COMPUTER KEYBOARD
BY: CONNIE S. LOPICO
EDUCATION PROGRAM SPECIALIST II -ALS
OBJECTIVES
• After the lesson, the learner will be able to identify
the different types of the computer keyboard, its
parts, lay-out and uses.
COMPUTER KEYBOARD
• The most common PC input device is the keyboard. This type
of device translates keystrokes into letters or numbers. The
letters are then interpreted and commands are performed,
depending on what is being sent.
• A keyboard is an input device that contains keys users press to
enter data and instructions into a computer
COMPUTER KEYBOARD
• A computer keyboard contains keys you press to
enter data into the computer. For security purposes,
some keyboards include a fingerprint reader, which
allows you to work with the computer only if your
fingerprint is recognized.
HISTORY OF KEYBOARD
Christopher Latham Sholes was the inventor of the
keyboard for computing devices.
He patented the typewriter that we commonly use
today in 1868.
TYPES OF KEYBOARDS
Keyboards have changed very little in layout since their introduction. In fact, the
most common change has simply been the natural evolution of adding more keys
that provide additional functionality.
The most common keyboards are:
101-key Enhanced keyboard
104-key Windows keyboard
82-key Apple standard keyboard
108-key Apple Extended keyboard
• Portable computers such as laptops quite often have custom keyboards that have
slightly different key arrangements than a standard keyboard. Also, many system
manufacturers add specialty buttons to the standard layout.
KIND OF KEYBOARDS
Standard Keyboard
also known as the Desktop Keyboard include alphabetic characters,
punctuation symbols, numbers and a variety of function keys.
Laptop Keyboards
has the same keyboard type as a normal keyboard,
except for the fact that most laptop keyboards
condense the symbols into fewer buttons to
accommodate less space.
Gaming Keyboards
are similar to normal keyboards except they generally contain
extra features such as illuminated keys, multimedia keys, an
additional LCD screen, palm rest and other features.
Ergonomic Keyboards
is a computer keyboard designed with ergonomic considerations
to minimize the chance of wrist and hand injuries.
Laser or Infrared Keyboards
this device projects the keyboard on to a flat surface, such as a
table or desk.
Rollup Keyboards
are made of soft plastic or silicone which can be rolled on itself
for travel.
CONNECTION TYPES
A. Wired Keyboards
1. PS/2 Keyboard
2. USB
CONNECTION TYPES
B. Wireless Keyboards
• Bluetooth
• Infrared (IR) –
Virtual Keyboard (uses an infrared and laser technology
• Radio Frequency
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
1. MAIN KEYPAD
5. NAVIGATION KEYS
2. FUNCTIONS KEYS
6. NUMERIC KEYPAD
3. MODIFIER KEYS
7. INDICATOR LIGHTS
4. LEGACY KEYS
8. WINDOWS AND
MENU KEY
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Main Keypad
is the primary portion of the keyboard that contains all
alphanumeric, symbol keys such as percent sign, dollar sign,
punctuations, etc. Also the tab (used to insert the cursor),
Capslock keys, enter and backspace key are present.
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Main Keypad
They do not represent printing characters but used for displaying
control, data structuring, and transmission control depend on the
software currently use.
Tab – Allows the cursor to jump five spaces forward
Caps Lock - a key that, when activated, causes all alphabetic characters
Space Bar - Used to give spaces between the words.
Backspace key– Used to delete any character before the current position of the cursor.
Enter Key – Used to enter commands or to move the cursor to the beginning of the next line.
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Function Keys
- Across the top of a keyboard are a row of keys called the Function Keys.
- Each key is composed of the letter F and a number, ranging from F1 to F12.
- Each of the Function Keys performs a specific operation based upon what software is
being used.
- They are used to perform special functions.
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Modifier Keys
- They are designed to be held down in conjunction with other keys to accomplish
specific functions. The shift key is used to change the capitalization of a main key. The
same goes for the Alt and Ctrl keys is used to change the function of other pressed
keys.
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Modifier Keys
- They are designed to be held down in conjunction with other keys to accomplish
specific functions. The shift key is used to change the capitalization of a main key. The
same goes for the Alt and Ctrl keys is used to change the function of other pressed
keys.
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Legacy Keys
- They are designed to be held down in conjunction with other keys to accomplish
specific functions. Esc normally used to interrupt or cancel an activity.
- Print screen the key either sends the current screen image to the computer
clipboard.
- The Scroll lock key is intended to temporarily stop the scrolling of text or halt the
operation of a program.
- Pause/Break key it can be used by software to switch between multiple login
sessions, to terminate a program or stop state.
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Navigation Keys
- These include the cursor keys, which have four arrows.
- These arrows move the cursor one space in the indicated direction.
- Above these keys are a block of six keys that includes:
1. Insert which allows text to be inserted
2. Delete keys refers to removing a file,
3. Home key is often used to return the user to the beginning of
the line
4. End key which move to line end
5. Page Up – used to move the user upward of the line
6. Page Down – used to move the user downward of the line
- The Navigation Keys, also called the Direction Keys, are used to
navigate through documents and websites.
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Numeric Keys
- The keys marked with numbers from 0 to 9 are called Number
Keys.
- Also contain decimal point arranged as on an adding machine,
arithmetic operations and enter key.
- Numeric keypads make it easier to enter large amounts of
numeric data.
- Many larger keyboards have an extra section to the right that
contains the Numeric
- Keypad.
- This consists of the numbers 1 through 9, an asterisk, a slash, a
dash, a plus sign, an enter key and a period.
- There is also is a "Num Lock" key, which is used to turn on and off
the Numeric Keypad.
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Indicator Lights
Used to control LED of the NumLock, Caps Lock, and Scroll Lock
indicator lights on the keyboard which can be state of being always on,
always off or flash.
PARTS AND LAY-OUT OF THE STANDARD KEYBOARD
Windows and Menu Key
- The window key opens, the start menu of windows operating system.
- The menu key, opens a pop-up menu that often the user additional commands.
I. Enumerate the 8 parts of a typical computer keyboard.
II. Answer the following. The keys on a computer keyboard are laid out in
group. Tell in which group the following keys belong, base on your
answer above.
_________1. Equal Key _________6. Caps Lock Key
_________2. Esc Key
_________7. Left Arrow Key
_________3. Crtl Key
_________8. 9 Key
_________4. F8 Key
_________9. Space bar Key
_________5.Enter Key
_________10. Del Key