These slides give you the basic information about Operating System.

1. Introduction to Computing
Sayam Asjad
Sayem Rayyan
Zulqarnain Haider

2. Contents
Definition of OS
Function of operating
system
 A set of programs containing
instruction that work
together to coordinate all the
activities among computer
hardware resources.
 OS handles many of
functions automatically ,
without requiring any
instruction from user.

3. OS Function
 Starting and Shutting down a computer
 Providing a user interface
 Managing Programs
 Configuring devices
 Administering security

5. Starting and Shutting down a
computer
 Booting
 Cold boot
 Warm boot

6. Providing a user interface
 Definition : A user interface controls how
you enter data and instructions and how information is
displayed on the screen
 Graphical user interface
 Command-line interface

7. How OS managing a programs
 Single user /Single tasking OS
 Single user/Multitasking OS
 Multiuser OS
 Multiprocessor OS

8. How OS configure Devices
 Devices
 Keyboard,mouse,printer,scanner and monitor
 Driver
 A driver is a small program that tells the operating
system how to communicate with a specific device.
 Plug and Play

9. Administering security
 Administrator account
 Install programs
 Access files
 Create user account

10. Administrator account
Password
Private combination of characters
associated with users
OS compare password
OS can encrypt data so that
unauthorized user can’t read it.