Keyboarding and Mouse Usage

• Keyboarding and mouse usage are fundamental computer skills.

Keyboards

• The keyboard is the most common input device.
• Keyboarding skill refers to the ability to smoothly input information via a keyboard while typing.
• A keyboard controller detects when a key is pressed.
• The controller then sends a code representing the pressed key to the CPU.
• The controller notifies the operating system about the key press, and the OS responds.
• If a key is held down, the controller repeats the letter.
• F1 is the help key and opens the help screen in almost every program.
• F2 is the rename key, used for renaming files or folders.
• F3 is the search key, used for finding files and folders on the computer.
• F4 is the close key.
• F5 is the refresh key.
• F6 is the address bar key.
• F7 is the spell checker key.
• F8 is the safe mode key.

Mouse

• Nearly all modern computers include a mouse of some kind.
• It allows users to select objects on the screen.
• The mouse moves a pointer on the screen.
• Actions include pointing to an object and selecting by clicking.
• Clicking and holding allows you to drag an object.
• Releasing the mouse button is a "drop".
• Right-clicking typically opens a shortcut menu.
• Modern mice often include a scroll wheel for easy navigation.
• There are four basic mouse actions: left click, double click, right-click, and drag-and-drop.
• The pointer can be positioned quickly.
• Interacting with menus is made easy.
• Users can draw electronically.

Mechanical Mouse

• Uses a rubber ball to determine direction and speed.
• Regular cleaning of the ball is often necessary.

Optical Mouse

• Optical mice shine a light on the mouse pad.
• Speed and direction are determined by the reflection.
• Optical mice need very little maintenance.

Mouse Button Configuration

• Mouse button configurations are generally set for right-handed users.

Mouse Variants

• Trackballs involve an upside-down mouse.
• The hand rests on the ball of the trackball, which the user moves.
• Trackballs require little desk space.
• Trackpads are stationary pointing devices.
• They consist of a small plastic rectangle.
• The finger moves across the pad, and the pointer mimics this movement.
• Trackpads are common on laptops.
• Trackpoints feature a small joystick integrated into the keyboard.
• The pointer is controlled by moving the joystick.

Ergonomics

• Ergonomics studies the interaction between humans and their tools, including computers.
• It focuses on physical interaction to improve safety and comfort.
• Repetitive Strain Injury (RSI) is caused by continuous misuse of the body.
• Many professions are affected by RSI.
• Carpal Tunnel Syndrome involves the carpal tunnel, a passage located in the wrist through which nerves and tendons pass.
• Prolonged keyboarding can cause tendons to swell.

Office Ergonomics

• Office chairs should have adjustable armrests and height, armrests, and lower back support.
• Desks should include a keyboard tray.
• The hands should be at keyboard height.
• The monitor should be placed at eye level.
• When keyboarding it is important to sit up straight, have a padded wrist support, keep your arms straight, and take frequent breaks.