THE KEYBOARD.. Task 7. Match these key abbreviations with their full names.. THE MOUSE

THE KEYBOARD.

The keys on a computer keyboard can be arranged in many different ways. The most common way on a desktop PC is called an extended keyboard. The diagram shows an extended keyboard. The keys are in four main sections.

The section known as the main keyboard has a key for each letter of the alphabet. It also has keys for the digits 0 to 9, punctuations marks like commas and full stops, and other common symbols.

Above the main keyboard is a row of keys known as the functions keys. This section includes the Escape key to the left and the Print Screen, Scroll Lock, and Break keys to the right. The function keys labeled F1 to F12 don’t have fixed functions. You can program them to perform different such as saving and printing.To the right of the main keyboard is a section known as the editing keys. This group includes keys which insert and delete data. It also includes the cursor keys, also called the arrow keys. These keys move the cursor around the screen.

To the far right of the main keyboard is the numeric keypad. This section has keys for the digits 0 to 9 and for the common mathematical symbols like plus and minus. The keys are arranged like the keys on an electronic calculator. You use these keys to input numerical data.

Task 7. Match these key abbreviations with their full names.

	Esc	aAlternative
2Alt		bPage Up
	Ctrl	cDelete
4Pgdn		dInsert
	Pgup	eEscape
	Ins	fPage Down
	Del	gControl

THE MOUSE

The computer mouse is a hand-operateddevice that lets you control more easily the location of the pointer on your screen. You can make selections and choices with the mouse button.

The mouse contains a rubber-coatedball that rests on the surface of your working area or a mousemat. When the mouse is moved over that surface, the ball rolls.

The ball’s movements up and down, and left and right, turn the two axels inside the mouse. As they turn, detectors register the changing position. A small integrated circuit inside the mouse sends signals to the operating system, which instructs it to move the pointer on your screen.

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