На пути в научную библиотеку

11.command

12.frequently

Part 3

Systems software

A computer’s operating system (OS) is the systems software that allows all the dissimilar hardware and software components to work together. It consists of a set of programs that manages all the computer’s resources, including the data in main memory and in auxiliary storage. An OS provides services that are needed by applications and software, such as reading data from a hard disk. Parts of an OS may be permanently stored in a computer’s ROM.

Computers write data to, and read from, auxiliary storage in collections called fi les. The fi le system of an OS allows programs to give names to fi les, and it keeps track of each fi le’s location. A fi le system can also group fi les into directories or folders.

An OS allows programs to run. When a program is running, it is in the process of instructing the computer. For example, when a user plays a video game, the video-game program is running. An OS manages processes, each of which consists of a running program and the resources that the program requires. An advanced OS supports multiprocessing to enable several programs to run simultaneously. It may also include networking services that allow programs running on one computer to communicate with programs running on another.

Modern operating systems provide a graphical user interface (GUI) to make the applications software easier to use. A GUI allows a computer user

to work directly with an application program by manipulating text and graphics on the monitor screen through the keyboard and a pointing device such as a mouse rather than solely through typing instructions on command lines. The Apple Computer company’s Macintosh computer, introduced in the mid-1980s, had the fi rst commercially successful GUI-based software.

(adopted from «computer.» Britannica Student Library. Encyclopædia Britannica. Chicago: Encyclopædia Britannica, 2007.)

Exercise 1. Look through the text and copy out proper names and numerals.

Exercise 2. Look through the text and define which of the following keywords are mentioned in it.

binary language fi le system folder graphical user interface microchips

Exercise 3. In what context are the proper names and numerals from Exercise 1 mentioned?

Exercise 4. Are the following statements true or false?

1.An operating system consists of a set of programs that manages the data in main memory and in auxiliary storage.

2.An operating system provides services that are used neither by applications nor software.

3.An operating system keeps track of each fi le’s location.

4. A fi le system groups fi les into directories, and directories are grouped into folders.

5.An operating system manages processes consisting of a running program and the resources that it requires.

6.Any operating system supports multiprocessing to enable several programs to run simultaneously.

7.A graphical user interface allows a computer user to work directly with an application program by typing instructions on command lines.

Exercise 5. Answer the following questions:

1.What is an operating system needed for?

2.What does an operating system consist of?

3.What is a fi le system and what can it do?

4.What is happening when a program is running?

5.What can an advanced operating system do?

6.What is a GUI and what is its function?

Exercise 6. Match the word or phrase with its definition.

11.text

12.type

Unit 4. Manufacturers

Part 1

Exercise 1. Put the sentences into the proper order and read the whole paragraph.

a.The success of the Macintosh prompted other manufacturers and software companies to create their own graphical user interfaces.

b.The Apple Macintosh, introduced in 1984 by Apple Computer, was the fi rst popular microcomputer with a graphical user interface.

c.The success of PCs running Microsoft’s Windows 3, launched in 1990, put pressure on Apple and the arrival of Windows 95 started Apple’s decline.

d.Most notable of these are Microsoft Windows, which runs on IBM PC-com- patible microcomputers, and OSF/Motif, from the Open Software Foundation, which is used with many UNIX systems.

Exercise 2. Fill in the gaps with the words from the box and read the whole paragraph.

backed backing behemoth cheaper enabling founders licensing marketing strategy

In 1977, Apple’s (1) … Steve Jobs and Steve Wozniak received (2) … from a rich venture capitalist, Mike Markkula, who (3) … the production of the Apple II. Apple’s early market lead in personal computing was destroyed by the entry of the computer industry’s (4) … , IBM in 1981. Apple’s imaginative response - the Macintosh, launched 1984 – was a proprietary design and was never able to gain enough market share to compete with thousands of fi rms making computers (5) … with IBM ‘s PCs. In 1994 Apple licensed the Macintosh for the fi rst time, thus (6) … other manufacturers to make (7) … machines, the fi rst appearing 1996. Unfortunately Apple proved unable to compete and reversed its licensing (8) …, buying its license back from Power Computing, and leading Motorola to leave the clone business in 1997.

Exercise 3. Put the words and phrases of the given sentences into the proper order and read the whole paragraph.

1.not/Apple’s/is/assured/long term/future.

2.However/industries/for these applications/following /the Macintosh/a very strong/in the creative world/particularly/the most popular software/and the multimedia/thanks to/in the publishing/of/and the availability/still has/its ease of use.

3.Apple/invested/In/in/Microsoft/$150 million/1997.

Exercise 4. Look through the paragraphs above and give the title to the whole text.

Exercise 5. Match the word or phrase with its definition.

(adopted from «Macintosh.» The Hutchinson Educational Encyclopedia on CD-ROM, 1999.)

Part 2

IBM

International Business Machines (IBM) is a multinational company, the largest manufacturer of computers in the world. The company is a descendant of the Tabulating Machine Company, formed in 1896 by US inventor Herman Hollerith to exploit his punched-card machines. It adopted its present name in 1924. IBM became an important patron of modern design in the post-1945 years. By 1991 it had an annual turnover of $64.8 billion and employed about 345,000 people, but in 1992 and 1993 it lost billions of dollars and shed almost half its 420,000 staff. The company acquired Lotus Development Corporation in 1995. By 1997 IBM had, under new management, recovered fi nancially, with an annual turnover of $76 billion, which means it is still a dominant industry player. Its acquisition of the Lotus Development Corporation gave IBM access to its wide range of innovative software, including the 1-2-3 spreadsheet and Notes, a market leader in groupware.

Founded in 1924, by former cash register salesman Tom Watson, IBM grew to monopolize the mechanical data processing business, and in the 1950s, thanks mainly to Tom Watson Jr, quickly took over the new electronic (computer-based) data processing business, too.

IBM’s sales increased from $734 million in 1956 to $51 billion in 1986, when the company dominated most computer markets: mainframes, minicomputers, personal computers and networking. However, the rise of powerful microprocessors and the `open systems´ movement destroyed much of IBM’s power.

(adopted from «IBM.» The Hudchinson Educational Encyclopedia on CD-ROM, 1999.)

Exercise 1. Look through the text and copy out proper names and numerals.

Exercise 2. Look through the text and define which of the following keywords are mentioned in it.

anticompetitive behaviour design IBM Internet browsers software

Exercise 3. In what context are the proper names and numerals from Exercise 1 mentioned?

Exercise 4. Are the following statements true or false?

1.IBM is the largest manufacturer of computers in the world.

2.The company was named IBM in 1896.

3.In 1992 and 1993 it employed about 345,000 people.

4.New management made the company recover fi nancially by 1997.

5.Its acquisition of the Lotus Development Corporation was a big mistake.

6.First the company monopolized the mechanical data processing business, and then electronic data processing business.

7.Now most of IBM’s power is destroyed.

Exercise 5. Answer the following questions:

1.What company was founded in 1896?

2.When IBM had the most power of its history?

3.When did the crisis of IBM happen?

4.When and why did it recover fi nancially?

5.What did IBM benefi t from its acquirement of Lotus Development Corporation?

6.Who and when founded IBM?

7.Why is now much of IBM’s power destroyed?

Exercise 6. Match the word or phrase with its definition.

11.monopolize

12.`open system´

Part 3

Microsoft

Microsoft is a US corporation, now the world’s largest software supplier. Microsoft’s fi rst major product was a version of Basic, written for the MITS Altair 1975, and adopted by most of the desktop computer industry. Through MS-DOS, written for IBM, Windows, and related applications it has steadily increased its hold on the personal computer market. Microsoft was founded by Bill Gates and Paul Allen in 1975.

Together with Intel, the company supplied operating systems and computer chips for about 90% of the world’s personal computers in 1997. In 1996, Microsoft launched another new operating system, Windows CE (Consumer Electronics), for handheld computers, pen-operated personal digital assistants, in-car systems and similar applications. Suppliers of CE-based HPCs (handheld personal computers) include Casio, Compaq, Hewlett-Packard, Philips and Sharp. Windows CE version 2 is also used in an improved version of WebTV: a set-top box that enables users to surf the Internet on their television sets. Microsoft purchased WebTV Networks for $425 million in 1997. The fi rst companies to supply WebTV systems were Philips, Sony and Mitsubishi.

In 1990-1993 Microsoft was charged with engaging in anticompetitive behaviour. Under a settlement reached in 1994, Microsoft agreed to end the uncompetitive practice `per processor´ pricing, whereby PC manufacturers paid a fee for each machine produced irrespective of the software to be installed. The Justice Department started another case in 1997, accusing Microsoft of breaking this settlement by tying the installation of Windows 95 to the installation of Microsoft’s free Web browser, Internet Explorer. In May 1998 Microsoft was accused of abusing its monopoly power against Netscape, its main competitor in Internet browsers.

(adopted from «Microsoft.» The Hutchinson Educational Encyclopedia on CD-ROM,

1999.)

Exercise 1. Look through the text and copy out proper names and numerals.

Exercise 2. Look through the text and define which of the following keywords are mentioned in it.

handheld computers monopoly multinational company operating system punched-card machines

Exercise 3. In what context are the proper names and numerals from Exercise 1 mentioned?

Exercise 4. Are the following statements true or false?

1.Microsoft now supplies the most part of the software in the world.

2.Microsoft’s version of Basic was adopted by most of the desktop computer industry.

3.In 1997 the company alone supplied operating systems and computer chips for about 90% of the world’s personal computers.

4.Windows CE was designed for desktop computers.

5.WebTV enables users to access to the Internet on their television sets.

6.In 1994 Microsoft was made to end its anticompetitive behaviour.

7.In May 1998 Microsoft broke this settlement.

Exercise 5. Answer the following questions:

1.What was Microsoft’s fi rst major product?

2.What Microsoft operating systems are mentioned in the text?

3.What devices use Windows CE?

4.What companies are the suppliers of CE-based handheld personal computers?

5.What is WebTV?

6.What did Microsoft promise to do in the agreement of 1994?

7.How did Microsoft break this agreement?

Exercise 6. Match the word or phrase with its definition.

11.case

12.abuse

Unit 5. The Internet

Part 1

Exercise 1. Put the sentences into the proper order and read the whole paragraph.

a.Once in the computer, the information is categorized and cross-indexed.

b.Organizations that have large amounts of printed information, such as major

libraries, universities, and research institutes, are working to transfer their information into databases.

c.The advent of the Internet and the World Wide Web caused a revolution in the availability of information not seen since the invention of the printing press.

d.Many people purchase home computers so they can access the Web in the privacy of their homes.

e.This revolution has changed the ways many people access information and communicate with each other.

f.When the database is then put onto a Web server, users can access and search the information using the Web, either for free or after paying a fee.

Exercise 3. Fill in the gaps with the words from the box and read the whole paragraph.

access alternative broadcast digital information newsagency organizations organizations recorded server

The information superhighway, as the Internet is sometimes called, provides

(1)… to live, instantaneous information from a variety of sources. People with

(2)… cameras can record events, send the images to a Web (3) … , and allow people anywhere in the world to view the images almost as soon as they are (4) …. Many major newsgathering (5) … have increased their use of the Web to (6) … their stories. Smaller, independent news sources and (7) … , which may not be able to afford to broadcast or publish in other media, offer (8) … coverage of events on the Web.

Exercise 2. Put the words and phrases of the given sentences into the proper order and read the whole paragraph.

1.People/ messages / or / with each other / to communicate / live conversations / the information superhighway / through e-mail/ personal Web pages» /where /individuals/ throughout the world /can type /to carry on/can use/Internet «chat rooms.

2.for/is/almost/sharing information/opinions/The potential/limitless/and.

Exercise 4. Look through the paragraphs above and give the title to the whole text.

Exercise 5. Match the word or phrase with its definition.

11.broadcast

12.alternative

(adopted from «computer.» Britannica Student Library. Encyclopædia Britannica. Chicago: Encyclopædia Britannica, 2007.)

Part 2

The Internet explosion

Perhaps no single technical advance has had such a broad impact on business, education, and culture as the Internet, a vast computer network accessed by millions of users around the world. The Internet has transformed the way people communicate by enabling millions of subscribers to send mail and access information instantly.

What began in 1970 as a network of computers supported by the United States Department of Defense quickly grew in the late 1980s and 1990s to include universities, federal agencies, businesses, and individuals. One Internet application in particular, the World Wide Web, attracted users with its ease of use and expanse of information.

As its popularity has grown, the Internet has become the backbone of the modern, information-driven economy. It has been a major force behind the globalization of business, giving companies a new way to connect with existing and potential customers around the world. The Internet has also become a major source of «infotainment» for young and older people alike, allowing them to chat with other users and fi nd resources on every hobby and interest imaginable.

While the Internet has proven to be an invaluable source for educational information, it also is a method for disseminating pornography and other «indecent» material. Although no single authority regulates the Internet, numerous legislative initiatives have targeted it for censorship. As Internet use became increasingly widespread in subsequent years, regulation remained a frequent topic of debate.

(adopted from «computer.» Britannica Student Library. Encyclopædia Britannica. Chicago: Encyclopædia Britannica, 2007.)

Exercise 1. Look through the text and copy out proper names and numbers.

Exercise 2. Look through the text and define which of the following keywords are mentioned in it.

censorship download globalization network Web sites

Exercise 3. In what context are the proper names and numbers from Exercise 1 mentioned?

Exercise 4. Are the following statements true or false?

1.The Internet has had the broadest impact on business, education, and culture compared with other technical advances.

2.The Internet began in 1970 as a network of computers supported by the United States Department of Defense.

3.From the very beginning the Internet included universities, federal agencies, businesses, and individuals.

4.The World Wide Web is one of the Internet applications.

5.The Internet has speeded up the globalization of business.

6.The Internet has become a major source of «infotainment» for young people only.

7.The Internet has proven to be an invaluable source of always reliable information.

Exercise 5. Answer the following questions:

1.What had the Internet have the impact on?

2.How has the Internet transformed the way people communicate?

3.When did the Internet advent?

4.What did the popularity of the Internet bring?

5.What is «infotainment»?

6.Why is the Internet a source of «indecent» material?

7.What remained a frequent topic of debate concerning the Internet?

Exercise 6. Match the word or phrase with its definition.

11.indecent

12.censorship

Part 3

World Wide Web

British physicist Tim Berners-Lee invented the World Wide Web in 1992 as a way to organize and access information on the Internet. Its introduction caused the popularity of the Internet to explode nearly overnight. Instead of being able to download only simple linear text, with the introduction of the World Wide Web users could download Web pages that contain text, graphics, animation, video, and sound. A program called a Web browser runs on users’ PCs and workstations and allows them to view and interact with these pages.

Many commercial companies maintain Web sites, or sets of Web pages, that their customers can view. The companies can also sell their products on their Web sites. Customers who view the Web pages can learn about products and purchase them directly from the companies by sending orders back over the Internet. Buying and selling stocks and other investments and paying bills electronically are other common Web activities.

Many organizations and educational institutions also have Web sites. They use their sites to promote themselves and their causes, to disseminate information, and to solicit funds and new members. Some political candidates, for example, have been very successful in raising campaign funds through the Internet. Many private individuals also have Web sites. They can fill their pages with photographs and personal information for viewing by friends and associates.

Web sites are maintained on computers called Web servers. Most companies and many organizations have their own Web servers. These servers often have databases that store the content displayed on their sites’ pages. Individuals with Web sites can use the Web servers of their Internet service providers.

(adopted from «computer.» Britannica Student Library. Encyclopædia Britannica. Chicago: Encyclopædia Britannica, 2007.)

Exercise 1. Look through the text and copy out proper names and numbers.

Exercise 2. Look through the text, and define which of the following keywords are mentioned in it.

censorship commercial companies customers subscribers Web site

Exercise 3. In what context are the proper names and numbers from Exercise 1 mentioned?

Exercise 4. Are the following statements true or false?

1.The World Wide Web was invented in 1992 as a way to organize and access information on the Internet.

2.Users with the help of the World Wide Web could download simple linear text.

3.A Web browser allows users to view and interact with Web pages.

4.Customers can learn about products and purchase them directly from the companies by sending orders over the Internet, but cannot buy and sell stocks and other investments and paying bills.

5.Many organizations successfully use their sites to promote themselves and their causes, to disseminate information, and even to solicit funds and new members.

6.Many private individuals have Web servers rather than use the Web

servers of their Internet service providers.

7. Web servers often have databases that store the content displayed on their sites’ pages.

Exercise 5. Answer the following questions:

1.Who invented the World Wide Web?

2.How did the World Wide Web change the Internet?

3.What allows users to view and interact with Web pages?

4.What can customers do over the Internet?

5. What do organizations and educational institutions use their Web sites for?

6.What can private individuals use their Web sites for?

7.What is the Web server and what does it contain?

Exercise 6. Match the word or phrase with its definition.

11.fund

12.server

Unit 6. Data Security

Part 1

Exercise 1. Put the sentences into the proper order and read the whole paragraph.

a.But after the programs are completed, they are stored on relatively inexpensive media such as CD-ROMs that can be easily copied.

b.The software industry loses billions of dollars each year to piracy.

c.Software companies and their programmers can spend many years and millions of dollars developing their programs.

d.Computer software is often much more expensive than the computer hardware that it runs on.

e.A software pirate is a person or a company that uses a copy of a program that was not purchased legitimately.

Exercise 2. Put the words and phrases of the given sentences into the proper order and read the whole paragraph.

1.to break/or/Some criminals/in order to/some damage /use/or other computer networks/a particular computer system/the Internet/into/access/forbidden information/to cause.

2.are/Such/called/users/also/hackers.

3.Many companies/use/from/that/and organizations/to protect/have/various security measures/such as/computers serving as fi rewalls/their computers/ networked computers/illegitimate access.

4.and/how/them/are familiar/know/many hackers/these measures/to get around/with/But.

Exercise 3. Fill in the gaps with the words from the box and read the whole paragraph.

Some (1) … are bent on sabotage, and (2) … are interested in stealing (3) … from the computers they break into. Many (4) …, however, do it simply for the

challenge of gaining access to (5) … inaccessible (6) …. Computers at government and military institutions are therefore often targets. Another motivation for criminals to break into government and corporate (7) … is identity theft—the unauthorized (8) … of an individual’s personal information, such as social security number and credit card account numbers. This information might be (9) … for theft or to conceal the criminal’s own identity.

Exercise 4. Look through the paragraphs above and give the title to the whole text.

Exercise 5. Match the word or phrase with its definition.

11.challenge

12.target

(adopted from «computer.» Britannica Student Library. Encyclopædia Britannica. Chicago: Encyclopædia Britannica, 2007.)

Part 2

Cybercrime

Computers, with all the benefi ts they offer, also unfortunately can enable cybercrime, or computer crime. Of course, the computers and their electronic components have always been the targets of thieves. But with the decreasing cost of hardware and the increasing value of software and information, criminals have begun to concentrate on the latter. Law-enforcement agencies throughout the world have had to learn ways to combat computer crime.

Criminals can log into the Internet just like everyone else, and they can commit crimes against other people who also are logged in. They may give out

false information to encourage others to send them money or personal information. They may also be predators who use the anonymity afforded by chat rooms and discussion groups to lure children into meeting them in person.

In an effort to sabotage other people’s computers, malevolent computer programmers (sometimes called hackers) create software that can manipulate or destroy another computer’s programs or data. The most common of such malicious programs are called viruses. A computer virus infects, or secretly runs on, a computer to cause some mischief or damage. It can attach itself to a legitimate program, often in the computer’s operating system, and then copy itself onto other programs with which it comes in contact. Worms are self-contained programs that enter a computer and generate their own commands. Viruses and worms can spread from one computer to another by way of exchanged disks, over local area networks, or over the Internet. If undetected, they may be powerful enough to cause computer systems to crash or even shut down large portions of the Internet.

(adopted from «computer.» Britannica Student Library. Encyclopædia Britannica. Chicago: Encyclopædia Britannica, 2007.)

Exercise 1. Look through the text, and define which of the following keywords are mentioned in it.

computer crime court hackers industrial espionage malicious programs

Exercise 2. Are the following statements true or false?

1.Viruses never affect legitimate programs.

2.Nowadays criminals concentrate on stealing software.

3.Viruses and worms can shut down large portions of the Internet.

4.Criminals can commit crimes against other people who are logged off.

5.Worms can be spread from one computer to another over the Internet.

6.Law-enforcement agencies always know how to combat computer crime.

7.Viruses are self-contained programs that enter a computer and generate their own commands.

Exercise 3. Answer the following questions:

1.What is a cybercrime?

2.When can criminals commit crimes against other people on the Internet?

3.What do hackers give out false information for?

4.What can malicious programs do?

5.Where can viruses and worms attach themselves?

6.What provides anonymity?

7.What is the difference between viruses and worms?

Exercise 4. Match the word or phrase with its definition.

11.operating system

12.undetected

Part 3

Industrial Espionage

On June 22, 1982, the United States Justice Department charged 18 Japanese executives with conspiring to steal computer secrets from International Business Machines (IBM) Corporation. The executives were employees of Hitachi, Ltd., and of Mitsubishi Electric Corporation. The operation was uncovered through a Federal Bureau of Investigation (FBI) «sting» operation. An FBI agent posed as a seller of the information. When the executives tried to pay for the data, they were apprehended. A year later the affair was settled out of court by an apology from the offenders and a substantial payment to IBM, a payment estimated to be 300 million dollars.

Today’s technology makes possible the introduction of more than a half million new products into the world market every year. When a new product is introduced by a company, competitors are immediately at a disadvantage and want to market something similar. Competitors are willing by fair means—and sometimes by foul—to obtain trade secrets and risk patent infringement.

Businesses threatened with industrial espionage and government installations where national security is an issue use personnel-screening devices to keep out or restrict unauthorized individuals. There are access-control systems

that «read» voice characteristics and hand geometry. Sometimes employees are required to wear distinctive badges or identifi cation tags in order to gain access to otherwise restricted areas. Some badges are designed to activate electronic door controls. There are also surveillance devices to scan premises at night, infrared cameras to take pictures in the dark, and equipment to survey considerable distances, making surreptitious approach to the premises diffi cult.

(adopted from «espionage.» Britannica Student Library. Encyclopædia Britannica. Chicago: Encyclopædia Britannica, 2007.)

(adopted from «security system.» Britannica Student Library. Encyclopædia Britannica. Chicago: Encyclopædia Britannica, 2007.)

Exercise 1. Look through the text and define which of the following keywords are mentioned in it.

anonymity offender personnel-screening devices trade secrets virus

Exercise 2. Are the following statements true or false?

1.On June 22, 1982, the United States Justice Department charged 18 Japanese executives working for International Business Machines.

2.An FBI agent pretended to be a seller of the information

3.When a new product is introduced by a company, competitors try to market a different innovation.

4.Nevertheless, competitors don’t risk patent infringement.

Exercise 3. Answer the following questions:

1.Who was trying to buy the information on June 22, 1982?

2.How many new products can be introduced into the world market every year?

3.What do companies want to do when their competitor markets something new?

4. Which companies prefer to use personnel-screening devices and why?

5.What can badges and identifi cation tags be used for?

6.What access-control equipment is mentioned in the text?

7.What other devices are mentioned in the text?

Exercise 4. Match the word with its definition.

11.survey

12.surreptitious

Unit 7. The Future of Computers

Part 1

Exercise 1. Put the sentences into the proper order and read the whole paragraph.

a.With many processors simultaneously working on a given task, the problem can be solved much more quickly.

b.Many researchers feel that the future of computer hardware might not be in further miniaturization, but in radical new architectures, or computer designs.

c.Massively parallel computers—consisting of hundreds of small, simple, but structurally linked microchips—break tasks into their smallest units and assign each unit to a separate processor.

d.For example, almost all of today’s computers process information serially, one element at a time.

Exercise 2. Fill in the gaps with the words from the box and read the whole paragraph.

breakthrough circuit hardware integration microprocessors software transfer transistor wafer

A major technology (1) … was made in 2003 by Sun Microsystems, Inc. While the integrated (2) … has enabled millions of transistors to be combined in one manufacturing process on a silicon chip, Sun has taken the next step to waferscale (3) …. Rather than producing hundreds of (4) … on each silicon wafer, cutting them into separate chips, and attaching them to a circuit board, Sun fi gured out how to manufacture different chips edge-to-edge on a single (5) …. When introduced into full-scale manufacturing, this process promises to

eliminate circuit boards, speed up data (6) … between different elements by a hundredfold, and substantially reduce the size of computer (7) ….

Exercise 3. Put the words and phrases of the given sentences into the proper order and read the whole paragraph.

1.Two/and/quantum mechanics/exotic/involve/biological genetic material/ computer research directions/the principles of/the use of.

2.In/used to gradually/with/to a problem/millions of strands of DNA/DNA computing/are used/various chemical methods/winnow out/false solutions/to test possible solutions.

3.DNA computing/however/before/have already shown/need to be developed/ Demonstrations on/routing schedules/great promise/more effi cient/laboratory techniques/fi nding/the most effi cient/becomes practical.

Exercise 4. Look through the paragraphs above and give the title to the whole text.

Exercise 5. Match the word or phrase with its definition.

11.DNA

12.winnow

(adopted from «computer.» Britannica Student Library. Encyclopædia Britannica. Chicago: Encyclopædia Britannica, 2007.)