Download - 3 definition of operating systems
![Page 1: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/1.jpg)
1
Operating Systems Basics of Operating Systems Definition of Operating Systems
OPERATING SYSTEMS
![Page 2: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/2.jpg)
2
Recap
In the last class, you have learnt about
• History of Operating System
• Types of Computers
• Different types of Operating Systems
![Page 3: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/3.jpg)
3
Objectives
On completion of this period, you would be able to know
• System Resources
• Types of Software
• Operating System viewed from User and System
perspective
• Goals of Operating System
• Definition of Operating System
![Page 4: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/4.jpg)
4
System Resources
What is a resource?
• A resource, or system resource, is any physical or
virtual component of limited availability within a
computer system
• System resources include– Hardware
– Software
![Page 5: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/5.jpg)
5
Components of a Computer System
A computer system can be divided into four components
• Hardware
• Operating System
• Application Programs
• Users
![Page 6: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/6.jpg)
6
User n
ComputerHardware
System and Application Programs
User 1 User 2 User 3
Operating System
Abstract View of a Computer System
![Page 7: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/7.jpg)
7
Hardware
• Physical components of a computer system
Ex: - I/O devices, Memory devices, CPU etc.,
![Page 8: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/8.jpg)
8
Software
• Set of programs
Program: - A finite set of sequence of instructions
![Page 9: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/9.jpg)
9
Types of Software
• System Software
• Application Software
![Page 10: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/10.jpg)
10
System Software
It provides an interface between software and
hardware
• Operating System
• Assembler
• Compiler
• Interpreter
• Linker
• Loader etc.,
![Page 11: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/11.jpg)
11
Application Software
Designed to work on an operating system
MS-Office Suite
MS-Word
MS- Power point
MS-Excel
MS-Access
Databases
Utilities etc.,
![Page 12: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/12.jpg)
12
Operating System
• It is an important part of almost every computer
system
• It is easier to define an Operating System by what
it does than by what it is
• It provides an environment to other programs to
do useful work
![Page 13: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/13.jpg)
13
Design of Operating System
• User Point of View
• Computer System Point of View
![Page 14: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/14.jpg)
14
OS - User Point of View
• For ease of use
• To maximize resource utilization
• To compromise between usability and resource
utilization
![Page 15: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/15.jpg)
15
OS - System Point of View
• OS as a resource allocator
• OS as a manager of these resources
• OS as a controller of I/O devices and user
programs
• Operating system as a control program, which
manages the execution of user programs
![Page 16: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/16.jpg)
16
Goals of Operating System
• To provide
– convenience for the user
– Efficient operation of the computer system
• Operating system is a way to solve the problem
by providing a usable computing system
![Page 17: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/17.jpg)
17
Definition
• Operating system is a system software
• It coordinates between hardware and software
• It is an interface between hardware and software
• It controls and manages resources
• It executes programs on behalf of users
![Page 18: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/18.jpg)
18
Summary
• Components of computer system
– Hardware, Software, Users
• Hardware : Physical components
• Software : Set of programs
• Operating System goals: Ease of use, efficient
operation of the computer system
• OS is a system software, which coordinates, manages
and controls resources on behalf of users
![Page 19: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/19.jpg)
19
Frequently Asked Questions
1. List the components of a computer system
2. What should be the Operating System from user
and system point of view?
3. Define Operating System
![Page 20: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/20.jpg)
20
Quiz
1. Which is the System Software?
a. MS-WORD
b. MS-EXCEL
c. WINDOWS
d. MS-ACCESS
![Page 21: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/21.jpg)
21
2) Which one is not a system software?
a) Databases
b) Interpreter
c) Compiler
d) Assembler
Quiz
![Page 22: 3 definition of operating systems](https://reader033.vdocuments.site/reader033/viewer/2022061208/548b6930b47959781e8b45ea/html5/thumbnails/22.jpg)
Other subject materials
22
• Web designing
• Micro processors
• C++ tutorials
• java
home