This document discusses the key features and objectives of an operating system. It defines an operating system as a program that acts as an interface between software and hardware, managing computer resources and monitoring the execution of programs. The objectives of an operating system are to make the computer system convenient and efficient to use by hiding hardware details from users, providing a user interface, and acting as an intermediary between hardware and users. Operating systems also manage resources, track resource usage, and provide fair sharing of resources among users and programs. The characteristics of operating systems include memory management, processor management, device management, file management, security controls, job accounting, performance monitoring, user interaction, error detection, and coordination between software and users.

1. 1
Operating System

2. 2
It is a program with following
features:
An operating system is a program
that acts as an interface between
the software and the computer
hardware.

3. 3
It is a program with following
features:
It is an integrated set of
specialised programs that are
used to manage overall resources
and operations of the computer.

4. 4
It is a program with following
features:
It is specialised software that
controls and monitors the
execution of all other programs
that reside in the computer,
including application programs
and other system software.

5. 5
It is a program with following
features:
It is specialised software that
controls and monitors the
execution of all other programs
that reside in the computer,
including application programs
and other system software.

6. 6
Objectives of Operating
System
1. To make a computer system
convenient to use in an efficient
manner
2. To hide the details of the hardware
resources from the users

7. 7
Contd…
1. To provide users a convenient
interface to use the computer system
2. To act as an intermediary between the
hardware and its users and making it
easier for the users to access and use
other resources

8. 8
Contd…
1. To manage the resources of a computer
system
2. To keep track of who is using which
resource, granting resource requests,
according for resource using and mediating
conflicting requests from different programs
and users
3. To provide efficient and fair sharing of
resources among users and programs

9. 9

10. 10
Characteristics of Operating
System
1. Memory Management
2. Processor Management
3. Device Management
4. File Management
5. Security
6. Job accounting
7. Control over system performance
8. Interaction with the operators
9. Error-detecting aids
10.Coordination between other software and users

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