1. Computer System Examples? Input Output Devices System Unit Devices
slide 1
Computer System
Input
Devices
Output Devices
System Unit
Examples?
Storage Devices

2. slide 2
Primary Input Devices
Keyboard
Mouse

3. slide 3
Uses Of Keyboard
Enter Data
Alphabets
Numbers
Issue Commands

4. slide 4
Keyboards

5. Parts of Keyboard Status Indicators Numeric Keypad Cursor Control Keys
slide 5
Parts of Keyboard
Status
Indicators
Numeric
Keypad
Cursor Control Keys
Standard
Keyboard

6. Standard Keyboard Standard keyboards of different brands look alike.
slide 6
Standard Keyboard
Standard keyboards of different brands look alike.

7. slide 7
Standard Keyboard
Alphabetic Keys are arranged like those on a typewriter.

8. slide 8
Standard Keyboard
Numeric Keys
(Number Row)

9. slide 9
Standard Keyboard

10. Standard Keyboard Tab Caps Lock Advances cursor to the next tab stop
slide 10
Standard Keyboard
Tab
Advances cursor to the next tab stop
Capitalise all the alphabets typed
Not produce the top symbol on keys that contain two symbols, eg, number row
Caps Lock

11. Standard Keyboard Shift
slide 11
Standard Keyboard
Hold down the Shift Key to capitalise the alphabets typed
Produce the top symbol on keys that contain two symbols
Shift

12. slide 12
Standard Keyboard
Backspace Key deletes one character to the left of the cursor.

13. Standard Keyboard Enter Key
slide 13
Standard Keyboard
Enter Key
Advances the insertion point to the next line
Used to execute a command

14. slide 14
Standard Keyboard

15. Standard Keyboard Ctrl Alt
slide 15
Standard Keyboard
Ctrl
Alt
Used in conjunction with another key to expand the functionality of the keyboard
Depends on the software being used

16. slide 16
Standard Keyboard

17. Standard Keyboard Esc Function Keys Cancels an operation
slide 17
Standard Keyboard
Esc
Cancels an operation
Function Keys
Are numbered and assigned different functions in different software packages
Can save keystrokes

18. Numeric Keypad Numbers can be keyed in by use of
slide 18
Numeric Keypad
Numbers can be keyed in by use of
Numeric Row of Standard Keyboard
Numeric Keypad

19. slide 19
Numeric Keypad
Permits rapid numeric data entry

20. Numeric Keypad If a key has two symbols, it serves two functions:
slide 20
Numeric Keypad
If a key has two symbols, it serves two functions:
(1) numeric key
(2) cursor control key
Switch between 2 functions by use of Num Lock key

21. slide 21
Numeric Keypad
When Num Lock is pressed, the numeric keypad is in numeric mode and produces numbers.
Num Lock light is on.

22. slide 22
Numeric Keypad
When Num Lock is pressed again, the numeric keypad turns to cursor control mode and moves the cursor in the direction indicated by the arrows.
Num Lock light is off.

23. Toggle Keys Switches back and forth between two modes
slide 23
Toggle Keys
Switches back and forth between two modes
Num Lock, Cap Lock and Scroll Lock

24. slide 24
Toggle Keys - Cap Lock
Switches between uppercase mode and lowercase mode
When Cap Lock is pressed, user toggles into uppercase mode.
When Cap Lock is pressed again, user toggles back into lowercase mode.

25. Toggle Keys - Scroll Lock
slide 25
Toggle Keys - Scroll Lock
The function of the Scroll Lock key depends on the software being used.
It is rarely used with today’s software.

26. slide 26
Status Indicators
Status Indicators show the status of each toggle key: Num Lock, Caps Lock and Scroll Lock.

27. slide 27
Status Indicators
Scroll Lock
Num Lock
Caps Lock

28. slide 28
Cursor Control Keys
(2)
(1)

29. Cursor Control Keys 2 sets of Cursor Control Keys:
slide 29
Cursor Control Keys
2 sets of Cursor Control Keys:
(1) Located between Standard Keyboard and Numeric Keypad
(2) When the Numeric Keypad is in cursor control mode

30. slide 30
Cursor Control Keys
Arrow Keys

31. Cursor Control Keys Arrow Keys Delete Key Select options from a menu
slide 31
Cursor Control Keys
Arrow Keys
Select options from a menu
Move cursor up, down, left and right
Delete Key
Deletes the character at the cursor position

32. Cursor Control Keys Insert Key A toggle key
slide 32
Cursor Control Keys
Insert Key
A toggle key
Switches between insert mode and typeover mode
Insert mode allows additional text to be inserted.
Typeover mode makes the new text type over the existing text.

33. Cursor Control Keys Home Key End Key
slide 33
Home Key
Moves cursor to the beginning of a line or the beginning of a document, depending on the software being used.
End Key
Moves cursor to the end of the line or the end of a document, depending on the software being used.

34. Cursor Control Keys Page Up Key Page Down Key
slide 34
Cursor Control Keys
Page Up Key
Displays the previous screen of information
Page Down Key
Displays the next screen of information

35. slide 35
Other Keys

36. Other Keys Print Screen Key Pause Key
slide 36
Other Keys
Print Screen Key
Prints what is currently being displayed on the screen
Pause Key
Temporarily suspend the current task

37. Keyboard Provides three basic ways for issuing commands:
slide 37
Keyboard
Provides three basic ways for issuing commands:
(1) Key in the command using the alphanumeric portion of the keyboard
(2) Tap a function key
(3) Use the arrow keys to select a menu option from the displayed menu

38. slide 38
Keyboard Skills
In order to use the keyboard efficiently, users are encouraged to develop their Keyboard Skills.