course 1: Input Devices

Input Devices
Using Keyboard Shortcut:
Keyboard shortcuts are ways to perform actions by using your keyboard. They re called shortcuts because they help you work faster. In fact, almost any action or command you can perform with a mouse can be performed faster using one or more keys on your keyboard.
A plus sign (+) between two or more keys indicates that those keys should be pressed in combination. For example, Ctrl+A means to press and hold Ctrl and then press A. Ctrl+Shift+A means to press and hold Ctrl and Shift and then press A.
You can do things in most programs by using the keyboard. To see which commands have keyboard shortcuts, open a menu.
Change keyboard settings
Customizing your keyboard settings helps you work better and more efficiently. By customizing the settings, you can determine how long you must press a key before the keyboard character starts repeating, the speed at which keyboard characters repeat, and the rate at which the cursor blinks.

Mouse
A mouse is a small two-dimensional pointing device used to point to and select items on your computer screen. It s small, and connected to the system unit by a long wire. Some newer mice are wireless.
You can use your mouse to interact with items on your computer screen, move objects, open them, change them, throw them away, and perform other actions, all by pointing and clicking with your mouse. Since the keyboard is likely to remain the dominateالمهيمن والمسيطر device for entering text, but many operations on personal computers involve pointing, selecting or removing items already on the screen, often you can perform these tasks more quickly with pointing devices, such as the touch screen and the mouse. The mouse is connected to one of the available ports : Previously a PS/2 port, serial ports, or now USB port (Universal Serial Bus).
The function of a mouse is to convert a small movement of the mouse into digital signals, which may be interpreted into corresponding movement at pointer on the screen.