SS1 Second Term Data Processing Lesson Note – Operating System

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WEEK 5                                                                                  

Topic: Operating System:

CONTENT:

• Definition of operating system
• Types of operating system.

SUB TOPIC 1

DEFINITION OF OPERATING SYSTEM

Operating System is system software that manages computer hardware and software resources and provides common services for computer programs. All computer programs, excluding firmware, require an operating system to function.  OR

An operating system is the most important software that runs on a computer. It manages the computer’s memory, processes, and all of its software and hardware. It also allows you to communicate with the computer without knowing how to speak the computer’s “language.” Without an operating system, a computer is useless.

Pictorial representation of operating system

Sub Topic 2:

TYPES OF OPERATING SYSTEM

• GUI (Graphical User Interface)
• Multi-user
• Single-user
• Multiprocessing
• Multitasking
• Multithreading
• Real-time operating system

GUI – Short for Graphical User Interface, a GUI Operating System contains graphics and icons and is commonly navigated by using a computer mouse. Examples are: System 7.x, Windows 98, Windows CE

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