At the end of the lesson, the learners should be able to: A. Identify the basic set of devices found in most personal computer. B. Describe the function of each devices. C. Participate actively of the given activities.

2. Hardware – Physical, touchable,
electronic and mechanical parts of a
computer.
The main part of a
microcomputer, sometimes
called chassis.
System unit1.

3. 2. Motherboard
It contains all the circuits and
components that run the
computer.
The motherboard is an important computer component because
it's what everything else connects to! A motherboard has ports
that face outside a PC's case, so you can charge your computer,
plug in a monitor, or connect a mouse.

4. CPU (Central
Processing Unit)
It is the main “brain or heart”
of a computer system.
3.

5. 4.
There are two types of Memory
a. ROM – (Read Only Memory) is non-volatile, meaning it holds
data even when the power is ON or OFF.
b. RAM – (Random Access Memory) is volatile, meaning it holds
data only when the power is on. When the power is off, RAM's
contents are lost.
Primary Storage
It is the computer’s working storage space that
holds data, instructions for processing and
processed data(information) waiting to be sent to
secondary storage.

6. RAM ROM

7. 5.
6.
Expansion Bus
A bus is a data pathway between several hardware components
inside or outside a computer.
Adapters
A printed-circuit boards (also called interface cards) that enable the
computer to use a peripheral device for which it does not have the
necessary connections or circuit boards.

8. 7.
8.
Power Supply
Unit
Installed in the back corner of the PC case, next to the
motherboard. It converts 120vac (standard house power) into Dc
voltages that are used by other components in the PC.
Hard Disk Drive
Is a magnetic storage device that is
installed inside the computer. The
hard drive is used as permanent
storage for data.

9. 9.
10.
Optical Drive
An optical drive is a storage device
that uses lasers to read data on the
optical media.
Digital Versatile
Disc
Designed to optically access data
stored on a DVD. A laser moves back
and forth near the disk surface and
accesses data at a very fast rate.

11. Warning
Static Electricity can Destroy
Computer Components

13. ASSIGNMENT:
List down the input and output devices of a
computer and study its function. Place your
answer on one fourth sheet of paper. Be able to
pass it next meeting.