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1. Software is defined as 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.

2. Types Of Software

2.1. System Software

2.1.1. Consists of a program that control of maintain the operating of the computer and its device

2.1.2. Types Of System Software Operating System A set of programs containing instructions that work together to coordinate all the activities among computer hardware resources Types Of Operating System Utility Program A type of system software that allows user to perform maintanence-type task Types Of Utility Program

2.2. Application Software

2.2.1. Consists of programs designed to make users more productive and/or assist with personal tasks

2.2.2. Types Of Application Software Web Browser Allows user to access and interact with software from any computer or device that is connected to the Internet Word Processing Allows user to create and manipulate documents Spreadsheet Allows users to organize data in rows and columns and perform calculations Database Allows access , retrieval and use of that data Presentation Allows users to create visual aids for presentation to communicate ideas , messages and other information to a group

3. Functions Of Utility Program

3.1. File Manager

3.1.1. Performs function related to file management

3.2. Disk Cleanup

3.2.1. Searches and removes unnecessary files

3.3. File Compression Tools

3.3.1. To reduce the file size

3.4. Anti-Virus Program

3.4.1. To protect a computer against viruses by identifying and removing any computer viruses found in memory , on storage media or incoming files

3.5. Spyware Remover

3.5.1. To detect and delete spyware

3.6. Disk Defragmenter

3.6.1. To reorganize the files and unused space on computer hard disk so that the OS accesses data more quickly abd programs run faster

3.7. Backup And Restore

3.7.1. A restore utility reverses the process and returns backed up files to their original form

4. Functions Of Operating System

4.1. Start And Shutdown A Computer

4.1.1. The process of starting or restarting a computer

4.2. Provide A User Interface

4.2.1. Controls how you enter data and instructions and how information is displayed on the screen

4.3. Manage Program

4.3.1. Manages multiple programs and processes while you use the computer

4.4. Manage Memory

4.4.1. Optimizes the use of RAM

4.5. Establish An Internet Connection

4.5.1. Provide a means to establish Internet connection

4.6. Monitor Performance

4.6.1. Assesses and reports information about various computer resources and devices

4.7. Control A Network

4.7.1. Organizes and coordinates how multiple users access and share resources on a network

5. Categories Software

5.1. Open Source Software

5.1.1. Example For File Manager Operating System File Manager Disk Cleanup Disc Space Cleaner File Compression Tools 7-ZIP PKZIP Antivirus Program ClamWin Antivirus Spyware Remover Spyware Doctor Spyware Remover Spybot Spyware Blaster Nixory Disk Defragmenter MyDefrag Defraggler Backup And Restore AMANDA Bacula

5.2. Proprietary Software

5.2.1. Example For File Manager File Explorer ( Apple ) Window Explorer Window File Manager Disk Cleanup Microsoft Disk Cleanup Windows Disk Cleanup File Compression Tools WinZip WinRAR Antivirus Program Avira Antivirus Kapersky Antivirus Spyware Remover Spy Sweeper Kapersky Internet Security Disk Defragmenter Windows Disk Defragmenter Config Microsoft Defragmenter Backup And Restore Windows Backup And Restore