Optical input devices

Standard input devices

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Terms to learn

Unit 6

1trackerball, n	шаровой указатель
2 joystick, n	джойстик
3 touch(-sensitive)screen, n	сенсорный экран
4 lightpen, n	световое перо
5 lever, n	рычаг, средство воздействия
6 graphics tablet, n	графический планшет
7scanner, n	сканер
8 digital camera, n	цифровой фотоаппарат
9 microphone, n	микрофон
10 optical character recognition, n	оптическое распознавание знаков
11solid state memory, n	твердотельная память
12 to download, v	загружать, скачивать
13 LCD(Liquid-Crystal Display), n	жидко-кристаллический (ЖК) экран
14charge-coupled device, n	прибор с зарядовой связью, ПЗС
15 analog-to-digital converter, n	преобразователь из аналоговой формы в цифровую, цифратор
16 webpage, n	Web -страница, веб-страница, веб-документ, Интернет-страница
17 touchpad, n	сенсорная панель
18 binary, adj	двоичный (представленный в двоичной системе счисления)

Input Devices

A variety of input devices can be connected to a computer to allow the user to input different kinds of data and to control the computer in different ways. Some common input devices and their functions are shown in the tables below.

Device	Comments
keyboard	Main input device for controlling the computer and inputting text and numerical data
Cursor control input devices
Device	Comments
mouse	Common input device for use with a graphical user interface. The mouse sometimes has a ball underneath that is rolled on a mousemat.
trackerball	It is like a mouse turned upside down. The trackerball remains in one position while user rotates a small ball on top.
joystick	A vertical lever allows the user to control the cursor precisely and at high speed. Particularly good for playing fast action games.
touchscreen	The user interacts with a computer by lightly pressing their finger on a touch-sensitive area of the monitor screen.

Device	Comments
Lightpen	It detects differences in reflected light. It can be used for drawing directly on the monitor screen or for reading printed optical characters or barcodes.
Graphical tablet	Used with a lightpen for drawing. The user draws on the tablet with a lightpen as if they were drawing on a sheet of paper.
Barcode reader	A special kind of lightpen for reading barcodes. Barcodes are used to identify items for stock control and pricing.
Scanner	Used to input text and graphics from a printed page.
Digital camera	Used to take pictures of an object. The picture is stored electronically and can be edited using a computer.
Voice input device
Device	Comments
Microphone	Used to input sound

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