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1. categories

1.1. open source

1.1.1. created by unpaid volinteers, begin to gain wide acceptance among computer users

1.1.2. freely

1.2. proprietry

1.2.1. privately owned and limited to a specific vendor/ computer model

1.2.2. license/ paid

2. System Software

2.1. operating system

2.1.1. an OS a set of programs containing instructions that work together to coordinate all the activities among computer hardware resources Stand-alone use for works on a desktop computer, netbook computer/ mobile computing device server designed specifially to support network embedded use for mobile device or concume electronic device

2.2. Utility program

2.2.1. an OS that allows a user to perform maintenance-type task File manager to provide routine file management tasks Disk Cleanup to searches and remove unnecessary files File compression tools to shrinks the size of a files Anti-virus Program to protects a computer against viruses by identfying and removing computer viruses found in memory spyware remover to detects and deletes spyware Disk defragmentar to organizes the files and unused space on computer hard disk Backup and restore utility allows users to copy files to another storage medium in case of damage or lost

2.3. Application software

2.3.1. definition: concists of programs designedto makeusers more productive and/or assist with personal task

2.3.2. type web browser allow users to access and view web pages word processing allows users to create and manipulate documents spreadsheet allow users to organize data in rows and columns and perform calculations database a collection of data organized in a manner that allows access, retrieval and use of that data presentation to create visual aids for presentating

3. definition

3.1. definition: series ofinstructions that tells the computer what task to perform and how to perform them