Overview
This lecture covers the role of computers in daily life, types of computer systems, user categories, modular design, and the concept of convergence.
Why We Use Computers
- Computers improve efficiency, accuracy, and reliability in tasks.
- Enable global communication, saving time and costs, and allow for social and business interaction.
Types of Computer Systems
- Devices are compared based on power, intended use, size, and required software.
- Non-portable computers (desktops, servers) are powerful, not meant to be moved, and plug into wall outlets.
- Entry-level computers are the cheapest in a category, with lower hardware specs and basic software.
- Portable computers (laptops, tablets) are compact, easy to carry, but harder to fix or upgrade.
Modular Design
- Modular design means a computer's components (CPU, RAM, graphics card) can be replaced or upgraded individually.
- Desktops are highly modular; laptops and smartphones are less so, with more limited upgrade options.
Specialized Devices
- Head-mounted displays (HMD) are worn for virtual reality (VR) and augmented reality (AR), creating digital or mixed environments.
- Drones, also called unmanned aerial vehicles, fly without a pilot and can carry cameras or items.
Categories of Computer Users
- Personal users: Perform basic tasks like internet banking, email, browsing, and entertainment.
- Small Office/Home Office (SoHo) users: Use entry-level computers for administration, accounting, and planning.
- Power users: Need high-end hardware for tasks like gaming, video editing, engineering, or science.
- Mobile users: Require technology on the go, using smartphones or tablets for browsing, navigation, and media.
Convergence
- Convergence is the merging of different technologies or functions into a single device, such as a smartphone or tablet.
Key Terms & Definitions
- Efficiency — Performing tasks quickly with less waste of resources.
- Modular Design — A design approach allowing individual computer parts to be replaced or upgraded.
- Entry-level Computer — The most affordable and basic version in a range, with lower specifications.
- Head-mounted Display (HMD) — A wearable device providing VR or AR experiences.
- Virtual Reality (VR) — A digital environment completely separate from the real world.
- Augmented Reality (AR) — Overlays digital content onto the real world.
- Drone/Unmanned Aerial Vehicle — Aircraft flown remotely without a pilot.
- Convergence — Combining multiple device functions into a single product.
Action Items / Next Steps
- Revise grade 10 and 11 computer theory concepts.
- Learn the definitions of new terms, especially convergence, modular design, and user categories.