Additional hardware

In addition to the basic components, most computer systems include other hardware, such as a printer, a mouse, and possibly a modem.

Peripheral devices of the PC are connected to its interfaces and intended for execution of auxiliary operations. Due to them the computer system gains flexibility and scalability.

Device of command handle – the mouse and special manipulators: the trackball (installed permanently, the ball is actuated by a palm), pen mouse (clone of a ball pen), the infra-red mouse (wireless link with a system unit.).

Devices of input of graphic data are scanners (intended for input of the graphics information on paper), data tablets (intended for input artistic graphic information) and digital cameras.

As the output device of the data, in addition to the screen monitor, use printing stations – printers, permitting to receive copies of documents on a paper or transparent carriers. By a principle of operation, distinguish matrix, laser, and ink-jet printers. A printer prints the information processed by your computer. Printers vary in printing speed and output capabilities. For example, some letter–quality printers can print high–quality text quickly; some dot matrix and laser printers can print both text and graphics.

The mouse is the control unit manipulation type. As against the keyboard the mouse cannot be used on a straight line for input of the sign information – the principle of handle is event. Movements of the mouse and clicks of buttons are events.

By using a mouse, you can move a pointer on your screen. You change the position of the pointer by moving the mouse across your table or desktop. You can also use a mouse to select an item by pointing to it and then clicking a button.

Modem – the device intended for information interchange between remote computers. Key parameters of the modem: productivity (bits/s), supported communications protocols and error corrections, the bus interface (ISA or PCI).

A modem connects your system to a telephone line so that you can communicate with another computer in another building, or even across the country. You can use a modem to receive business information from services like the Dow Jones News Retrieval and CompuServe Information Service.

2. Give Russian equivalents to the word-combinations:

in addition to move a pointer

to change a position printing speed

output capabilities high quality texts

basic components to use a mouse

to connect a system to a telephone to select an item

to communicate with another computer even across the country

News Retrieval dot matrix and laser printers

3. Give definitions to the following using the vocabulary:

1) CPU 6) Video card

2) Printer 7) Mouse

3) Modem 8) Port

4) Keyboard 9) Screen

5) Sound card

4. Make up your stories about hardware using texts that you have read in Units I, II, III. Retell your stories.

UNIT IV

1. Read and learn the words:

reusable – сменный, съeмный

reusable storage device – съемное (сменное) запоминающее устройство

safekeeping – безопасное хранение

hard disk drive (HDD) – дисковод жесткого диска (винчестер)

floppy disk drive – дисковод гибкого диска

to remove – удалить, убрать, сдвинуть

non-removable disk – несъемный диск

removable – съемный

storage capacity – объем хранения (информации)

to indicate – показывать, указывать

indicator – указатель, индикатор

to call – называть, обозначать

flexible –гибкий

to protect – защищать

to cover – закрывать, защищать

cover – крышка, покрытие, защитный слой

to mirror – отражать

to record – записывать

capacity – объем

surface – поверхность

ray – луч

2. Read and translate the text:

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