Std 3 Computer – Chapter 1

📘 Std 3 – Computer

💻 Chapter 1: Hardware & Software

🔹 What is a Computer?

A computer is an electronic machine that takes input, processes data, and gives output.

🔹 Hardware

Hardware means all the physical parts of a computer that we can see and touch.

  • Keyboard
  • Mouse
  • Monitor
  • CPU
  • Printer
  • Speakers

📂 Types of Hardware

1️⃣ Input Devices

  • Keyboard – typing
  • Mouse – pointing
  • Microphone – recording sound
  • Scanner – scanning documents

2️⃣ Processing Device

CPU is the brain of the computer.

  • CU (Control Unit)
  • ALU (Arithmetic Logic Unit)
  • MU (Memory Unit)

3️⃣ Output Devices

  • Monitor – display
  • Printer – print
  • Speakers – sound
  • Headphones

4️⃣ Storage Devices

  • Hard Disk
  • Pen Drive
  • Memory Card
  • Cloud Storage

🔹 Software

Software is a set of instructions or programs given to the computer.

  • MS Word
  • Paint
  • PowerPoint

🔹 Types of Software

1️⃣ System Software

Controls the computer. Example: Windows

2️⃣ Application Software

Helps us do specific work.

  • Word – typing
  • Paint – drawing
  • Excel – calculations
  • PowerPoint – presentation

🔗 Relationship Between Hardware & Software

Both depend on each other.
Without hardware, software cannot run.
Without software, hardware cannot work.

🧠 Quick Revision

  • Computer = Hardware + Software
  • Hardware = Physical parts
  • Software = Programs
  • CPU = Brain of computer

✏️ Important Questions

Q1. What is hardware?
👉 Hardware is the physical parts of a computer.

Q2. Name two input devices.
👉 Keyboard, Mouse

Q3. What is software?
👉 Software is a set of instructions given to a computer.

Q4. What is CPU?
👉 CPU is the brain of the computer.

Q5. Name types of software.
👉 System software and Application software

© frenz.in | Computer Notes for Students

📘 Std 3 Computer

💻 Chapter 1: Hardware and Software

🧠 A. Fill in the blanks

  1. Multimedia software is used to create videos, animations, graphics, and edit text.
  2. A printed copy is called a Hard copy.
  3. An Operating system acts as an interface between the user and the computer hardware.
  4. Adobe Photoshop is an example of Image editing software.

✅ B. State True or False

  • A hard disk is the main secondary storage device. ✔
  • An application software is used to do a specific type of work. ✔
  • A spreadsheet program is used to create videos. ❌
  • CU stores the data and instructions that are to be processed. ❌

🎯 C. Select the correct option

  • The physical parts of a computer are called → Hardware
  • Most popular operating system by Microsoft → Windows
  • Used to transfer data → Pen drive
  • Example of presentation software → PowerPoint

🔗 D. Competency-based Questions

  1. Ashi and Anubhav need to create a presentation → Presentation software
  2. Piya wants to scan documents → Scanner

📝 E. Answer the following questions

1. Name the parts of the CPU
CU (Control Unit), ALU (Arithmetic Logic Unit), MU (Memory Unit)

2. Define system software
System software is a set of programs that controls the overall working of a computer.

3. What is an operating system?
An operating system makes hardware and software work together.

4. Differentiate between hardware and software
Hardware: Physical parts that can be seen and touched
Software: Programs or instructions given to the computer

🎮 Activity Answers

Hardware:

  • CPU
  • Monitor
  • Printer
  • Mouse
  • Keyboard

Software:

  • PowerPoint
  • Excel
  • Word
  • Adobe Photoshop
  • VLC Media Player

Categorise Software:

  • WordPad → Word Processing
  • OpenOffice Calc → Spreadsheet
  • Excel → Spreadsheet
  • PowerPoint → Presentation
  • Word → Word Processing
  • OpenOffice Writer → Word Processing