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Summary Computer Applications Technology Theory Notes Grade 12 $6.27   Add to cart

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Summary Computer Applications Technology Theory Notes Grade 12

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This summary covers all the theory notes of the year and fully covers the book: Computers Part of your life Grade 12.

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  • October 14, 2022
  • 59
  • 2022/2023
  • Summary
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Computers in our everyday lives
Module 1.1

1. WHY WE USE COMPUTERS

• Efficiency – computers save the following:
✓ Time.
✓ Labour.
✓ Resources.

• Accuracy – ensured by quality programs and quality data.
✓ mass production on assembly lines.
✓ performing the same tasks over and over with 100% accuracy.

• Reliability – Computers can be relied on to do tasks
✓ Accurately.
✓ without tiring.
✓ without getting bored.

2. COMMUNICATION

• Efficiency, accuracy, and reliability of computers combined with the ability to
communicate, enable us to ...
✓ virtually eliminate time and distance as business constraints.
✓ communicate and share information in many different ways globally.
✓ save on communication costs.
✓ interact socially on a worldwide scale.

3. TYPES OF COMPUTER SYSTEMS

• When comparing computers, you should look at:

✓ How powerful they are:
➢ e.g., speed of CPU and how much RAM.

✓ What they are used for:
➢ servers / basic office applications

✓ Their size (mobility)
➢ range from huge mainframe computers to hand‑held devices.

✓ Software they use:
➢ we refer to operating systems as ‘platforms’ and to computers as ‘Linux
machines’ or ‘Windows machines’.


Copyright@SmartSummaries 1

, • Non‑portable computers
✓ Generally, consist of a system unit, monitor, mouse, and keyboard.
✓ They are:
➢ Large in size.
➢ Not meant to be moved around.
➢ Generally, more powerful than mobile or portable computers.

✓ Entry-level computer
➢ Cheapest to purchase in the range.
➢ Lower hardware specifications.
➢ Come with ‘Home editions’ of software.

✓ Types of non-portable computers:
➢ Server
➢ Desktop computer

All‑in‑one units are easier to transport and take up less space — but are more difficult
to fix or upgrade.

• Portable computers
✓ All‑in‑one design includes screen, keyboard and pointing device
✓ Incorporated in casing designed to
➢ fold (to take up less space)
➢ be easy to carry.
➢ protect delicate parts.

✓ Types of portable computers:
➢ Laptop/Notebook
➢ Tablet

➢ Hybrid computer
➢ Smartphone
➢ Phablet

4. CATEGORIES OF USERS
• Personal users
✓ limited office tasks
✓ internet banking
✓ email and browsing the web
✓ social networking
✓ to skype with family and friends
✓ viewing and sharing photos
✓ for entertainment — gaming, music, viewing movies, etc.




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, • SOHO users (Small Office Home Office)
✓ Depends on type of business the user runs.

✓ General entry-level computer for administrative
functions:
➢ accounting or billing
➢ databases with clients, suppliers, stock, etc.
➢ electronic document archiving
➢ planning and scheduling, etc.

• Power users
✓ These users use top-of-the-range software:
➢ Hardcore gamers
➢ Architects
➢ Scientists
➢ Video editing professionals
➢ Engineers

• Mobile users
✓ Want and need to have their technology with them wherever they are.

✓ They use a smartphone or tablet for:
➢ browsing the internet and using email.
➢ playing games.
➢ reading books.
➢ navigating with GPS.
➢ taking quick notes.
➢ taking photos/video and recording sound.

5. CONVERGENCE
• The trend where separate technologies and functions that previously required
different devices are combined into a single device.
• The smartphone and the tablet are good examples of convergence.




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, Hardware devices
Module 1.2

1. THE INFORMATION PROCESSING CYCLE




• Input:
✓ Planning the data that needs to be collected.
✓ Deciding on the best way to capture data.
✓ Planning and creating data capture forms or instructions.

• Output:
✓ Sent directly to storage.
✓ Communicated directly to other computers.
✓ Used as an input for other programs, systems, or parts
of the same program.
✓ Used to control equipment or devices.

• Processing:
✓ Takes place only when software and data are loaded into RAM.
✓ Uses a step-by-step solution (algorithm)
✓ Uses data that has been input and creates information that can be output.

✓ Typically involves tasks such as:
➢ Searching, sorting, comparisons, decisions, and mathematical
calculations.
• Storage:
✓ Choose the correct storage media.
✓ Use security to protect sensitive data (encryption and physical safekeeping)
✓ Create and implement good backup policies.
✓ Create and use storage of non-IT related media (e.g., manual input forms)
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