SEBA Class 9 Computer Science Chapter 3 – Office Application (MS Word, MS Excel & MS PowerPoint) Notes PDF

Computer Guide Team
June 14, 2026
SEBA Class 9 Computer Science Chapter 3 – Office Application (MS Word, MS Excel & MS PowerPoint) Notes PDF



SEBA Class 9 Computer Science Chapter 3 – Office Application Notes PDF

Office applications are software programs used to perform various office-related tasks such as creating documents, managing data, preparing presentations, and organizing information. In this chapter, we learn about Microsoft Word, Microsoft Excel, and Microsoft PowerPoint, which are among the most widely used office applications today.

What is a Word Processor?

A word processor is a software application used for creating, editing, formatting, and printing documents. It allows users to make changes easily without rewriting the entire document.

  • Microsoft Word
  • WordStar
  • OpenOffice Writer

Features of a Word Processor

  • Speed: Typing and editing documents is much faster.
  • Editing: Easy correction of mistakes.
  • Formatting: Change font, colour, size, spacing and alignment.
  • Graphics: Insert pictures and illustrations.
  • Storage: Save documents for future use.
  • Built-in Tools: Spell check, grammar check, tables and mail merge.

Applications of Word Processing

Business Use

  • Letters and Letterheads
  • Legal Documents
  • Memos
  • Reference Documents

Educational Use

  • Assignments
  • Class Notes
  • Question Papers
  • Project Reports

Home Use

  • Letter Writing
  • Resume Creation
  • Story Writing
  • Greeting Cards

Introduction to Microsoft Word

Microsoft Word is one of the most popular word-processing software applications. It helps users create professional-looking documents with text, graphics, tables, and formatting features.

Main Components of MS Word Window

  1. Microsoft Office Button
  2. Quick Access Toolbar
  3. Tabs
  4. Title Bar
  5. Groups
  6. Ribbon
  7. Dialog Box Launcher
  8. Status Bar
  9. View Toolbar
  10. Zoom Button

Creating a New Document

  1. Click Microsoft Office Button.
  2. Select New.
  3. Choose Blank Document.
  4. Click Create.

Saving a Document

  1. Click Microsoft Office Button.
  2. Select Save or Save As.
  3. Choose the location.
  4. Enter file name.
  5. Click Save.

Editing Documents

  • Cut: Removes selected text.
  • Copy: Creates a duplicate copy.
  • Paste: Inserts copied or cut text.

Formatting a Document

Formatting improves the appearance and readability of documents.

  • Font Size
  • Font Style
  • Font Colour
  • Bold
  • Italic
  • Underline

Paragraph Formatting

  • Alignment
  • Indentation
  • Line Spacing
  • Paragraph Spacing
  • Bullets and Numbering
  • Borders and Shading

Text Alignment

Alignment Shortcut
Left Ctrl + L
Center Ctrl + E
Right Ctrl + R
Justify Ctrl + J

Working with Shapes and Text Boxes

MS Word allows users to insert text boxes, arrows, stars, flowcharts, and many other shapes to create visually attractive documents.

Working with Images and Clip Art

Images, Clip Art, SmartArt, and Charts can be inserted into documents to make them more attractive and informative.

Format Painter

Format Painter helps copy formatting from one text or object and apply it to another quickly.

Introduction to Microsoft Excel

Microsoft Excel is a spreadsheet application developed by Microsoft. It is used for storing, organizing, calculating, and analyzing data in tabular form.

Features of Microsoft Excel

  • Perform calculations using formulas
  • Store large amounts of data
  • Create charts and graphs
  • Sort and filter data
  • Prepare mark sheets and reports

Components of Excel Window

  • Workbook
  • Worksheet
  • Rows
  • Columns
  • Cell
  • Formula Bar
  • Name Box
  • Status Bar

Workbook and Worksheet

A Workbook is an Excel file that contains one or more worksheets. A Worksheet is a collection of rows and columns used to store data.

Rows and Columns

Rows run horizontally and are identified by numbers such as 1, 2, 3, etc. Columns run vertically and are identified by letters such as A, B, C, etc.

Cell and Cell Address

The intersection of a row and a column is called a cell. Every cell has a unique address such as A1, B5, or C10.

Advantages of Excel

  • Fast calculations
  • Automatic formula processing
  • Easy data management
  • Chart creation
  • Data analysis

Introduction to Microsoft PowerPoint

Microsoft PowerPoint is presentation software used to create slide-based presentations for classrooms, seminars, meetings, and business purposes.

Uses of PowerPoint

  • Classroom presentations
  • Project presentations
  • Business meetings
  • Training programs
  • Seminars and workshops

Components of PowerPoint Window

  • Title Bar
  • Quick Access Toolbar
  • Ribbon
  • Slides Pane
  • Slide Area
  • Status Bar
  • Notes Pane
  • View Buttons

Creating a New Presentation

  1. Open Microsoft PowerPoint.
  2. Click New Presentation.
  3. Select Blank Presentation.
  4. Start creating slides.

Working with Slides

  • Insert New Slide
  • Delete Slide
  • Duplicate Slide
  • Rearrange Slides

Slide Layout

A slide layout determines the arrangement of text, images, charts, and other objects on a slide.

Themes in PowerPoint

Themes are pre-designed combinations of colors, fonts, and effects that improve the appearance of presentations.

Animations and Transitions

Animation

Animation adds movement effects to text, images, and objects within a slide.

Transition

Transition effects are used when moving from one slide to another.

Difference Between Animation and Transition

Animation Transition
Applied to objects Applied to slides
Works inside a slide Works between slides
Adds movement to content Changes slide appearance during navigation

Advantages of PowerPoint

  • Creates attractive presentations
  • Supports multimedia content
  • Easy to explain concepts
  • Professional appearance
  • Useful for teaching and learning

Chapter Summary

  • What is a Word Processor
  • Features of Word Processing
  • Applications of Word Processing
  • Microsoft Word Basics
  • Document Creation and Saving
  • Text and Paragraph Formatting
  • Shapes, Images and Clip Art
  • Format Painter

Frequently Asked Questions (FAQ)

1. What is a Word Processor?

A word processor is software used for creating, editing, formatting and printing documents.

2. Name two examples of Word Processors.

Microsoft Word and OpenOffice Writer.

3. What is the use of Format Painter?

It copies formatting from one object and applies it to another.

4. What is Text Alignment?

Text alignment controls how text is positioned between document margins.

5. What are the four types of text alignment?

Left, Center, Right and Justified Alignment.

📘 Chapter 3 Exercise PDF

Read the complete Chapter 3 MySQL Notes directly on the website.

End of Chapter 3 –Office Application