La2 2 3 Operating System f4

7/30/2019 La2 2 3 Operating System f4

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CONTENT

Introduction

Operating System (OS)

SummaryApplication Software

Utility Program

Proprietary and Open Source SoftwareSummary


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SYSTEM

SOFTWARE

OPERATING

SYSTEM

Windows

MAC OS X

LINUX

UNIX

UTILITY

PROGRAM

APPLICATION

SOFTWARE


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Is a set of programs that scheduletasks, allocates storage and presentsa default interface to the userbetween applications.

Many of the OS were device-dependent and proprietary.


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The Functions of


Starting a

computer

Providinguser

interface

Managingdata andprograms

Managingmemory

Configuringdevices


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Various Types of OS in Different Platform

1. PC Platform uses OS:a) Disk OS (DOS)

- Used a command line interface when Microsoft 1stdevelop.

- Its a closed source software.


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b) Microsoft Windows XP / Windows 7 / Windows 8

- Its operating environment is GraphicalUser Interface (GUI).

- Its a closed source software.



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2. Apple Platform uses OS:

a) Mac OS

- Its a 1st commercial successful GUI.

- Used in home desktop and workstations.



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b) Mac OS X

- Its a multitasking OS.- Used in home desktops, workstations andservers.

- Better security protection compared to Mac

OS.



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3. Cross-Platform uses OS:

a) UNIX- Multitasking OS.

- Offer command line interface and GUI.



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b) LINUX

- Is a popular, free and UNIX-like GUI.- Open source software.



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Different Interface of OS

User Interface is the part of an OS that you seeand interact with and by which users andprograms communicates with each other.

Importance of user interfaces are:1. To assist users interacting with a software.

2. To controlhow a user enters data andinstructions.

3. To control how information is displayed.


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3 types of user interfaces are:1. Command-line Interface

2. Menu-driven Interface

3. GUI

Types of Interfaces of OS

Command-line Interface

Requires user to type commandsto enter data and instructions

that instruct the OS what to do. Difficult to use because it

requires exact spelling, syntaxand a set of rules.

Advantage : Help user to operatecomputer quickly aftermemorizing the keywords andsyntax


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3. GUI


Menu DrivenInterface

Enable user to avoidmemorizing keywords suchas copy, paste and syntax.

On screen, it shows theoptions available at a givenpoint in a form of text-basedmenu.

Easy to learn.


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3. GUI


Graphical User Interface(GUI)

Makes use of computers graphics

capabilities to make the OS andprograms easier to use (user-friendly).

Used to create the desktop that

makes user easily differentiatebetween interface. Interact with menus and visualimages such as buttons, icons, andother graphical objects to issue

commands.


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Summary

OS is a set of programs presents a default interface to theuser between applications.

The functions of OS is starting a computer, providing a userinterface, managing data and programs, managing memoryand configuring Devices.

Various types of OS that uses different platform:

a) PC Platform - Disk OS (DOS) and Microsoft Windows XP

b) Apple Platform - Mac OS and Mac OS X

c) Cross-Platform - UNIX and LINUX

User Interface is the part of an OS that you see and

interact with. 3 types of user interfaces are, Command-line Interface,

Menu-driven Interface and GUI.


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Types of Application Software

1.

Word Processing An office application that enable userto create, edit, format and printtextual documents (Exp: MS Word).

2. Spreadsheet A program that processes information in `the form of tables. Table cells can hold

values and mathematical formulas(Exp: MS Excel).

3. Presentation Allow user to create visual AIDS orpresentation to communicate ideas,messages and other information to agroup (MS PowerPoint).

4. Graphics Program that edit digital representation ornon-text information such as drawings, chartsor photographs (Windows Movie Maker).


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Utility Program

Perform maintenance-type tasks related to the managing of

a computer, its devices and programs.

Enhance existing functions or provide services not suppliedby other software programs.

Most computer come with built-in utilities

Types of Utility Program

1. File Manager

- Software used to manage files on a disk.

- Provide functions of delete, copy, moves and view the

file as well as create and manage folders, formatting

and identify the capacity of the storage medium.


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2. Diagnostic Utility

- Compiles technical information about a computers

hardware and prepares a report outlining any identified

problems.

- Example : User guide (Help Menu)

3. File Compression Utility- Removes redundant elements, gaps and unnecessary

data from a computers storage capacity.

- Also called zipped files.

- A compressed file must be unzipped to its original form

before being used.

- Example : WinZip


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Proprietary and Open Source Software

1. Proprietary Software- Also called closed source software.

- Offers a stable system with support if the software fails

or malfunctions.

- Example : MS-DOS, Mac OS and UNIX.

2. Open Source Software

- Provide for use, modifications and redistributions.

- Can download from internet for free and make

improvement by the user.- Example : LINUX


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Differentiate Between Proprietary and

Open Source Software

Proprietary Software

(Windows XP)

Open Source Software

(LINUX)

Advantage

Runs on a wide range of

Hardware Has largest market share

Has many built-in utilities

Advantage

Runs on a wide range of

Hardware Has a largest number of a user

interface types

Can be used as server desktop

PC OS

Disadvantage Security problems

Not sufficient as a server OS

Have to reboot every time a

network configuration changed.

Disadvantage Limited support for games.

Limited commercial applications

available

Can be difficult to learn


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Summary

There are 4 types of Application Software :

1. Word Processing

2. Spreadsheet

3. Presentation

4. Graphics Utility Program perform maintenance-type tasks related

to the managing of a computer, its devices andprograms.

3 types of Utility Program are :

1. File Manager

2. Diagnostic Utility

3. File Compression Utility

Documents

La2 2 3 Operating System f4