COMPUTER HARDWARE
Semester-1
Unit-1
B.Voc Hardware and Networking
PPT-1
What is Computer Hardware?
⚫ Computer hardware is the collection of
physical parts of a computer system.
⚫ This includes the computer case, monitor,
keyboard, mouse, printer, scanner, etc .
⚫ It also includes all the parts inside the
computer case, such as the hard disk
drive, motherboard, video card, and many
others.
⚫ Computer hardware is what you can
physically touch.
Peripheral devices
⚫ Device that is connected to a computer
but is not part of the core computer
architecture.
⚫ connects to a computer system to add
functionality. Examples are a mouse,
keyboard, monitor and printer.
⚫ Peripheral devices can be external or
internal and can provide either an input
or an output.
Keyboard
⚫ It is an input device.
⚫ Used to enter text , similar to typewriter.
⚫ Typical keyboard have 104 keys.
⚫ Keyboard is divided into:
Numeric keys: 0 to 9,+,-,/,%
Character/alphanumeric keys: a-z, A-Z. 0-9
Punctuation: : ; ? ‘ “
Function keys: F1 to F12
Special purpose keys: del, page up, page
down, end, home, insert, ctrl, alt, etc.
Cursor movement keys: arrow keys (up,
down, right, left)
Types of Keyboard
Multimedia Keyboard:
⚫ Design to make it one-touch simple for
the user to access often used programs.
⚫ Contain keys to perform: volume control,
internet explorer, changing songs,
opening email, back, forward, refresh etc.
⚫ Special type of keyboard called gaming
keyboard is used for playing games.
⚫ Can have PS/2 port, USB port or can be
wireless.
Ergonomic Keyboard:
⚫ This keyboard is mainly designed for users who
use both hands for typing.
⚫ The advantage of this keyboard is less muscle
strain, when you have to work for long time.
⚫ This makes you rest your hands in a more
comfortable, natural position as you type.
⚫ This keyboard is expensive.
Wireless Keyboard:
⚫ Costlier than wired keyboards.
⚫ Do not have any wire attached to
them.
⚫ Interact with computer through
Bluetooth or infrared rays.
⚫ Operates on battery power.
⚫ Offers more mobility, can operate
sitting anywhere within the range.
Mechanical keyboard:
⚫ It is the traditional keyboard.
⚫ It makes noise when each key is pressed.
⚫ Have longer life span than other
keyboards.
⚫ Allow removal and replacement of
keycaps.
