Here are some CBSE Class 4 Computer Science notes related to NCERT textbooks:

1. Chapter 1: Basics of Computers
- Introduction to computers
- Parts of a computer system
- Input and output devices
- Software and types of software
- Application software and system software

2. Chapter 2: Computer Memory
- Introduction to computer memory
- Primary and secondary memory
- Types of secondary memory
- Storage devices: hard disk, CD/DVD, pen drive, memory card, etc.
- Memory units: bit, byte, kilobyte, megabyte, gigabyte, etc.

3. Chapter 3: Introduction to Windows
- Introduction to Windows operating system
- Desktop, taskbar, and start menu
- Windows accessories: Paint, Notepad, WordPad, Calculator, etc.
- Files and folders: creating, renaming, copying, and deleting
- Using Windows Explorer to navigate and manage files

4. Chapter 4: Microsoft Word
- Introduction to Microsoft Word
- Creating a new document
- Formatting text: font, size, style, color, etc.
- Editing and proofreading tools: spell check, grammar check, etc.
- Saving and printing documents

5. Chapter 5: Microsoft PowerPoint
- Introduction to Microsoft PowerPoint
- Creating a new presentation
- Adding and formatting slides
- Inserting text, images, and shapes
- Applying transitions and animations

6. Chapter 6: Introduction to the Internet
- Introduction to the internet
- Web browsers: Internet Explorer, Google Chrome, Mozilla Firefox, etc.
- Searching the internet using search engines
- Websites and web addresses
- Internet safety and responsible internet usage

These notes cover the basics of computer science for Class 4 students as per the CBSE syllabus and are related to the NCERT textbooks used in the curriculum. They provide a comprehensive understanding of the topics and can be used for reference and revision purposes.