An operating system (OS) manages computer hardware and software resources, and provides common services to programs. The document discusses several types of OS including: Real-time OS which processes inputs very quickly to control environments like scientific experiments. Multi-user OS allows multiple users to access a single system with one OS. Multitasking OS runs more than one process simultaneously and controls CPU and resource allocation. Distributed OS manages computational nodes over a network. Embedded OS is specialized for computers within larger systems like phones, printers, and other devices.

1. Welcome to the Second term syllabus

2. Today’s Lecture on
Types of Operating System(OS)

3. What is OS ?
An operating system (OS) is system
software that manages computer
hardware and software resources and
provides common services for
computer programs.

4. Example of OS

5. Types of OS
● Real Time OS
● Distributed OS
● Single Tasking vs Multitasking OS
● Multiuser OS
● Embedded OS
● Network OS
● Time-sharing OS

6. Real Time OS
● A real-time system is defined as a data processing system
in which the time interval required to process and respond
to inputs is so small that it controls the environment.
● Example: Scientific experiments, medical imaging
systems, industrial control systems, weapon systems,
robots, air traffic control systems, etc.

7. Multiuser OS
● A multi-user operating system is an operating system that
allows multiple users on different computers or terminals to
access a single system with one OS on it.
● Example:
Windows NT
Windows Vista
Windows XP
Xenix

8. Multitasking OS
● A (preemptive) multitasking OS is able to run more than
one process simultaneously and has control over which
process is using the CPU and other resources at each
time
● Example
Microsoft Windows 2000,
Linux

9. Distributed OS
● A distributed operating system is a software over a
collection of independent, networked, communicating, and
physically separate computational nodes.
● Example
Microsoft Windows Server 2003, Microsoft Windows
Server 2008, UNIX, Linux, Mac OS X, Novell NetWare,
and BSD

10. Distributed OS

11. Embedded OS
● An embedded operating system is a specialized OS for use in
the computers built into larger systems. An embedded system is
a computer that is part of a different kind of machine.
● Example
Symbian - Used in cell phones, mainly ones made by Nokia.
Embedded Linux - Of which Android is a subset, used in many
other devices like printers.
BlackBerry OS - For BlackBerry phones.
iOS - Subset of Mac OS X, used in Apple's mobile devices.
Palm OS.

12. Thank you