Vocabulary: Parts of a Computer

hardware/ software peripherals central processor unit (CPU) input device output device storage device system unit electronic board motherboard component Read Only Memory (ROM) Random Access Memory (RAM) instruction connector expansion slot expansion card memory board memory slot sound facility sound card loudspeaker power supply hard disk drive floppy disk drive CD-ROM / DVD drive multimedia computer

power speed capacity size unit of measurement decimal system binary system character v. include contain consist of attach hold connect control process plug add upgrade replace depend on measure adj. empty additional extra fixed removable

Unit 3 Input Devices

An input device is any peripheral (piece of computer hardware equipment) which allows us to enter information into the computer. The most common are the keyboard and the mouse. We can also interact with a computer by using one of these: a lightpen, a scanner, a trackball, a graphics tablet, a game controller, a joystick, a digital camera, a barcode reader, a touchscreen, a touchpad, a webcam or a microphone.

Match these pictures of input devices with their names

Reading

Each text describes one of these devices:

А trackball, a joystick, a lightpen, a scanner, a gamepad.

Identify the device each text describes.

1. A ______________ can be used to draw pictures directly onto a computer screen or to read the pattern on a barcode. A _______________ that can read barcodes detects the difference between the light reflected from a black barcode line and its lighter background.

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. 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.

4. A _____________ is a type of game controller held in two hands, where the digits (especially thumbs) are used to provide input. _____________s generally feature a set of action buttons and a direction controller.

5. A ______________ is another input device you can use to play games. 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.

Language work: _{Describing functions and features}