Chapter 3 Input Devices, Study notes of Computer Fundamentals

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CSCA

COMPUTING BASICS

Chapter 3

Input Devices

Input Devices

Topics:

• Input Devices
• Examples of Input Device
• Keyboard
• Pointing Devices
• Graphic and Video Input Devices
• Audio Input Devices

Input Devices

Examples of Input Device

• Keyboard
• Mouse
• Touchscreen
• Graphic tablet
• Microphone
• Scanner

Input Devices

Keyboard

• One of the primary input devices used with a computer.
• The keyboard looks very similar to the keyboards of electric typewriters, with some additional keys.
• Keyboards allow a computer user to input letters, numbers, and other symbols into a computer
• Uses an arrangement of buttons or keys.
• Requires pressing and holding several keys simultaneously or in sequence.

Input Devices

Types of Keyboard

Standard

• Desktop computer keyboards, such as the 101-key US traditional keyboards or the 104-key Windows keyboards, include alphabetic characters, punctuation symbols, numbers and a variety of function keys.

Input Devices

Types of Keyboard

• Standard
• Laptop
• Gaming and Multimedia
• Thumb-sized
• Virtual
• Foldable

Input Devices

Types of Keyboard

Gaming and Multimedia Keyboard

• The gaming keyboards are designed for the convenience of the gamers and these types of keyboards provide the required controls on the keyboards like back lighting.

Input Devices

Types of Keyboard

Thumb-sized keyboard

• Smaller external keyboards have been introduced for devices without a built-in keyboard, such as PDAs, and smartphones.
• Small keyboards are also useful where there is a limited workspace.

Input Devices

Types of Keyboard

Foldable Keyboard

• Foldable keyboards are extremely good for travelling.
• Simply roll them up and then unroll them when you need them again.

Input Devices

Keyboard Layouts

• QWERTY

• QWERTZ

• AZERTY

• DVORAK

Input Devices

Keyboard Layouts

QWERTZ

• Used in Germany, Hungary and Czech Republic

Input Devices

Keyboard Layouts

AZERTY

• It is used by most French speakers based in Europe

Input Devices

Key Types

Key Type Example Alphanumeric A-Z, 0- 9 Punctuation. ,! “? Modifiers Shift, Space Bar, Enter, Ctrl, Alt Navigation Arrows, Home, Page Up System Command PrtScn, Esc, F1, Start

Input Devices

Key Types

Function keys

• The Function keys or F1 through F12 keys are used in programs as shortcut keys to performed frequently performed tasks.
• For example, the F1 key is the key to open the online help for most programs.