Overview
This lecture introduces the four main layers of computer systems—hardware, operating system, software, and user—and explains why understanding these layers is crucial for IT professionals.
Computer System Layers
- Computers can be divided into four main layers: hardware, operating system, software, and user.
- Each layer interacts with the others to enable the overall functioning of a computer.
Hardware Layer
- The hardware consists of physical components like laptops, phones, monitors, and keyboards.
- Hardware is produced by many different manufacturers.
Operating System Layer
- The operating system (OS) allows hardware to communicate with the rest of the system.
- The OS enables the use of various hardware regardless of the manufacturer.
- Understanding the components of major operating systems (like Android and Windows) is essential for navigating any OS.
Software Layer
- Software is how users interact with computers, such as through apps, browsers, or word processors.
- Both the operating system and user applications are considered software.
- Learning how software is installed and used will be covered later in the course.
User Layer
- The user layer involves direct human interaction with the computer.
- User needs and issues are a central focus in IT roles.
- Most IT work involves supporting user interaction with technology.
Real-World Application & Problem Solving
- Applying knowledge of the computer’s layers helps resolve real-world issues.
- Problem-solving tactics are essential for identifying and fixing computer-related problems.
Key Terms & Definitions
- Hardware — The physical components of a computer system.
- Operating System (OS) — Software that manages hardware and allows it to communicate with other systems.
- Software — Programs and applications that allow the user to perform tasks on a computer.
- User — The person interacting with the computer system.
Action Items / Next Steps
- Prepare to learn about each component of computer hardware in the next lesson.
- Get ready to build a computer from component parts in an upcoming module.