COMPUTER HARDWARE - CLASSIFICATION OF HARDWARE - SYSTEM UNIT - PERIPHERALS - INPUT- OUTPUT - STORAGE DEVICES (SS1 NOTES)

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 COMPUTER HARDWARE - 

CLASSIFICATION OF HARDWARE 

SYSTEM UNIT - PERIPHERALS - INPUT- OUTPUT - STORAGE DEVICES

Meaning of Computer Hardware

These are the physical components of the computer system. They are the tangible parts that can be seen and touched. There are two major parts, namely:
a. The system unit 
b. The peripherals
     c.  Input Devices
     d. Output Devices
     e. Storage Devices
a. The System unit: The system unit is the rectangular casing that houses (contains) several important components that controls the operation of the computer system such as the motherboard, CPU (Microprocessor), RAM, Sound card, video card, CD drive, Floppy disk drive etc. It also provides interface for connection of the peripherals.

b. Peripherals: These are the devices connected to the system unit for the purpose of input, output and storage operations. Examples of peripheral devices are keyboard, Mouse, Monitor, Printer, Scanner, DVD, CD, USB flash drive etc.
c. Input Devices : These are used to provide data and control signals to an information processing system, such as a computer or information appliance. Examples of input devices include keyboards, mouse, scanners, cameras, joysticks, and microphones.
d. Output Devices :-  These are hardware devices which give out the result of the entered input, once it is processed (i.e. converts data from machine language to a human-understandable language), is called an output device. For example printer, monitor, etc.
e. Storage Devices: - These can be used to store digital data and applications which may be in the form of images, video, audio, etc. is called a storage device. Examples are: Hard Drive Disks, Floppy Disks, Tapes,Compact Discs (CDs), DVD and Blu-ray Discs, USB Flash Drives,Secure Digital Cards (SD Card)s, Solid-State Drives (SSDs), Cloud Storage, Punch Cards

Class Activities
1. Define Computer hardware,
2. Explain each of the following hardware classifications and list three (3) examples for each:
(a) Peripherals
(b) Input devices
(c) Output devices
(d) Storage device

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