Standard Input Devices section 2a This lesson includes the following sections: · The Keyboard · The Mouse · Variants of the Mouse.

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Presentation transcript:

Standard Input Devices section 2a

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 * * * * *

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

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 1.Pointing; Move the mouse to move the on-screen pointer. 2.Clicking; Press and release the left mouse button once. 3.Double-clicking; Press and release the left mouse button twice. 4.Dragging; Hold down the left mouse button as you move the pointer. 5.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 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.

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

Section 2a 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.