Introduction to Computer (Class 4)
1)What is a computer?
A computer is an electronic machine which can do
various jobs.
2)What are the parts of a computer?
Monitor:
A monitor looks like a TV which displays images and text on the computer
screen.
Mouse: It
is used to select items and draw pictures.
CPU: It is the brain of the computer. It gets
data from the user processes it and gives the result.
Keyboard: It is used to type letters, numbers
and symbols.
Printer: It is used to take printout on the
paper.
Speaker: It is used to listen music and hear
audio output.
3) What is an input device?
An input device is used to enter data into a
computer.
Example: Keyboard, Mouse, Microphone, Joystick
4)What is an output device?
An output
device shows the result of what we do on a computer.
Example:
Monitor and Printer, Speaker
5)What is a storage device?
A storage device is used to save data in a
computer.
Example:
Hard Disk, Pen Drive, CD and DVD
About Windows
1.What is Windows?
Windows is an operating system that helps us to
use the computer.
Example. Windows 10, Windows 11
2.What is a desktop in Windows?
The desktop is the main screen of the computer
where we see icons and the taskbar.
3.What are icons?
Small
pictures on the Desktop are called Icons.
4.What is a Taskbar?
The Taskbar is the bar at the bottom of the
screen where we see open apps.
5.What does the Recycle Bin do?
The
Recycle Bin stores deleted files until they are permanently removed.
6.What are wallpapers in Windows?
Wallpapers are background pictures on the
desktop.
7.How can we change the wallpaper?
Right-click on the desktop → Click
"Personalize" → Choose a new wallpaper.
8.What is a cursor?
A cursor is the small arrow that moves when we
use the mouse.
Generations of Computers
|
Generation |
Technology Used |
|
First Generation |
Vacuum
Tubes |
|
Second
Generation |
Transistors |
|
Third
Generation |
Integrated
Circuits |
|
Fourth
Generation |
Microprocessors |
|
Fifth
Generation |
Artificial
Intelligence |
MS Office
1.Microsoft Office is a software which was
developed by Microsoft in 1988.It has various applications.
2.Main applications are
• Microsoft
Word- It is used to type letters, numbers, and notes,
• Microsoft
PowerPoint- It is used to make slideshows with pictures, text, and animations.
• MS Excel is used to make tables, timetables and create charts.
Keyboard Shortcuts
- Ctrl + N → Open a new document
- Ctrl + C → Copy the text
- Ctrl + V → Paste the text
- Ctrl + X → Cut the text
- Ctrl + Z → Undo (Go back one step)
- Ctrl + Y → Redo (Bring back)
- Ctrl + S → Save your work
- Ctrl + P → Print a document
- Ctrl + A → Select all text or pictures
- Ctrl + B → Make text bold
- Ctrl + I → Make text italic
- Ctrl + U → Underline text
Basic Computer Full forms
- CPU – Central Processing Unit (Brain of the Computer)
- CD -Compact Disc (Storage Device)
- DVD -Digital Video Disc (Storage Device)
- HDD – Hard Disk Drive (Stores data)
- WWW – World Wide Web (A collection of websites)
- LAN – Local Area Network (Covers one building or a small area –Home, School Wi-Fi)
- MAN - Metropolitan Area Network (Covers a city or a big area – Cable TV Connection)
- WAN – Wide Area Network (Covers Very Large (Worldwide)- Internet)
- Wi-Fi – Wireless Fidelity (Wireless internet connection)
- PC – Personal Computer (A computer used at home or school)
- OS – Operating System (Manages the computer)
- IT – Information Technology (Using computers to store and share information)
- AI – Artificial Intelligence (Smart computers that think like humans)
