I. Rewrite and translate written text into Russian
There are several devices used for inputting information into the computer: a keyboard, some coordinate input devices, such as manipulators
(A mouse, a track ball), touch panels and graph¬ical plotting tables, scanners, digital cameras, TV tuners, sound cards etc.
When personal computers first became popular, the most common device used to transfer information from the user to the computer was the keyboard.
Later when the more advanced graphics became to develop, user found that a keyboard did not provide the design capabili¬ties of graphics and text representation on the display. There appeared manipulators, a mouse and
a track ball, that are usu¬ally used while operating with graphical interface. Each software program uses these buttons differently.
The mouse is an optic-mechanical input device. The mouse has three or two buttons which control the cursor movement across the screen. The mouse provides the cursor control thus simplifying user's orientation on the display. The mouse's pri¬mary functions are to help the user draw, point and select im-ages on his computer display by moving the mouse across the screen.
In general software programs require to press one or more buttons, sometimes keeping them depressed or double-click them to issue changes in commands and to draw or to erase images. When you move the mouse across a flat surface, the ball located on the bottom side of the mouse turns two rollers.
In portable computers touch panels or touch pads are used instead of manipulators. Moving a finger along the surface of the touch pad is transformed into the cursor movement across the screen.
Graphical plotting tables (plotters) find application in draw¬ing and inputting manuscript texts. You can draw, add notes and signs to electronic documents by means of a special pen. The quality of graphical plotting tables is characterized by permit¬ting capacity, that is the number of lines per inch, and their ca¬pability to respond to the force of pen pressing.
Scanner is used for optical inputting of images (photogra¬phies, pictures, slides) and texts and converting them into the computer form.
Digital videocameras have been spread recently. They enable getting videoimages and photographs directly in digital comput¬er format. Digital cameras give possibility to get high quality photos.
Sound cards produce sound conversion from analog to digi¬tal form. They are able to synthesize sounds. Special game-ports and joysticks are widely used in computer games.
II. In writing, answer the following questions
1. What devices are used for inputting information into the computer?
2. What was the most common device in early per¬sonal computers?
3. What is the function of a keyboard?
4. How does the mouse operate?
5. What role does the ball on the bottom of the mouse play?
6. What is the touch pad's principle of operation?
III. Put the following words and phrases in English
introduction of information
pointing device vvo¬da
control the movement of the cursor
hold down the button
follow the vertical movement
easy to slide
IV. Turn suggestions on the Russian language, paying attention to design "for + Infinitive" and "Objective with the Infinitive"
V. Relate English sentence with its translation
VI. Put the question to the proposal to the subject, common alternative, the separation and the special issues
VII. Choose the correct answer