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UNIT I

Lesson 1

T he definition of a computer

A computer is an electronic machine which calculates all the mathematical and logical problems.

A computer is a machine that is able to take information (input), do some work on or make changes to the information, to make new information (output). Computers have existed for much of human history. Examples of early computers are the astrolabe and the abacus.

Modern computers are very different from early computers. They are now very powerful machines that are able to do billions of calculations every second. Most people have used a personal computer in their home or at work. Computers are useful for many different jobs where automatic functions are useful. Some examples are controlling traffic lights, vehicle computers, security systems, washing machines and digital televisions.

A person (called a user) can control a computer by telling it to do things. Some ways of controlling a computer are with a keyboard, mouse, buttons, touch screen. Some very new computers can also be controlled with voice commands or hand gestures.

  1. Find the English equivalents in the text:

Обчислювати, бути здатним, вносити зміни, існувати, астролябія, рахівниця, потужна машина, використовувати комп’ютер, світлофор, автомобільний комп’ютер, спосіб контролю, голосова команда.

  1. Translate the following words and word-combinations:

Electronic machine, to be different, billions of calculations, personal computer, automatic functions, security systems, washing machines, digital television, keyboard, mouse, buttons, touch screen, hand gestures.

  1. Answer the following questions:

  1. What is a computer?

  2. What is a computer able to do?

  3. What is an example of early computer?

  4. What is a modern computer?

  5. Where is a computer useful?

  6. What are the ways of controlling a computer?

  7. How can the latest computers be controlled?

  1. Match the definitions to the notions:

machine

electronic visual display that the user can control through simple or multi-touch gestures by touching the screen with one or more fingers

input

a pointing device that functions by detecting two- dimensional motion relative to its supporting surface

output

a typewriter-style device, which uses an arrangement of buttons or keys

abacus

an exit or changes which exit a system and which activate/modify a process

astrolabe

an entrance or changes which are inserted into a system and which activate or modify a process

keyboard

a tool that consists of one or more parts, and uses energy to achieve a particular goal

mouse

an elaborate inclinometer, historically used by astronomers, navigators and astrologers

touch screen

a calculating tool used for performing arithmetic processes

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