Lesson 3 Standard Methods of Input.

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Presentation transcript:

lesson 3 Standard Methods of Input

This lesson includes the following sections: The Keyboard The Mouse Variants of the Mouse

The Keyboard The Standard Keyboard Layout Ergonomic Keyboards How a Keyboard Works

The Keyboard - Standard Keyboard Layout 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 Most keyboards have keys arranged in five groups: 1. Alphanumeric keys 2. Numeric keypad 3. Function keys 4. Modifier keys 5. Cursor-movement keys

ACADEMIC RECORDS Password ENTER * * * * * Invalid Password

The Keyboard - Ergonomic Keyboards 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.

Ergonomic style

The Keyboard - How a Keyboard Works When you press a key: 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.

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 Using the mouse involves five 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.

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 the buttons. Many styles of trackball are available.

Variants of the Mouse - Trackpads A trackpad is a touch-sensitive pad that provides the same functionality as a mouse. To use a trackpad, you glide your finger across its surface. Trackpads provide a set of buttons that function like mouse buttons.

Introduction to Computers Peter Norton's Introduction to Computers

Integrated Pointing Devices Variants of the Mouse- Integrated Pointing Devices An integrated pointing device is a small joystick built into the keyboard. To use an integrated pointing device, you move the joystick. These devices provide a set of buttons that function like mouse buttons

lesson 3 Review Identify the five key groups on a standard computer keyboard. Describe the purpose of a mouse and the role it plays in computing. Identify the five essential techniques for using a mouse. Identify three common variants of the mouse.