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OPERATING SYSTEM
INFORMATION TECHNOLOGY TRAINING
Submitted by-
Archit Garg
CRO0407919
Submitted to-
Priyank Varshney
INFORMATION TECHNOLOGY TRAINING
ACKNOWLEDGMENT
I would like to express my special thanks of gratitude to
my teacher ‘CA. Priyank Varshney’ who gave me the
golden opportunity to do this wonderful project on the
topic ‘Operating System’, which also helped me in
doing a lot of research and I came to know about so
many new things.
INFORMATION TECHNOLOGY TRAINING
CONTENTS
What is an Operating system?
Functions
Characteristics
Types of operating system
INFORMATION TECHNOLOGY TRAINING
An interface between users and hardware
Manages computer hardware and
software
Allows efficient usage
Provides information Protection
Acts as control program
INFORMATION TECHNOLOGY TRAINING
FUNCTIONS
Process Management- Some major activities:-
1.Creation and deletion of user and system processes
2.Suspension and resumption of processes
3.A mechanism for process synchronization
Memory Management- Some major activities:-
1.To keep track of ‘which part of memory are currently being used and by whom’
2.To decide ‘which process is loaded into memory when memory space becomes available; and to allocate and de-allocate memory space, as needed
Continue…..
INFORMATION TECHNOLOGY TRAINING
CONTINUE…..
File Management- Some major activities:-
1.The creation and deletion of files;
2.The creation and deletion of directions;
3.The backup of files on stable storage media
Device Management- A computer system consists of
I/O devices such as printer, mouse, keyboard. The
device management module of an operating system
takes care of all I/O devices.
Continue…..
INFORMATION TECHNOLOGY TRAINING
CONTINUE…..
Security- Computer systems often store large amounts
of information, some of which is highly sensitive and
valuable. Users can trust the system and rely on it
against destruction and unauthorized access
INFORMATION TECHNOLOGY TRAINING
Characteristics
Time Sharing -Provides
simultaneous use of computer
by many user
Multiprocessing–Multiple CPU’s execute work of
many people
Distributed Systems –
several computers are
connected together to
share resources
Real time systems – It gives rapid
response time, e.g..- Facebook,
INFORMATION TECHNOLOGY TRAINING
•
TYPES OF OPERATING SYSTEM
1.UNIX
Developed in 1969 by AT&T at Bell Labs
Multi-User Computer Operating System
Used for internet servers, workstations, and mainframe computers
Main feature- Portability
INFORMATION TECHNOLOGY TRAINING
First introduced in 1984
It is a series of graphical user interface based OS
It is world's most advanced OS
Ability to run apps
It has a 64-bit architecture
INFORMATION TECHNOLOGY TRAINING
2.Mac OS:-
It is a single-user, single-tasking computer OS
It uses command line interface
Released in 1981
It was 16-bit OS
It was designed by Microsoft and IBM
INFORMATION TECHNOLOGY TRAINING
3.MS-DOS:-
Windows 95:-
• Minimum system requirement
• Released in1995
• It was also referred as Windows 4.0
• ‘Plug and Play’ feature was introduced
INFORMATION TECHNOLOGY TRAINING
Processor 386DX
RAM 4 MB
Hard Drive 128 MB
Windows XP:-
• Launched in October 2001
• XP was successor of windows 2000
• Minimum requirement
• Multiprocessor Support
• Security against virus attack
INFORMATION TECHNOLOGY TRAINING
Processor Pentium 233 MHZ
RAM 64 MB
Hard Disk 1.5 GB
Windows 7:-
• A redesigned taskbar and multi-touch support
• Minimum requirement
• Better search facility for files and documents
• Improved GUI
• Better Security
• Support Multi-core Processor
INFORMATION TECHNOLOGY TRAINING
Processor 1 GHZ
RAM 2 GB
Hard Disk 16 GB
Graphics DirectX 9
THANK YOU
INFORMATION TECHNOLOGY TRAINING
