Computer Science Operating Sysytem

Topics: Operating system, Microsoft Windows, Linux Pages: 12 (1617 words) Published: July 28, 2013
7/24/2013

Learning Outcomes
• Identify types of operating system • Explain the functions of operating system

2.6 SOFTWARE
2.6.1 SYSTEM SOFTWARE 2.6.1.1 OPERATING SYSTEM
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What is software?
• Software (program) consists of a series of related instructions, organized for a common purpose, that tells the computer what tasks to perform and how to perform them. • How does user interact with software?

Two (2) Categories of Software
• System Software o consists of the programs that control or maintain the operations of the computer and its devices. o serves as the interface between the user, the application software, and the computer’s hardware. o Two types of system software :  Operating system  Utility Program • Application Software o consists of programs designed to make users more productive and/or assist them with personal tasks.

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USER

GRAPHIC USER INTERFACE

SOFTWARE

What is an operating system (platform)?
• Operating system is a set of programs containing instructions that work together to coordinate all the activities among computer hardware resources. • Many of the first operating systems were device dependent and proprietary. o A device dependent program is one that runs only on a specific type or make of computer. o Proprietary software is privately owned and limited to a specific vendor or computer model.

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What is an operating system (platform)?
• Today’s trend : towards device-independent operating systems that run on computers provided by a variety of manufacturers.  The advantage of device independent operating systems is user can retain existing application software and data files even if they change computer models or vendors

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3 Types of Operating System


1. Stand-alone Operating System
A stand-alone operating system is: o a complete operating system that works on a desktop computer, notebook computer, or mobile computing device • Some stand-alone operating systems are called client operating systems because they also work in conjunction with a server operating system. Client operating systems can operate with or without a network. • Examples of Stand-alone Operating System:

Stand-alone

Server

Windows 7
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Mac OS X

UNIX

Embedded

Linux

1. Stand-alone Operating System: Windows 7
• Windows 7 is: o Microsoft’s fastest, most efficient operating system to date and is available in multiple editions: Windows 7 Starter Windows 7 Home Premium

1. Stand-alone Operating System
• Windows 7 provides programs such as:

Windows Firewall

Windows DVD Maker

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1. Stand-alone Operating System : Mac OS X
• Apple’s Macintosh operating system has set the standard for operating system ease of use and has been the model for most of the new GUIs developed for non-Macintosh systems. • Mac OS Xis a multitasking operating system available only for computers manufactured by Apple.

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Windows 7 Ultimate

Windows 7 Professional

Windows Media Player

Desktop Gadget Gallery

1. Stand-alone Operating System: UNIX & Linux

UNIX is a multitasking operating system developed in the early 1970s. Power users often work with UNIX because of its flexibility and power.

Linux is an open-source, popular, multitasking UNIX-type operating system faizahibrahim© faizahibrahim©

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2. Server Operating System
• an operating system that is designed specifically to support a network. • resides on a server. The client computers on the network rely on the server(s) for resources. • Examples of server operating system:

3. Embedded Operating Systems
• An embedded operating system resides on a ROM chip on a mobile device or consumer electronic device Windows Embedded CE Windows Mobile

Palm OS

a. Windows Server 2008
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b. UNIX

c. Linux
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iPhone OS...
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