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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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Operating System (OS)
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
Operating System (OS)
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.
Various Types of OS in Different Platform
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2. Apple Platform uses OS:
a) Mac OS
- Its a 1st commercial successful GUI.
- Used in home desktop and workstations.
Various Types of OS in Different Platform
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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.
Various Types of OS in Different Platform
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3. Cross-Platform uses OS:
a) UNIX- Multitasking OS.
- Offer command line interface and GUI.
Various Types of OS in Different Platform
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b) LINUX
- Is a popular, free and UNIX-like GUI.- Open source software.
Various Types of OS in Different Platform
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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 types of user interfaces are:1. Command-line Interface
2. Menu-driven Interface
3. GUI
Types of Interfaces of OS
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 types of user interfaces are:1. Command-line Interface
2. Menu-driven Interface
3. GUI
Types of Interfaces of OS
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