Operating Systems

Outlines

• Operating System

• Types of Operating System

• Device Dependent Program

• Device Independent Program

• Network Operating System/ Server Operating System

What is Operating System (OS)?

• An operating system (OS) is a set of programs containing instructions that work together to coordinate all the activities among computer hardware resources.

Types of Operating Systems

• There are basically two Types:

1. Device Dependent Program

2. Device Independent Program

Device Dependent Program

• A device-dependent program is one that runs only on a specific type of computer.

• Proprietary Software is privately owned and limited to a specific vendor or computer model.

• Limitations of a software (such as most Linux, Mac, and Windows programs) that prevent it from running on more than one platform, or which requires a specific hardware to perform its functions.

• A device-dependent software cannot easily be moved from one type of computer to another, and usually requires large-scale modifications or rewriting of the original program.

Device Independent Programs

• Device-independent programs are those programs that runs on computers provided by variety of manufacturers.

• The trend today is towards device-independent programs.

• The big advantage of device-independent operating systems is you can retain existing application software and data files even if you change computer models or vendors.

Categories of Operating System

• The three basic categories that exist today are:

1. Stand-alone Operating Systems

2. Network Operating System (NOS)/ Server Operating Systems

3. Embedded Operating Systems

Stand-alone Operating Systems

• A stand-alone operating system is a completeoperating system that works on adesktop computer, notebook computer, ormobile computing device.

• Some are client operating systems that work in conjunction with a server operating system, with or without a network.

• Examples of Stand-alone Operating systems are Windows Vista, Mac OS X, UNIX and Linux.

Windows Vista

Mac OS X

UNIX

Linux

Network Operating System

• A network operating system/ server operating system is an OS that is designed specifically to support a network, and typically resides on a server.

• Network operating systems are designed specifically to support all sizes of networks, including medium to large-sized businesses and Web servers.

• Examples of Server Operating System are Windows Server 2012 R2, Solaris and Novell NetWare.

Windows Server 2012 R2

Solaris

Novell NetWare

Embedded Operating Systems

• The operating system on mobile devices and many consumer electronics, called an embedded operating system.

• Examples of embedded operating system are Windows Embedded CE, Windows Mobile, Palm OS, iPhone OS, BlackBerry OS, Google Android and Symbian OS.

Windows Embedded CE

Windows Mobile

Palm OS

iPhone OS

BlackBerry OS

Google Android

Symbian OS

Conclusion

• First of all we discussed about operating system and then the types of operating system, device dependent programs and device independent programs.

• Then the basic categories of OS like stand-alone operating system, network operating system/ server operating system and embedded operating system.

Thank you for concentration… Prepared by: Muhammad Faizan Akhter

Allah Hafiz…