1. System software
1.1. Operating system
1.1.1. 7 function of OS
1.1.1.1. Start and shutdown computer
1.1.1.1.1. Cold boot and warm boot
1.1.1.2. Provide user interface
1.1.1.2.1. A user interface controls how you enter data and insructions and how information is displayed on the screen
1.1.1.3. Monitor performance
1.1.1.3.1. A performance monitor is a program that assesses and reports information about various computer resources and devices
1.1.1.4. Manage program
1.1.1.4.1. An OS manages multiple programs and processes while you use the computer
1.1.1.5. Manage memory
1.1.1.5.1. Memory management optimizes the use of RAM
1.1.1.6. Control a network
1.1.1.6.1. A server OS organizes and coordinates how multiple users access and share resources on a network
1.1.1.7. Establish internet connection
1.1.1.7.1. OS typically provide a means to establish internet connection
1.1.2. Stand-alone OS: A complete operating that works on a desktop computer, notebook computer or mobile computing device
1.1.3. Server OS: Designed to support network
1.1.4. Mobile OS: Resides on a firmware on a mobile or consumer electronic device
1.2. Utility program
1.2.1. File manager
1.2.1.1. To provide routine file management
1.2.2. Disk cleanup
1.2.2.1. Searches and removes unnecessary files
1.2.3. Spyware remover
1.2.3.1. Utility device that protect computer from spy and delete it
1.2.4. Antivirus program
1.2.4.1. Utility device that protect computer from viruses
1.2.5. Disk defragmenter
1.2.5.1. To reorganizes the files and unused space on computer hard disk so that the OS accesses data more quickly and programs run faster
1.2.6. File compression tool
1.2.6.1. To shrink the size of a file/s
1.2.7. Backup and restore
1.2.7.1. A backup utility to allows users to copy files to another storage medium in case of damage or lost
1.2.7.2. A restore utility reverses the process and returns backed up files to their original form
2. Application software
2.1. Web browser software
2.1.1. A software that allows users to access and interact with software from any computer or device that is connected tio the internet
2.2. Presentation software
2.2.1. A software that allows users to create and manipulate documents
2.3. Spreadsheet software
2.3.1. Spreadsheet software allows users to organize data in rows and columns and perform calculations
2.4. Word processing software
2.4.1. Presentation software allows users to create visual aids for presentation to communicate ideas, messages and other information to a group
2.5. Database software
2.5.1. A database is a collection of data organized in a manner that allows access, retrieval and use of that data