Group 1, - *Keyboard*: Used to type text, numbers, and commands. Includes special keys like Enter, Shift, and function keys., - *Mouse*: Used to point, click, drag, and scroll on screen. Optical and wireless versions are most common now., - *Touchscreen*: Lets you tap, swipe, and pinch directly on the display. Used in phones, tablets, and ATMs., - *Microphone*: Captures sound input for voice calls, voice typing, and voice assistants., - *Scanner*: Converts physical documents and photos into digital images., - *Webcam*: Captures video and images for video calls and streaming., - *Joystick / Game Controller*: Used mainly for gaming to control movement and actions., Group 2, - *Monitor*: Displays text, images, and videos on screen. LED and LCD monitors are most common now., - *Printer*: Prints digital data on paper. Inkjet for photos, laser for fast document printing., - *Speaker*: Gives sound output like music, video sound, and system alerts., - *Headphones / Earphones*: Private sound output, used for calls and listening without disturbing others., - *Projector*: Projects the screen onto a large wall or screen, used in classrooms and meetings., Input takes data _in_, output gives data _out_.

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