Period 1: Core Computer Hardware Components

1. Key Concepts & Analogies

• Definition: Computer Hardware refers to the tangible, physical parts of a computing system that can be touched and felt.
• The System Unit (The Tower/Casing):
  • CPU (Central Processing Unit): Often called the "brain." It performs calculations and executes instructions. Speed is measured in Gigahertz (GHz), while efficiency is increasingly determined by Cores (multi-tasking capability).
    Analogy: The conductor of an orchestra; it tells the other instruments when to play.
  • RAM (Random Access Memory): Short-term memory that stores data currently being used by active applications. It is volatile, meaning data is lost when power is cut. High-speed RAM allows for smoother multitasking.
    Analogy: Your desk surface. You keep active projects here. If you clear the desk (shut down), work isn't gone, but you can't access it as quickly until you file it away.
  • Storage (Secondary Memory): Long-term storage that persists after shutdown.
    • HDD (Hard Disk Drive): Uses spinning magnetic platters. Durable for large capacity but slower due to mechanical movement.
    • SSD (Solid State Drive): Uses flash chips (no moving parts). Significantly faster read/write speeds, more shock-resistant, and lighter.
    • Update Note: Mention NVMe M.2 SSDs as the modern standard for high-performance laptops/PCs.
    
    Analogy: A library or filing cabinet where you store books/files permanently.
  • Motherboard: The main printed circuit board (PCB). It acts as the backbone, connecting all components and allowing them to communicate via electrical pathways.
    Analogy: The nervous system or skeletal structure of the body.
  • GPU (Graphics Processing Unit): Specialized processor dedicated to rendering images, video, and animations. Essential for gaming, graphic design, and AI processing.
  • PSU (Power Supply Unit): Converts alternating current (AC) from the wall into direct current (DC) for internal components.
  • Cooling System: Fans and liquid coolers that dissipate heat generated by the CPU/GPU to prevent overheating.

2. Peripheral Devices (I/O)

• Input Devices: Allow the user to send data/control signals into the system (e.g., Keyboard, Mouse, Webcam, Microphone, Biometric scanners).
• Output Devices: Translate digital data out into human-readable forms (e.g., Monitor, Printer, Speakers, Headphones).
• Hybrid Devices: Can function as both input and output (e.g., Touchscreens, Network Adapters, USB Flash Drives).

Period 2: Software Architecture & Operating Systems

1. Key Concepts & Definitions

• Definition: Software consists of intangible instructions, code, and programs that direct hardware to perform specific tasks. Without software, hardware is inert metal and plastic.
• Classification of Software:
  • System Software: Manages hardware and provides a platform for apps to run.
    • Operating System (OS): Windows, macOS, Linux, Android, iOS.
    • Firmware/Drivers: Low-level code embedded in hardware (BIOS/UEFI) or small programs (Device Drivers) that translate OS commands for specific hardware (e.g., a printer driver).
  • Application Software (Apps): Programs designed for the end-user to complete specific productivity or entertainment tasks.
    • Examples: Word processors (Office), Web Browsers (Chrome), Media Players, Games.

2. Core Functions of an Operating System

1. Process Management: Orchestrates CPU time among multiple running programs so they don't crash into each other.
2. Memory Management: Ensures every app gets the RAM it needs and prevents software conflicts.
3. File System Management: Organizes data storage using logical structures (folders, files) rather than raw sectors (NTFS, APFS, ext4).
4. Device Management: Acts as an intermediary via drivers between the OS and hardware peripherals.
5. User Interface (UI):
   • GUI (Graphical User Interface): Visual icons/windows (standard for most users).
   • CLI (Command Line Interface): Text-based commands (standard for servers and developers).
6. Security & Permissions: Manages user accounts, encryption, passwords, and firewall settings to protect data.

3. Comparative Analysis: Hardware vs. Software

Recommended Assessment (End of Week 2)

• Quiz: 5 Questions identifying hardware parts and 5 questions defining OS functions.
• Mini-Project: Have students write a paragraph explaining to a non-tech friend what happens when they click a "YouTube Video," linking the actions to CPU, RAM, Storage, and Network Hardware.