Computer software

1. System software

1.1. Operating system

1.1.1. Server OS

1.1.2. Stand alone OS

1.1.3. Mobile OS

1.2. Function of operating system

1.2.1. Start and shut down a computer

1.2.2. Provide user interface

1.2.3. Manage program

1.2.4. Manage memory

1.2.5. Establish internet connection

1.2.6. Control a network

1.2.7. Moniter performance

1.3. Utility software

1.3.1. File manager

1.3.2. File compression tools

1.3.3. Disk cleanup

1.3.4. Disk defragmenter

1.3.5. Antivirus software

1.3.6. Spyware remover

1.3.7. Backup and restore utility

2. Application software.

2.1. Word processing software

2.2. Presentation software

2.3. Spreadsheet software

2.4. Database software

2.5. Web browser software