What is a computer?
A computer is an electronic device that manipulates information, or data.
The system Unit
It is called a Computer System:
As it is not a single machine but a collection of many devices which work together to perform a task.
Peoples are the computer operators,
also known as users.
What is hardware?
Computer hardware refers to the physical parts
or components of a computer
All of which are physical objects that can be touched
What is Peripheral?
(External parts of computer)
A peripheral is the general term used to describe devices which are externally
connected to a computer.
used to interact with or send data to the computer
e.g. mouse, keyboards, etc…
which provides output to the user from the computer
e.g. monitors, printers, etc…
which stores data processed by the computer
e.g. Hard drives, flash drives, etc…
What you put into a computer (input) controls what you get out of it (output).
The equipment which you use to put information (called data) into a computer is called input devices.
The equipment we use to get out of the computer is called output devices.
A. Input and Output devices
1.Here are some input devices. Write the missing letters.
(1) k __ __ __ __ __ __ d (2) j __ __ s __ __ __ k
(3) __ __ u __ e (4) s __ __ n n __ r
2. Here are some output devices. Write the missing letters.
(1) l a s __ __ P __ __ n __ __ r (2) __ __ n __ t __ __
(3) S p __ __ k __ __ __ (4) p __ __ t __ e __
4. Sort these devices into the correct column.
Scanner, Printer, Keyboard, Mouse, Monitor, Joystick, Speaker, Projector, Dongles and modems
Digital camera, Microphone, Barcode reader, Webcam, Game controller, USB flash drives, Plotter,
Input Devices Output Devices I/O Devices Storage Devices Network Devices
B. Storage devices
Draw lines to match the different secondary storage
devices to the read/write equipment.
What is software?
Software is a Set of Instructions that makes the computer perform
tasks. In other words we can say that, software tells the computer what to do.
Will learn more about software on the 3rd day……..
1. What is a computer?
2. How the data stored or how the computer sees the data?
3. What is hardware?
4. Give some Examples for internal components of a computer?
5. Give some examples for external parts of computer?
6. What is software?
7. What are the main types of PC?
8. Give some examples for the companies that makes PC?
9. What is a server?
What is data?
DATA is a collection of independent and Unorganized
Types of Data
What is information?
Information is the processed and Organized data presented in a
Information Processing Cycle
PROCESSING SYSTEMDATA INFORMATION
A computer Primary job is to process these tiny pieces of Data
in various ways, Converting them into useful Information
Test scores achieved by students
Average test score is 67%.
This shows that the first
student’s mark is way below
Data is raw, unorganized facts that need to be
processed. Data can be something simple and
seemingly random and useless until it is organized.
When data is processed, organized,
structured or presented in a given context so
as to make it useful, it is called Information.
Example Each student's test score is one piece of data
The class' average score or the school's
average score is the information that can be
concluded from the given data.
Functions of an Information
1. It accepts and gather data (INPUT)
2. It processes data to become information (PROCESSING)
3. It stores data and information (STORE)
4. It presents information (OUTPUT)
Any information or data that's Entered or sent to the computer to be
Processed is considered Input.
What is output?
Any information that has been processed and comes from a
Computer or computer device is considered output.
A computer designed for use by one person at a time.
Lap top Computer
What are the different types of PCs?
40Designed so All of the Components fit on or under a Desk or Table
What is Laptop computer?
A computer that is portable small enough to fit on your
lap and suitable for use while travelling.
What are the Main types of software?
What is system software?
Operating System (OS)
is a set of programs
that coordinates all
devices and allows
users to run
Utility Programs allow the user to
perform maintenance-type tasks
usually related to managing a
computer, its devices or its programs
Programs that control the operations of the computer and its devices
What is application software?
Programs that perform specific tasks for users