Software

1. System software

1.1. user interface

1.1.1. graphical user interface (GUI)

1.1.1.1. icons

1.1.1.2. menu

1.2. device drivers

1.3. utility programs

1.4. operating system (OS)

1.4.1. Microsoft Windows

1.4.1.1. Microsoft Windows Server

1.4.2. Macintosh operating system (Mac OS)

1.4.3. embedded system

1.4.4. Linux

1.4.5. Unix

1.4.6. desktop

2. Application software

2.1. software license

2.2. shareware

2.3. public-domain software

2.4. pirated software

2.5. freeware

2.6. open-source software

2.7. exporting

2.8. importing

2.9. productivity software

2.9.1. word processing software

2.9.1.1. word wrap

2.9.2. personal information manager (PIM)

2.9.2.1. financial software

2.9.3. spreadsheet program

2.9.3.1. formulas

2.9.3.2. functions

2.9.4. computer-aided design (CAD)

2.10. multimedia authoring software

2.11. database

2.11.1. database software

2.11.2. data files

2.11.2.1. file

2.11.2.1.1. filename