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1. HARDWARE & ITS TYPES

2. What Is Hardware?
A hardware is the physical touchable parts of a system.
The hardware makes the main structural unit of the
system.
The hardware is mainly classified into the followings:
IV. Communication
III. Storage
II. Input/output Devices
I. System Unit

3. I. SYSTEM UNIT
❖ The system unit is a containerthat houses most of
the electroniccomponents that makeupa computer
system.
➢It is the permanent memory of the computer.
➢It is the main storage memory of the computer system.
II. ROM- Read-only-memory
➢It is also the temporary memory of the system.
➢It holds the program and data that is currently being processed.
I. RAM- Random-access-memory
❖The memory is divided into two types:
❖ Memory is a holding area for data, instructions,
and information.
❖ The microprocessorcontrols and manipulates
data to produce information.
❖ Two important components of the
system unitare the microprocessor
and the memory.

4. II. INPUT & OUTPUT DEVICES
I. INPUT DEVICES-
➢The most common input devicesare keyboard & mouse.
➢Thesedevices translatedata & programs that humans can understand into
a form that computer can process.

5. II. INPUT & OUTPUT DEVICES
II. OUTPUTDEVICES-
➢The most common outputdevices are monitor, printer& speakers.
➢ Thesedevicestranslatethe processed information from the computer
into a form that human can understand.

6. III. STORAGE
➢ Storageorsecondary storageholdsdata & programseven after
electrical power to the computersystem has been turned off.
➢The most important kind of secondary mediaare hard disks, solid-statestorage
& optical disks.

7. HARD DISKS
➢Hard disks are typically used to store programs & very
large data files.
➢Using rigid metallic platters & red/write heads that move
across the platters, data & information is stored using magnetic
charges of the disk’s surface

8. SOLID-STATE STORAGE
➢Solid –state storage does not have any moving parts, is more reliable&
requires less power.
1. FLASH MEMORY CARD 2. USB DRIVE
➢It has two types :
➢It saves data & information electronicallysimilarto RAM except that
it not volatile.

9. OPTICAL DISC
➢These discs use laser technology & have the greatest
capacity.
1. Compactdiscs
(CDs)
2. Digital versatilediscs
(DVDs)
3. High-definitiondiscs
(hi defs)
➢Three types of optical discs are:

10. IV. COMMUNICATION
➢Using communication devices,a micro computer can communicatewith other
computer systems located anywherein the world using internet.
➢A modem also modifiescomputer outputs into a form that can be
transmitted across standard telephone lines.
➢The most widelyused communicationdeviceis a modem, which modifies
telephonecommunication into a form that can be processed by a computer.