Software

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Software is divided into parts

System software Operating system Utility software

Application software

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System Software

When purchase a personal computer, it usually has system software installed on its hard drive.

System software consists of the programs that control or maintain the operations of the computer and devices.

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System software serves as the interface between the user, the application software, and the computer’s hardware.

Two type of system software are operating systems and utility programs.

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Operating System

OS is a set of programs containing instructions that work together to coordinate all the activities among computer hardware resources.

An operating system can run from an optical disc and/or flash memory mobile media, in most cases, the operating system is installed and resides on the computer’s hard drive.

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On handheld computers typically use different operating systems because operating system generally are written to run on a specific type of computer.

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Operating System Functions

Starting and Shutting Downcold boot and warm boot

Providing a user interfaceGraphical User Interface(GUI)Command-Line Interface

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Operating System Functions (Cont.)

Managing Programs

Managing Memory

Coordinating Tasks

Configuring Devices

Establishing an Internet Connection

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Operating System Functions (Cont.)

Monitoring Performance

Providing File Management and Other Utilities

Updating Software Automatically

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Operating System Functions (Cont.)

Controlling a Network

Administering Security

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Type of Operating Systems

Many of the first OS were device dependent and proprietary.

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

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

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

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Stand-Alone Operating System

Stand-Alone Operating System is a complete operating system that works on a desktop computer, notebook computer, or mobile computing device.

Some stand-alone operating system are called client operating systems because they also work in conjunction with a server operating system.

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Can operate with or without a network.

Example: Windows Vista, Mac OS X, UNIX, and Linux

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Server Operating Systems

Server Operating Systems is an operating system that is designed specifically to support a network.

Typically resides on a server.

Example: Windows Server 2008, UNIX, Linux, Solaris, and NetWare

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Embedded Operating Systems

The operating system on mobile devices and many consumer electronics, called an embedded operating system, reside on a ROM chip.

Popular embedded operating system today include Windows Embedded CE, Windows Mobile, Palm OS, iPhone OS, BlackBerry, embedded Linux, and Symbian OS.

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Application Software

Application software consists of programs designed to make users more productive and/or assist with personal task

To make business activities more efficient

To assist with graphics and multimedia projects

To support home, personal, and educational tasks

To facilitate communications

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Application Software

Available in a variety of forms:

Packaged software

Custom software

Web application

Open source software

Shareware

Freeware

Public-domain software

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System software serves as the interface between the user, the application software, and the computer’s hardware

Utility programs

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Utility Programs

A utility program, also called a utility, is a type of system software that allows a user to perform maintenance-type tasks, usually related to managing a computer, its devices, or its programs.

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Functions provided by utility programs include: managing files, searching for files, viewing images, uninstalling programs, cleaning up disks, defragmenting disks, backing up files and disks, setting up screen servers, securing a computer from unauthorized access, ect.

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Business software

Business software is application software that assists people while performing business activities

Word Processing Spreadsheet

Database Presentation

Note taking

Business software for phone

Project management ect.22