INPUT DEVICES: TYPE, CLICK AND TALK! PROFESSIONAL ENGLISH IN USE FOR COMPUTER

 

PROFESSIONAL ENGLISH IN USE FOR COMPUTER 4. INPUT DEVICES: TYPE, CLICK AND TALK!

 

A Interacting with your computer Input devices are the pieces of hardware which allow us to enter information into the computer. B The keyboard A standard PC keyboard has various groups of keys. ·         Alphanumeric keys-these represent letters and numbers, arranged as on a typewriter. ·         A numeric keypad appears to the right of the main keyboard and contains numeric and editing keys; the Num Lock key is used to switch from numbers to editing functions. ·         Function keys appear at the top of the keyboard and can be programmed to do special jobs. C The mouse A mouse is a hand-held device that lets you move a pointer (or cursor) and select items on the screen. It has one or more buttons to communicate with the PC. A scroll wheel lets you move through your documents or web pages. The pointer looks like an I-bar, and arrow or a pointing hand. D Voice input Today you can also interact with your computer by voice with a voice-recognition system that converts voice into text, so you can dictate text directly onto your word processor or email program. EXERCISES 4.1 Look at A opposite. Which input device would you use for these tasks? 1 to play computer games 2 to copy images from paper into a computer 3 to read price labels in a shop 4.2 Complete each sentence by choosing from the following devices: touch screen, trackball, touchpad, webcam. 1 A _______ is a stationary device that works like a mouse turned upside down. You roll the ball with your hand to move the pointer on the screen. 2 Interactive _______ are used in museums, information centres and Internet Kiosk. You use your finger to point directly to objects on the screen. 4.3 Label the groups of keys with terms from B opposite. Then identify the keys described below. 6 It produces upper-case letters, but it does not affect numbers and symbols. 7 It removes the character to the left of the cursor or any selected text. 4.4 Look at C opposite. Complete these sentences with the correct ‘mouse action’.   1 To start a program or open a document you ____________ on its icon-that is, you rapidly press and release the mouse button twice. 2 If you want to select a menu option, you just ____________ on the left button.

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