Lecture Notes: Theory Modules 1.1 to 1.4

Introduction

• Overview of theory modules 1.1 to 1.4.
• Focus on key concepts and typical questions.
• Modules are foundational for future terms and revisions.

Module 1.1: Why We Use Computers

• Efficiency, Accuracy, Reliability: Key reasons for computer use.
• ICT Advancements: Time, labor savings, mass production, improved communication.
• Communication Evolution: From 20, 30, 50 years ago to now.

Types of Computer Systems

• Buying Considerations: Purpose, scenarios, laptops, desktops, notebooks, smartphones, tablets.
• Non-Portable Computers: Larger size, more powerful, examples include desktops and servers.
• Entry-Level Computers: Cheapest in range, lower hardware specs, home edition software.
• Portable Computers: All-in-one design (laptops, notebooks, etc.), easy to carry.

Categories of Users

• Personal User: Basic usage, limited office tasks.
• Soho User: Small office/home office tasks, entry-level hardware.
• Power Users: Require more powerful hardware for intensive tasks (e.g., video editing).
• Mobile Users: Light usage on mobile devices.

Convergence and Information Processing Cycle

• Convergence: Different technologies combined into one device.
• Information Processing Cycle: Steps in processing data into information; important for exam questions.

Module 1.2: Input, Output, and Storage Devices

Input Devices

• Keyboards and Mice: Common devices, troubleshooting issues (e.g., connectivity).
• Touchscreens and Touchpads: Input/output combo, limitations.
• Scanners: Convert physical to digital, OCR software for editable text.
• Digital Cameras and Webcams: Usage, buying considerations (resolution, sensor size).
• Microphones: Capture audio, potential issues with connectivity.

Output Devices

• Monitors: Quality determined by resolution, pixel density, refresh rate.
• Speakers and Headphones: Audio output, potential connectivity issues.
• Printers: Laser vs. Inkjet, usage depending on printing needs.
• 3D Printers and Projectors: Usage, limitations, troubleshooting.

Storage Devices

• Hard Drives and SSDs: Permanent storage, speed differences, energy efficiency.
• Optical Media: CDs, DVDs, largely obsolete due to lower capacity.

Module 1.3: Communication and Hardware Recommendations

Communication Devices

• Cellular Modems and Routers: Internet connectivity, differences between ADSL and fiber.

Hardware Recommendations

• System Unit and CPU: Key components in processing data.
• RAM and Graphics Cards: Importance for performance, especially for power users.
• Peripheral Ports: Types and purposes, importance for connectivity.

Module 1.4: Software

Software Types

• Purpose and Functionality: Choosing software based on needs (e.g., Notepad vs. Word).
• Web-Based vs. Installed Applications: Pros and cons of each.
• Subscription vs. Traditional Licensing: Differences in payment and usage models.

System Requirements

• Meeting Requirements: Ensures optimal software performance.

Application Software

• Office Suites and Productivity Software: Usage for various tasks.
• Reference and Email Software: Browsers, search engines, and email management.

Software Problems and Solutions

• Fixing Software Issues: Methods for handling crashes and freezes.
• Bugs vs. Viruses: Understanding differences, importance of updates.

Conclusion

• Modules 1.1 to 1.4 cover essential knowledge on computer systems and applications.
• Understanding these topics prepares students for exams and practical scenarios.