1. Joystick is mainly used for computer gaming.

2. What is Joystick? It is a small device whose primary purpose is to control an appliance. It works as an input device and helps the user navigate in different directions.

3. With the joystick, you can change your device by moving it up, down, left or right. It works according to the input you give and helps you control the device by tilting or rotating it.

1. Optical Mark Reading (OMR) is a method of entering data into a computer system.

2. Optical mark readers read pencil or pen marks made in pre-determined positions on paper forms as answers to questions or tick list signs.

"Urban User Interface" is not a recognized feature of Windows 8. The correct term for the user interface introduced in Windows 8 is the Modern UI or Metro interface, characterized by its tile-based design.

The other features listed—support for ARM processors, support for touch screens, and advanced power management—were indeed features of Windows 8.

1. Booting is a type of start-up sequence that starts the computer's operating system when the system is switched on.

2. This process involves some set of operations, which are performed when the computer is switched on. Knowing the boot sequence is important for optimizing and troubleshooting the computer.

3. It can be initiated by hardware such as a button press, or by software commands.

4. After it is started, there is no software in the main memory of the computer's central processing unit (CPU), so the software must be loaded into memory before it can be executed by some process.