CAT GR 12
CAT Notes – Robin Naude 1
, INDEX
Contents
Module 1.1 ..................................................................................................................................... 4
Computers in our everyday lives ................................................................................................ 4
Why do we use computers? .................................................................................................... 4
CATEGORIES users ............................................................................................................. 5
Convergence ........................................................................................................................... 6
Module 1.2 ..................................................................................................................................... 7
Hardware devices ........................................................................................................................ 7
Information processing cycle ................................................................................................. 7
Input devices .......................................................................................................................... 7
Risks associated with human input devices ........................................................................ 12
discharge devices .................................................................................................................. 12
storage devices ...................................................................................................................... 16
Storage decisions .................................................................................................................. 19
communication devices ....................................................................................................... 19
Virtual reality and augmented reality .................................................................................. 20
Module 1.3 ................................................................................................................................... 21
Hardware Recommendations .................................................................................................. 21
Buying a computer ............................................................................................................... 21
The value of ICT .................................................................................................................. 23
Module 1.4 ................................................................................................................................... 25
Software .................................................................................................................................... 25
Choose the right software .................................................................................................... 25
Compatibility ....................................................................................................................... 26
System requirements ............................................................................................................ 26
Application software ............................................................................................................ 26
Software that improves access, efficiency and productivity ................................................ 27
Solving software problems ................................................................................................... 27
Module 1.5 ................................................................................................................................... 30
Systems Software and Computer Management ...................................................................... 30
OPERATING SYSTEMS .................................................................................................... 30
OPERATING SYSTEM UTILITIES .................................................................................. 31
CAT Notes – Robin Naude 2
, SECURITY TOOLS ............................................................................................................ 33
FACTORS THAT INFLUENCE WORK PERFORMANCE .......................................... 34
TROUBLESHOOTING AND REPAIRING USING UTILITIES .................................. 35
Module 2.1 ................................................................................................................................... 36
Internet connections and services ........................................................................................... 36
Different networks ............................................................................................................... 36
INTERNET CONNECTIONS ........................................................................................... 36
WIRED AND WIRELESS CONNECTIONS ................................................................... 37
INTERNET SERVICES ...................................................................................................... 38
Module 2.2 ................................................................................................................................... 41
The dangers of computer crime. .............................................................................................. 41
Techniques and tools of computer crime ........................................................................... 41
CATEGORIES computer crime ......................................................................................... 41
Protect Yourself from Computer Crime ............................................................................. 42
Module 2.3 ................................................................................................................................... 44
E-communication ..................................................................................................................... 44
USES OF DIGITAL COMMUNICATION ...................................................................... 44
EFFECTIVE USE OF THE WEB ...................................................................................... 45
NEW TRENDS AND TECHNOLOGIES ........................................................................ 46
Module 2.4 ................................................................................................................................... 47
The impact of technology ........................................................................................................ 47
ADVANTAGES AND DISADVANTAGES OF TECHNOLOGY IN SOCIETY .......... 48
Remember: ................................................................................................................................... 49
CAT Notes – Robin Naude 3
, MODULE 1.1
Computers in our everyday lives
WHY DO WE USE COMPUTERS?
They improve efficiency, accuracy, reliability and communication
EFFECTIVENESS:
• Save time
• Reduce workload
• Save resources (paper)
RELIABLE:
• Are programmed to do the same tasks over and over again in a specific way.
• Don't get tired and stop working/do it halfway
ACCURACY:
• Accurate calculations so that the process can be carried out accurately.
• If the software and data that computers work with are of high quality, they are very accurate.
COMMUNICATION:
• No longer limited by time and distance (Zoom/ VoIP)
• Can communicate and exchange information globally and in different ways
• Cost-effective (for calling and sending documents)
TYPES OF COMPUTERS
FACTORS TO CONSIDER WHEN COMPARING COMPUTERS
1. Power
• CPU (Central Processing Unit) speed – measured in GHz
• Amount of RAM
2. Use
• Server or client?
• For office work or pleasure (movies/games)?
3. Size and portability
• Laptop/ Tablet/ Smartphone
4. Software
NON-PORTABLE COMPUTERS
• Large and unportable (not made to be carried around)
• Consists of a system unit, keyboard and mouse
Types of non-portable computers:
1. Desktop computer
• Most common
• Available with different configurations.
CAT Notes – Robin Naude 4
CAT Notes – Robin Naude 1
, INDEX
Contents
Module 1.1 ..................................................................................................................................... 4
Computers in our everyday lives ................................................................................................ 4
Why do we use computers? .................................................................................................... 4
CATEGORIES users ............................................................................................................. 5
Convergence ........................................................................................................................... 6
Module 1.2 ..................................................................................................................................... 7
Hardware devices ........................................................................................................................ 7
Information processing cycle ................................................................................................. 7
Input devices .......................................................................................................................... 7
Risks associated with human input devices ........................................................................ 12
discharge devices .................................................................................................................. 12
storage devices ...................................................................................................................... 16
Storage decisions .................................................................................................................. 19
communication devices ....................................................................................................... 19
Virtual reality and augmented reality .................................................................................. 20
Module 1.3 ................................................................................................................................... 21
Hardware Recommendations .................................................................................................. 21
Buying a computer ............................................................................................................... 21
The value of ICT .................................................................................................................. 23
Module 1.4 ................................................................................................................................... 25
Software .................................................................................................................................... 25
Choose the right software .................................................................................................... 25
Compatibility ....................................................................................................................... 26
System requirements ............................................................................................................ 26
Application software ............................................................................................................ 26
Software that improves access, efficiency and productivity ................................................ 27
Solving software problems ................................................................................................... 27
Module 1.5 ................................................................................................................................... 30
Systems Software and Computer Management ...................................................................... 30
OPERATING SYSTEMS .................................................................................................... 30
OPERATING SYSTEM UTILITIES .................................................................................. 31
CAT Notes – Robin Naude 2
, SECURITY TOOLS ............................................................................................................ 33
FACTORS THAT INFLUENCE WORK PERFORMANCE .......................................... 34
TROUBLESHOOTING AND REPAIRING USING UTILITIES .................................. 35
Module 2.1 ................................................................................................................................... 36
Internet connections and services ........................................................................................... 36
Different networks ............................................................................................................... 36
INTERNET CONNECTIONS ........................................................................................... 36
WIRED AND WIRELESS CONNECTIONS ................................................................... 37
INTERNET SERVICES ...................................................................................................... 38
Module 2.2 ................................................................................................................................... 41
The dangers of computer crime. .............................................................................................. 41
Techniques and tools of computer crime ........................................................................... 41
CATEGORIES computer crime ......................................................................................... 41
Protect Yourself from Computer Crime ............................................................................. 42
Module 2.3 ................................................................................................................................... 44
E-communication ..................................................................................................................... 44
USES OF DIGITAL COMMUNICATION ...................................................................... 44
EFFECTIVE USE OF THE WEB ...................................................................................... 45
NEW TRENDS AND TECHNOLOGIES ........................................................................ 46
Module 2.4 ................................................................................................................................... 47
The impact of technology ........................................................................................................ 47
ADVANTAGES AND DISADVANTAGES OF TECHNOLOGY IN SOCIETY .......... 48
Remember: ................................................................................................................................... 49
CAT Notes – Robin Naude 3
, MODULE 1.1
Computers in our everyday lives
WHY DO WE USE COMPUTERS?
They improve efficiency, accuracy, reliability and communication
EFFECTIVENESS:
• Save time
• Reduce workload
• Save resources (paper)
RELIABLE:
• Are programmed to do the same tasks over and over again in a specific way.
• Don't get tired and stop working/do it halfway
ACCURACY:
• Accurate calculations so that the process can be carried out accurately.
• If the software and data that computers work with are of high quality, they are very accurate.
COMMUNICATION:
• No longer limited by time and distance (Zoom/ VoIP)
• Can communicate and exchange information globally and in different ways
• Cost-effective (for calling and sending documents)
TYPES OF COMPUTERS
FACTORS TO CONSIDER WHEN COMPARING COMPUTERS
1. Power
• CPU (Central Processing Unit) speed – measured in GHz
• Amount of RAM
2. Use
• Server or client?
• For office work or pleasure (movies/games)?
3. Size and portability
• Laptop/ Tablet/ Smartphone
4. Software
NON-PORTABLE COMPUTERS
• Large and unportable (not made to be carried around)
• Consists of a system unit, keyboard and mouse
Types of non-portable computers:
1. Desktop computer
• Most common
• Available with different configurations.
CAT Notes – Robin Naude 4
