SSS 2 Computer Notes

       

SSS Two Computer Studies/ICT

 

Lesson Notes have been prepared in the following SSS 2 Key Topics:

Computer Files

• Understand what makes up every digital piece of information.
• Explore how computers internally represent and store your data.
• Grasp the fundamental concept of data units on any device.

   

Mastering Your Data

       

• Learn the essential operations: Create, Delete, Retrieve.
• Discover how to Copy, View, and Update your digital documents.
• Gain full control over managing your computer's files efficiently.

       

     

Word Processing

       

• Get clear definitions of word processing and what a word processor actually is.
• Explore popular examples of word processors, including Microsoft Word, WordPerfect, and WordStar.
• Discover the diverse application areas where word processing is essential: from offices and publishing to journalism and education.
• Learn about the fundamental facilities available in word processors, such as typing, editing, storing, moving, copying, and pasting documents.
• Uncover key features that make word processors so powerful, including document management, formatting, justification, and search and replace functions.

       

       

Spreadsheets

       

• Get a clear definition of what spreadsheets are and why they're so powerful.
• Explore examples of popular spreadsheet applications (like Microsoft Excel and Google Sheets).
• Discover the diverse uses of spreadsheet applications in various fields, from budgeting to data analysis.



• Learn the practical steps for loading and exiting spreadsheet programs.
• Master the essential skills of creating, saving, and retrieving your own spreadsheet files.

   

     

The Central Processing Unit (CPU)

• Discover the CPU and its vital role as the computer's "brain."
• Explore its core components: the Arithmetic Logic Unit (ALU) and the Control Unit.
• Understand the specific functions of the ALU in calculations and logic.
• Learn how the Control Unit directs and coordinates all computer operations.

       

   

The Memory Unit

• Explore the different types of memory units: Primary (Main/Internal) and Secondary (Auxiliary/External).
• Get clear descriptions of both primary and secondary memory.
• Understand the key differences between primary and secondary storage.
• Master the units of storage (bits, bytes, etc.) and how to convert between them.
• Compare various auxiliary storage devices based on their speed, size, and underlying technology.

       

   

Logic Circuits I (standard Single Logic Gates)

• Get a clear definition of a logic gate and its role in digital circuits.
• Discover the main types of standard logic gates: AND, NOT, and OR.
• Learn to recognize the symbols for each logic gate.
• Understand the input and output signals for AND, NOT, and OR gates.
• Master the construction of truth tables for these fundamental gates.
• Explore the Boolean equations that represent AND, NOT, and OR logic.
• Uncover the real-world uses of logic gates in computer systems.

       

   

     

Logic Circuits II (alternative Logic Gates)

       

• Get a clear description of alternative logic gates and their significance.
• Explore the key types of alternative gates: NAND and NOR.
• Learn to recognize the unique symbols for both NAND and NOR gates.
• Master the truth table construction for NAND and NOR gates.
• Understand the input and output signals and their corresponding equations for these gates.
• Discover expanded uses of logic gates in more complex circuits.
• Learn the fascinating process of constructing a simple comparator.

       

       

Computer Data Conversion

• Get clear definitions for key components like Registers, Addresses, and Buses.
• Explore the different types of registers and their specific roles.
• Understand the critical differences between registers and main memory.
• Break down the steps in the data fetch-execution cycle – how your CPU processes instructions!
• Discover the various factors that affect the speed of data transfer within a computer system.

       

System Development Life Cycle (SDLC)

• Get a clear definition and comprehensive description of the System Development Life Cycle (SDLC).
• Discover all the essential stages in the SDLC, from initial ideas to ongoing support.
• Explore each phase in detail: Preliminary Study, Feasibility Study, Investigative Study, Analysis, Design, Implementation, Maintenance, and Review.
• Understand the specific activities and goals of every stage in creating high-quality systems.

       

   

Program Development

• Get a clear definition of what a program is and why it's essential for computers.
• Discover the key characteristics of a good program, including accuracy, readability, maintainability, and efficiency.
• Learn important precautions and best practices to follow during program development (e.g., don't rush, no skipping steps).
• Explore the comprehensive steps involved in program development, from problem definition and analysis to flowcharting and desk checking.
• Understand a description of each stage in the development process.
• See practical examples of both interpreted and compiled programs.

       

   

Algorithms and Flowcharts

     

• Get clear definitions of both algorithms and flowcharts.
• Discover the essential functions and characteristics of a good algorithm: finite, effective, and unambiguous.
• Learn to write algorithms for common problems, such as computing averages and printing odd numbers.
• Explore key flowchart symbols like input/output, process, and decision.
• Understand the use of each flowchart symbol in diagramming solutions.
• Practice creating flowchart diagrams for solving given problems.

       

BASIC Programming II (Built-in Functions)

• Explore essential BASIC built-in functions like SQR, INT, SIN, and ABS.
• Understand their BASIC notation and how to use them effectively.
• Learn to write BASIC programs to find square roots within a given range.
• Discover how to calculate cosine and tangent of values using BASIC.
• Get hands-on experience by writing programs to plot sine and cosine curves!

       

   

Internet

     

• Get a clear definition of the Internet and its global impact.
• Master basic Internet terms like browse, browser, cyberspace, download, upload, and protocol.
• Explore different types of web browsers (e.g., Mozilla, Google Chrome) and their key features (menu bar, address bar, etc.).
• Discover the diverse types of Internet services, including Email, discussion groups, video conferencing, FTP, and the World Wide Web.
• Understand the numerous benefits of the Internet in daily life and beyond.

       

   

Electronic Mail (E-mail)

     

• Grasp the meaning and definition of Email and its importance in modern communication.
• Explore the various services offered by Email platforms.
• Learn the step-by-step process of creating your own Email account.
• Understand the structure and importance of an Email Address.
• Master the procedure for sending an Email – from composing to attaching files.
• Briefly touch on chatting and its relation to online communication.
• Discover the many advantages of using Email for personal and professional communication.