the computer.

DOS is the most commonly used PC operating system. DOS is an abbreviation for disk operating system. DOS was developed by a company named Microsoft. MS-DOS is an abbreviation for «Microsoft DOS». When IBM first released the IBM PC in 1981, IBM licensed DOS from Microsoft for use on the PC and called it PC-DOS. From the user’s perspective, PC-DOS and MS-DOS are the same, each providing the same capabilities and commands.

The version of DOS release in 1981 was 1.0. Over the past decade, DOS has undergone several changes. Each time the DOS developers release a new version, they increase the version number.

Windows NT (new technology) is an operating system developed by Microsoft. NT is an enhanced version of the popular Microsoft Windows 3.0, 3.1 programmes. NT re­quires a 386 processor or greater and 8 Mb of RAM. For the best NT performance, you have to use a 486 proces­sor with about 16 Mb or higher. Unlike the Windows, which runs on top of DOS, Windows NT is an operating system itself. However, NT is DOS compatible. The ad­vantage of using NT over Windows is that NT makes bet­ter use of the PC's memory management capabilities.

OS/2 is a PC operating system created by IBM. Like NT, OS/2 is DOS compatible and provides a graphical user interface that lets you run programs with a click of a mouse. Also like NT, OS/2 performs best when you are using a powerful system. Many IBM-based PCs are shipped with OS/2 preinstalled.

UNIX is a multi-user operating system that allows multiple users to access the system. Traditionally, UNIX run on a larger mini computer to which users accessed the systems using terminals and not PC's. UNIX allowed each user to simultaneously run the programs they desired. Unlike NT and OS/2, UNIX is not DOS compatible. Most users would not purchase UNIX for their own use.

Windows 95 & 98 (Windows 2000) are the most popular user-oriented operating systems with a friendly interface and multitasking capabilities. The usage of Windows 95 and its enhanced version Windows 98 is so simple that even little kids learn how to use it very quickly. Windows 95 and 98 are DOS compatible, so all programs written for DOS may work under the new operating system.

Windows 95 requires 486 processor with 16 megabytes of RAM or Pentium 75-90 with 40 megabytes of free hard disk space.

 

Текст 2

HISTORY OF ROBOTICS

 

The concept of robots dates back to ancient times, when some myths told of mechanical beings brought to life. Such automata also appeared in the clockwork fig­ures of medieval churches, and in the 18th century some clockmaker s gained fame for the clever mechanical fig­ures that they constructed. Today the term automaton is usually applied to these handcrafted, mechanical (rather than electromechanical) devices that imitate the motions of living creatures. Some of the «robots» used in advertising and entertainment are actually automata, even with the addition of remote radio control.

The term robot itself is derived from the Czech word robota, meaning «compulsory labour». It was first used by the Czech novelist and playwright Karel Chapek, to describe a mechanical device that looks like a human but, lacking human sensibility, can perform only automatic, mechanical operations. Robots as they are known today do not only imitate human or other living forms. True robots did mot become possible, however, until the inven­tion of the computer in the 1940s and the miniaturiza­tion of computer parts. One of the first true robots was an experimental model designed by researchers at the Stanford Research Institute in the late 1960s. It was ca­pable of arranging blocks into stacks through the use of a television camera as a visual sensor, processing this information in a small computer.

Computers today are equipped with microprocessors that can handle the data being fed to them by various sensors of the surrounding environment. Making use of the principle of feedback, robots can change their opera­tions to some degree in response to changes in that envi­ronment. The commercial use of robots is spreading, with the increasing automation of factories, and they have become essential to many laboratory procedures. Japan is the most advanced nation exploring robot technology. Nowadays robots continue to expand their applications. The home-made robots (горничная) available today may be one sign of the future.

 

Текст 3

COMPUTERS

 

Computer is an electronic device that can receive a program (a set of instructions) and then carry out this program by calculating numerical information.

The modern world of high technology is possible mainly due to the development of the computer. Com­puters have opened up a new era in manufacturing by means of automation, and they have enhanced modern communication systems.

Personal computers

Personal computers are also called microcomputers or home computer. The most compact are called laptops. They are portable and work on built-in batteries.

Personal computers are designed for use at homes, schools, and offices. At home they can be used for home management (balancing the family finances, for exam­ple) and for playing computer games, watching films or listening to music. Schoolchildren can use computers for doing their homework and many schools now have computers for independent learning and computer-literacy studies. In the office personal computers may be used for word processing, bookkeeping, storage and handling of necessary information.

Personal computers were made possible by two tech­nical innovations in the field of microelectronics: the integrated circuit, or IС, which was developed in 1959 and the microprocessor that first appeared in 1971. The IС permitted the miniaturization of computer-memory circuits, and the microprocessor reduced the size of a computer’s CPU to the size of a single silicon chip.

Because a CPU calculates, performs logical opera­tions, contains operating instructions, and manages data flows, a complete microcomputer as a separate system was designed and developed in 1974.

In 1981, IBM Company offered its own microcomputer model, the IBM PC that became a necessary tool for al­most every business. The PC’s use of a 16-bit microproc­essor initiated the development of faster and more pow­erful personal computers, and its use of an operating system that was available to all other computer makers led to a standardization of the industry.

In the mid-1980s, a number of other developments were especially important for the growth of personal com­puters. One of these was the introduction of a powerful 32-bit CPU capable of running advanced operating sys­tems at high speeds.

Another innovation was the use of conventional oper­ating systems, such as UNIX, OS/2 and Windows. The Apple Macintosh computers were the first to allow the user to select icons – graphic symbols of computer func­tions – from a display screen instead of typing commands. New voice-controlled systems are now available, and users are able to use the words and syntax of spoken language to operate their personal computers.

All sorts of things are available on the WWW. One can use Internet for recreational purposes. Many TV and radio stations broadcast live on the WWW. Essentially, if something can be put into digital format and stored in a computer, then it’s available on the WWW. You can even visit museums, gardens, cities throughout the world, learn foreign languages and meet new friends. And, of course, you can play computer games through WWW, competing with partners from other countries and continents.

Just a little bit of exploring the World Wide Web will show you what a lot of use and fun it is.

 

Текст 4

In 1981, IBM Company offered its own microcomputer model, the IBM PC that became a necessary tool for al­most every business. The PC's use of a 16-bit microproc­essor initiated the development of faster and more pow­erful personal computers, and its use of an operating system that was available to all other computer makers led to a standardisation of the industry.

In the mid-1980s, a number of other developments were especially important for the growth of personal com­puters. One of these was the introduction of a powerful 32-bit CPU capable of running advanced operating sys­tems at high speeds.

Another innovation was the use of conventional oper­ating systems, such as UNIX, OS/2 and Windows. The Apple Macintosh computers were the first to allow the user to select icons - graphic symbols of computer func­tions - from a display screen instead of typing commands. New voice-controlled systems are now available, and users are able to use the words and syntax of spoken language to operate their personal computers.

 

Текст 5

Software is the final computer system component. These computer programs instruct the hardware how to conduct processing. The computer is merely a general-purpose machine which requires specific software to per­form a given task. Computers can input, calculate, compare, and output data as information. Software deter­mines the order in which these operations are performed.

 

Data communication within and between computers systems is handled by system software. Communications software transfers data from one computer system to another. These programs usually provide users with data security and error checking along with physically transferring data between the two computer's memories, during the past five years the developing electronic network communication has stimulated more and more companies produce various communication software, such as Web-Browsers for Internet.

 

Data communication within and between computers systems is handled by system software. Communications software transfers data from one computer system to another. These programs usually provide users with data security and error checking along with physically transferring data between the two computer's memories, during the past five years the developing electronic network communication has stimulated more and more companies produce various communication software, such as Web-Browsers for Internet.

 

Текст 6

 

Yet, in spite of all the informality, Americans, even in the way they address each other, show consciousness of social distinction. For example, one is likely to use some­what more formal language when talking to superiors. While the informal "Hello" is an acceptable greeting from employee to employer, the employee is more apt to say "Hello, Mr. Ferguson," while the employer may reply "Hello, Jim." Southerners make a point of saying "Yes, sir," or "Yes, Ma'am," or "No, sir," or "No, Ma'am," when talking to an older person or a person in a position of authority. While this is good form all over the United States, "Yes, Mr. Weston" or "No, Mrs. Baker" is somewhat more common in a similar situation in the North or West.

Certain other forms of politeness are observed on social occasions. Women may wear hats in church, in restaurants, and often when attending luncheons in public places and other public social functions except those that take place in the evening. Men who do wear hats ordinarily remove them in elevators, churches, restaurants, private homes, business offices — in fact, in most public situations when they wish

Текст 7

 

During the 1960s there was a significant increase in the number of new universities, reflecting a fast growth in student numbers. During the 1980s, an expansion in higher education places led to another large jump in stu­dent numbers. In the 1992-1993 academic year there were more than 1.4 million students in full or part-time higher education in Great Britain, compared with just under 850,000 a decade earlier. About one quarter of young people are in higher education in England, Wales, and Scotland; one third in Northern Ireland. About 90 per cent of students get state grants to cover tuition fees and living costs.

The size of the grant is determined by parent’s income. Since the late 1980s, however, grants have been frozen; students can apply for a student loan.

The Romans were the first to settle and occupy the Celtic fortress of Londinium. Bridge in 100 A.D. London soon became a busy commercial and administrative settle­ment.

The Roman Empire fell in the 5^th century. London has maintained its trading activity. In the 9^th century Danish invaders destroyed much of the city. They were followed by the Saxons led by King Alfred the Great, who entered the city in 886. The Danes remained a powerful force in England, however, and it was not until the reign of Edward the Confessor, which began in 1042, that civic stability was re-established, to be cemented by the Nor­man Conquest in 1066.

 

Текст 8

Roads and Railways

 

The transport network spreads into all sections of the country, but the web of railways and highways is much denser in the eastern half of the United States.

In the early 1990s the United States had about 6.24 million km of streets, roads, and highways. The Na­tional Interstate Highway System, 68,449 km in length in the early 1990s, connected the nation's principal cit­ies and carried about one-fifth of all the road and street traffic.

More than 188 million motor vehicles were registered in the early 1990s. More than three-quarters were cars - one for every two persons in the country. About one-fifth of the vehicles were Lorries. Amtrak (the National Rail­road Passenger Corporation), a federally subsidized con­cern, operates almost all the inter-city passenger trains in the United States; it carried more than 22 million pas­sengers annually in the early 1990s.