• Understanding of Central Processing Unit (CPU) • How do computers work?.. Ergonomics and Input Devices[r]
(1)Learning About Parts of Computer
ADE100- Computer Literacy
(2)Knowledge test
• What is computer?
(3)Topics covered
• Input devices (contd.)
• Interfacing with the computer using mouse &
keyboard
• Output devices • Storage devices
(4)What is input?
• Any data or instructions used by a computer • Types of input:
• Data- text form
• Instructions- particular commands
(5)The Keyboard
• How keyboard works?
• Keyboard controller (a tiny chip) detects a key pressed
and places a code into its memory called buffer (a
temporary memory area)
• Controller sends a code to the CPU
• Code represents the key pressed
• Controller sends a signal to the operating system • Operating system responds
(6)The Mouse
• Common mouse actions are:
• Right click • Left click
• Drag & drop • Move
• Scroll
(7)The Mouse
• Benefits
• Pointer positioning is fast • Menu interaction is easy
(8)The Mouse
• Mouse button
configuration
• Configured for a
right-handed user
• Can be reconfigured
• Left mouse button is
called a primary button
• Extra buttons are
configurable
• Procedure
• Go to control panel
(9)Ergonomics and Input Devices
• Ergonomics
• Study of human and tool interaction • Concerned with physical interaction
(10)Ergonomics and Input Devices
• Repetitive Strain/Stress Injury (RSI)
• Caused by continuous misuse of the body • Many professionals suffer from RSI
• Carpal Tunnel Syndrome (CTS)
• Carpal tunnel is a passage in the wrist • Holds nerves and tendons