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3. What are the functions of dedicated keys?
4. What is a mouse?
5. What are mouse actions?
10. Find the words and word combinations (1–15) in the
text above. Can you guess the meaning from context? Give
Russian equivalents.
1. Input devices
2. Pointing devices
3. Game controllers
4. Light pen
5. Trackball
6. Graphics tablet
7. Cursor control keys
8. To interact with graphical
user interfaces
9. Alphanumeric keys
10. Function keys
11. Dedicated keys
12. Numeric keypad
13. To click, to double-
click, to right-click
14. To drag
15. Barcode reader
11. Read Text B:
Text B
Input Devices: The Eyes of your PC
Scanners
A scanner is a peripheral that reads images and converts them
into electronic codes which can be understood by a computer. The
paper with the image is placed face down on a glass screen, as
with a photocopier. Beneath the glass are the lighting and meas-
urement devices. Once the scanner is activated, it reads the image
as a series of dots and then generates the digitized image that is
sent to the computer and stored as a file. The scanner operates by
using three rotating lamps, each of which has a different coloured
filter: red, green and blue. The resulting three separate images are
combined into one by appropriate software.
There are different types of scanners:
Image scanner, which digitizes a two-dimensional image.
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3D scanner, which digitizes the three-dimensional shape of a
real object.
Достарыңызбен бөлісу: 
