What is a mouse and what does it ?

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What is a mouse and what does it  ?  

       A computer mouse is a handheld hardware input device that controls a cursor in a GUI and can move and select text, icons, files, and folders. For desktop computers, the mouse is placed on a flat surface such as a mouse pad or a desk and is placed in front of your computer. The picture to the right is an example of a desktop computer mouse with two buttons and a wheel.

• What are the functions of a mouse?
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• Below is a list of each of the computer mouse functions that help a user use their computer and gives you an idea of all of the things a mouse is capable of doing.
• Move the mouse cursor - The primary function is to move the mouse cursor on the screen.
• Open or execute a program - Once you've moved the cursor to an icon, folder, or other object clicking or double clicking that object opens the document or executes the program.
• Select - A mouse also allows you to select text or a file or highlight and select multiple files at once.
• Drag-and-drop - Once something is selected it can also be moved using the drag-and-drop method.
• Hover - Moving the mouse cursor over objects with additional hover information can help discover the function of each object on the screen. For example, hover the mouse over the hover link to see an example.
• Scroll - When working with a long document or viewing a long web page you may need to scroll up or down which can be done using the mouse wheel or clicking and dragging the scroll bar.
• Perform other functions - Many desktop mice also have additional buttons that can be programmed to perform any function. For example, many mice have two side buttons on the thumb portion of the mouse the button closest to the palm can be programmed to go back on web pages.
• How does it work Mouse?
• An optical mouse is a computer mouse which uses a light source, typically a light-emitting diode (LED), and a light detector, such as an array of photo diodes, to detect movement relative to a surface. It is an alternative to the mechanical mouse, which uses moving parts to sense motion.
• A computer mouse enables its user to move a cursor smoothly and intuitively across a two-dimensional plane. It's therefore an essential input device for selecting, dragging, hovering, and clicking. The mouse allows users to switch between applications, select options and buttons, and move around the screen with a great degree of accuracy and fluidity. It is used to move between and select links on a website, buttons on an options screen, entries on a menu, and many more tasks that would be far more difficult using a keyboard alone.