Lesson 05.2

- Introduction to Operating System (OS)

- OS Interface Environment

LEARNING AREA

>> System Software

>> Functions of Operating System

>> The Differences Between Dos And Windows Display

>> OS Interface Environment

LEARNING OUTCOME• STUDENT SHOULD BE ABLE TO:

a. Define operating systemb. State the function of operating system

INTRODUCTION

SYSTEM SOFTWARE• System software consists of programs that

control the operations of the computer and its devices.

• System software serves as the interface between the user, the application software and the computer hardware.

SYSTEM SOFTWARE• 2 Types of system software

a. Operating System

b. Utility Programmes

OPERATING SYSTEM• Program that is loaded into the computer• Coordinates all the activities among

computer hardware devices.• Controls the hardware in the computer,

peripherals, manages memory and files.• Enables the user to communicate with the

computer and other software

OPERATING SYSTEM• Example :

UTILITY PROGRAMMES• Utility programmes allows user to perform

maintenance-type tasks.• It has been integrated into most major

operating systems such as format, check and defragment disks

UTILITY PROGRAMME• Example:

Functions Of Operating System

Turn on the Computer1. It loads the operating system into the computer's

memory, also called booting2. Booting means to load and initialize the operating

system on a computer machine

WHEN

Functions Of Operating System

3. It can happen in two ways: warm boot or cold boot.

Warm Boot

Cold Boot

Functions Of Operating System

WARM BOOT :>> A warm boot means restarting a computer that is already on.

>>It normally happens after installing a new software or hardware or after an application crashes or stops working.

Functions Of Operating System

COLD BOOT :>> A cold boot means starting a computer that is

already off.

>> It happens when we turn on a computer that has been completely powered off.

OS Interface Environment

The user interface typically enables users:

to start an application programto manage disks and files such as formatting,

copying and renamingto shut down the computer safely by following the

correct procedures

There are three types of user inter face :

OS Interface Environment

Command-LineMenu - Driven

GUI

# Graphical User Interface (GUI)

DOS Vs Windows

Characteristics Of Os Environment Based (GUI)

Graphical User Interface (GUI) is an interface that combines text, graphic and icons to make software easier to be used.

It I s also called ‘user-friendly’.

Characteristics GUI

Interact with the software

Controls how you enter data and how the screen displays information

Represent computer resources such as files, programs and network communication