Standard Methods of Input • The Keyboard • The Mouse • Variants of the Mouse The Keyboard • If the CPU is the brain of the computer, then the input devices are its eyes and ears. • The keyboard was one of the first peripherals to be used with computers, and it is stil the primary input device. • The Standard Keyboard Layout • Ergonomic Keyboards • How a Keyboard Works | Standard Methods of Input lesson 3 This lesson includes the following sections: The Keyboard The Mouse Variants of the Mouse The Standard Keyboard Layout Ergonomic Keyboards How a Keyboard Works The Keyboard A standard computer keyboard has about 100 keys. Most keyboards use the QWERTY layout, named for the first six keys in the top row of letters. The Keyboard - Standard Keyboard Layout 5. Cursor-movement keys 4. Modifier keys 3. Function keys 2. Numeric keypad 1. Alphanumeric keys Most keyboards have keys arranged in five groups: The Keyboard - Standard Keyboard Layout ACADEMIC RECORDS Password ENTER Invalid Password * * * * * Long periods of keyboard use can cause injuries. An ergonomically correct keyboard can help you avoid injuries. You also can avoid injuries by adopting correct keyboarding practices. The Keyboard - Ergonomic Keyboards Ergonomic style The keyboard controller detects the keystroke. The controller places a scan code in the keyboard buffer, indicating which key was pressed. The keyboard sends the computer an interrupt request, telling the CPU to accept the keystroke. When you press a key: The Keyboard - How a Keyboard Works The Mouse What is a Mouse? Mouse Techniques The Mouse - What is a Mouse? The mouse is a pointing device. You use it to move a graphical pointer on the screen. The mouse can be used to issue commands, draw, and perform other types of input tasks. The Mouse - Mouse Techniques Pointing; Move the mouse to move the on-screen pointer. Clicking; Press and release the left mouse button once. Double-clicking; Press and release the left mouse button twice. Dragging; Hold down the left mouse button as you move the pointer. Right-clicking; Press and release the right mouse button. Using the mouse involves five techniques: Variants of the Mouse Trackballs Trackpads Integrated Pointed Devices Variants of the Mouse - Trackballs A trackball is like a mouse turned upside-down. Use your thumb to move the exposed ball and your fingers to press | Standard Methods of Input lesson 3 This lesson includes the following sections: The Keyboard The Mouse Variants of the Mouse The Standard Keyboard Layout Ergonomic Keyboards How a Keyboard Works The Keyboard A standard computer keyboard has about 100 keys. Most keyboards use the QWERTY layout, named for the first six keys in the top row of letters. The Keyboard - Standard Keyboard Layout 5. Cursor-movement keys 4. Modifier keys 3. Function keys 2. Numeric keypad 1. Alphanumeric keys Most keyboards have keys arranged in five groups: The Keyboard - Standard Keyboard Layout ACADEMIC RECORDS Password ENTER Invalid Password * * * * * Long periods of keyboard use can cause injuries. An ergonomically correct keyboard can help you avoid injuries. You also can avoid injuries by adopting correct keyboarding practices. The Keyboard - Ergonomic Keyboards Ergonomic style The keyboard controller detects the keystroke. The controller places a scan code in the keyboard buffer, indicating which key .
