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1. Definition

1.1. Consists of a series related instruction,organized for a cammon purpose that tells the computer what taks to perform and how to perform them.

2. System Software

2.1. Operating System(OS)

2.1.1. Defination:- Is a set of programs containing instructions that work together to coordinate all the activities among computer hardware resource.

2.1.2. Types Of OS Stand Alone Operating System -Is a compplete operating system that works on a desktop computer, notebook computer. Proprietary Software Open Source Software Mobile Operating System -An operating system that is designed to support a network. Proprietary Software Open Source Software Server OperatingSystem -An mobile operating system resides on a firmware on a mobile device. Proprietary Software Open Source Software

2.1.3. Function Of Os Start and Shutdown Provide a user Interface Manage Program Manage Memory Establish an Internet Connection Monitor Performance Content a Network

2.2. Utility Program

2.2.1. Defination:- Is a type of system software that allows auser to perform maintenance-type task.

2.2.2. Types Utility Program File Manager: -To provide routine file mangement task Disk Cleanup: -Search and remove unnecessary Comperation tools: -To shirnk the size of a file Anti-Virus Program: -To protect a computer against virus by identifiying and removing any computer viruses found in memory ,on storage media . Spyware Remover: -To detect and deletes spyware Disk Defragmenter: -To reorganizes the file and unused space on computer hard disk Backup And Restore: -A backup utility allows users to copy files to another storage medium in case ofdamage or lose. -A restore utility reverses the process and returns backed up file to their original form.

3. Application Software

3.1. Web Browers -A software that allows users to access and interact with software from any computer /device that is connected to the internet.

3.1.1. Propriety Software Internet Explorer Safari

3.1.2. Open Source Software Mozilla Firefox Chrome

3.2. Presentation Software -Presentation software allows users to create to create visual aids for presentation to communicate ideas, messages, and other information to a group.

3.2.1. Propriety Software Microsoft Office Powerpoint Keynote(Apple)

3.2.2. Open Source Software Impress Showcase

3.3. Spreadsheet Software -A spreadsheet software allows users to organize data in rows and column and perform.

3.3.1. Propriety Software Microsoft Office Excel Numbers(Apple)

3.3.2. Open Source Software Calc KCells

3.4. Word Processing Software -A software that allows users to create and manipulated document.

3.4.1. Propriety Software Microsoft Office Word Pages(Apple)

3.4.2. Open Source Software KWord

3.5. Database Software -A database is a collection of data organized in a manner that allows access, retrieval and use of that data.

3.5.1. Propriety Software MIcrosoft Office Accesss Oracle DB

3.5.2. Open Source Software Base MariaDB