class 3 chapter 2
📘 Computer Notes – Class 3 💻 What is an Operating System (OS)? An Operating System (OS) is a special software that helps the computer to work. 👉 It controls all parts of the computer. 👉 It helps us to use the computer easily. ✅ Examples of OS: Windows Linux Mac OS 🖥️ Types of Operating System 1. CUI (Character User Interface) We type commands using keyboard No pictures Example: DOS 2. GUI (Graphical User Interface) We use mouse to click on pictures (icons) Easy to use Example: Windows 🪟 Windows Desktop When we start the computer, we see the Desktop . Desktop contains: Wallpaper Icons Taskbar 🎨 Wallpaper Background picture of the desktop We can change it 🧩 Icons Small pictures on desktop Used to open files or programs 📊 Taskbar The taskbar is at the bottom of the screen. Parts of Taskbar: Start...