An operating system (OS) is a program that manages the computer hardware and software resources and allows users to interact with the computer. It performs tasks like managing the processor, memory, storage, and interfaces. There are different types of operating systems including real-time operating systems used to control machinery, single-user single-task systems that allow one user to do one thing at a time, and single-user multi-tasking systems like Windows and MacOS that most people use on desktops and laptops.

1. (OS) OPERATING SYSTEM
LESSON 3

2. WHAT IS AN OS?
• OS stands for operating system
• It is a program that lets you interact with the
computer
• It runs on a computer and manages the computer
processes, the hardware and software.

3. WHAT ARE THE FUNCTIONS?
•It manage the hardware and software resources of
the computer system
•It provides a stable and consistent way for
managing applications or program to match with
the hardware
•It can add security updates, system patch, new
application and formatting commands to install a
fresh operating system in case of malfunctioning.

4. WHAT ARE THE FUNCTIONS?
•It can be installed and used for special purpose
applications like robotics, real-time control system.
•It can be changed and modified because it is made
up of portable codes.
•It performs the tasks of managing the following
-processor, memory, device, storage,
application interface, user interface

5. TYPES OF OPERATING SYSTEM
1. REAL TIME OPERATING SYSTEM (RTOS)
- this is used to control machinery, scientific
instruments and industrial system.
2. SINGLE –USER; SINGLE TASK
- it is designed to manage the computer so that
the one user can effectively do one thing at a time

6. TYPES OF OPERATING SYSTEM
3. SINGLE-USER; MULTI-TASKING
- it is a type of operating system that most
people use using desktop and laptop.
Examples: MS Windows, Apple Mac OS
4. MULTI-USER
- it is allows many different user to take
advantage of the computers resources
simultaneously.