3. SOME COMPONENTS OF OPERATING SYSTEM
WHAT IS AN OPERATING SYSTEM
HISTORY OF OPERATING SYSTEM
FUNCTIONS OF OPERATING SYSTEM
i). EVOLUTION OF OPERATING SYSTEM
ii). WORK OF OPERATING SYSTEM
iii). BENEFITS OF OPERATING SYSTEM
MODERN DAY OPERATING SYSTEM
4. Operating system is an integrated set of program that
controls the resources of a computer system and provides
its users with an interface or virtual machine that is easier
to use than the bare machine
Operating System is a software, which makes a computer
to actually work.
It is the software the enables all the programs we use.
OS acts as an interface between the application programs
and the machine hardware.
5. Microsoft Windows operating system was developed by
Microsoft to overcome the limitation of its own MS-DOS
operating system.
First successful version were Windows 3.0, released in 1990.
Subsequently released version were Windows 95, Windows
98, Windows 2000,etc.
Microsoft initially announced the Windows product seven
years earlier and released the first version in 1983.
6. A separate module of operating system software performs
each of the function:
(1).Process management:- Process management module
takes care of creation and deletion of processes, and
providing mechanisms for synchronization and
communication among processes.
(2). Memory management:- Memory management module
takes care of allocation and de-allocation of memory space
to programs in need of this resources.
(3). File management:- It takes care of file-related
activities such as organization storage, retrieval, naming,
sharing, and protection of files.
(Contd..)
7. (4). Security:- Security module protects the resources and
information of a computer system against destruction and
unauthorized access.
(5). Command interpretation:- Command interpretation
module takes care of interpreting user commands, and
directing system resources to process the commands.
9. The two primary objectives of an operating system are:
(1). Make a computer system easier to use:- An
operating system hides details of hardware resources
from programmers and other users and provides them
with a convenient interface for using a computer system.
(2). Manage the resources of a computer system:- An
operating system manages all the resources of a
computer system. Efficient and fair sharing of system
resources among users and/or programs is a key goal of
all operating systems.
