The document discusses operating systems and computer software. It defines an operating system as a set of programs that manages computer resources and flow of information. It describes the main functions of an operating system as process management, memory management, file management, and device management. The document also outlines different types of operating systems, including multiprogramming, multitasking, real-time systems, and batch processing systems.

1. OPERATING
SYSTEM AND
COMPUTER
SOFTWARE
Prepared by – Geetanjali,Soumya,
Kanika,Varnita & Priyanka

2. Operating System
 Operating System is an integrated set of
programs that manages overall performance
and functioning of the computer system by
controlling the resources (CPU, memory, I/O
devices etc) and overall flow of information
within the system.
 The operating system organises and controls
the hardware.

3. Functions of Operating
System
 Process Management - It takes care of
creation and deletion of processes.
 Memory Management – It takes care of
allocation and de-allocation of memory space
to programs.
 File Management – It takes care of file-related
activities such as
storage, retrieval, naming, sharing.
 Device Management – It controls all I/O
devices. It provides simple and easy to use
interface.

4. TYPES OF OPERATING
SYSTEM
Multiprogramming Multitasking
Real Time
Systems Batch Processing

5.  Multiprogramming refers to a form of
processing in which computer holds more than
one program in the memory and executes
them concurrently on a multiuser operating
system.

6.  Multitasking refers to form of processing
supported by most of current operating
systems in which computer works on multiple
tasks of one user with one central processor.
 Multitasking eases user operation and saves
lots of time when a user has to switch between
two or more applications while performing a
job.

7.  Real-Time system is a system that satisfies
the requirement of producing the desired
results before a specified deadline.

8.  Similar type of jobs are firstly prepared and
they are stored on the card and then this card
will be submitted to the system for processing.
The system then perform all the operations on
the instructions one by one.

9. Computer Software