Input devices

1. A is another input device you can connect to a computer system. The is able to move in eight directions. s are mostly used in computer games to control the way a picture on the screen moves. Sometimes two s are connected to a computer so two people can play the game at the same time.

2. A works in exactly the same way as a mouse, except that the ball is on top. The user rolls the ball around with her hand to operate it. If you use a , you don’t need any extra space on your desk to move it around (like you do with a mouse). __________ s are often used on small portable computers and on some video game machines.

3. A ___________ can be used to draw pictures directly on to a computer screen or to read the patter on a barcode. A _________ that can read barcode detects the difference between the light reflected from a black barcode line and its lighter background.

4. Using a _________ , you can input printed drawings, photographs, or text directly into a computer. A _________ works like a photocopier- a light is shone on the material and the ________ detects the reflected light. You can use a __________ with optical character recognition (OCR) software to input the scanned text into a word processing package.

Task 12. Match each device (1-7) with its use (a-g)

Device Use

1 joystick a draw pictures on to a computer screen

2 lightpen b copy documents

3 scanner c input sound

4 digital camera d input text

5 mouse e select from a menu

6 keyboard f move the cursor rapidly

7 microphone g produce photos without films

Task 13. Read and translate the text.

Output devices. Printers.

There are many different types of printer. These include inkjet, mono laser and dye sublimation printer. Basically, you get what you pay for. The more you pay, the better the computer.

Inkjet printers are the cheapest, but the print quality is not good as the other two types of printer. They are expensive to run compared to mono laser printers, but are able to print in colour. Inkjets are the noisiest of the three types of printer.

Mono laser printers are more expensive than inkjet printers but give you a better quality of black and white output. They cannot print in colour, but are the fastest type of printer and cost the least to run.

Dye sublimation printers are the most expensive type of printer, but their print quality is extremely high. They are quiet in operation, but are relatively slow and very expensive to run.

Grammar: Structure of Phrases.

Structure of phrases:

Invalid password (прил.+сущ.)

Input file (сущ.+сущ.)

Combination of keys (сущ.+of +сущ.)

Note: подчеркнуто главное, определяемое слово

Тask 14. Read and translate the following phrases, find the main word:

A database program Collection of partitions Common interface A single character Definition of data A file error The title of the window Binary file

Print device Executable file Sytem management mode Read access The string of data Common bus Mouse button

Input/output space Memry size Insert mode Database device Program execution Dialog box Development tools Shared resource