Input and Output Devices

Touch screen

Visual display unit with touch-sensitive capabilities for input

Input devices

Devices like a keyboard that input raw data into a computer

Output devices

Devices like a monitor that display processed data from a computer

Manual input devices

Devices such as keyboard and mouse that require human operation

Automatic input devices

Devices like magnetic strip readers that input data without human intervention

Trackball

Input device operated by rotating a ball to move the pointer on screen

Microphone

Device used to input sound into a computer

Video digitiser

Device that digitizes images from a video camera for computer use

Graphics tablet

Flat pad with a special pen for accurate on-screen drawing

Magnetic stripe reader

Device that scans and inputs data from magnetic stripes on cards

Optical Mark Reader (OMR)

Device that reads marks made by pencil on printed forms into a computer

Monitor

Output device that displays processed data from a computer

Backing up data

Creating copies of data to prevent loss in case of deletion, failure, or disasters

Frequency of backups

Determining how often data should be backed up based on its value and change frequency

Archiving data

Copying and storing data that is not frequently used but may be needed in the future

Data security

Protecting data from damage, loss, theft, or unauthorized access

Key threats to data security

Potential risks like system crashes, viruses, hacking, and natural disasters that can compromise data

Online banking security

Using encryption and secure connections to protect data during online transactions