This document summarizes different types of software. It describes system software like operating systems and utilities that allow hardware and other programs to function. It also discusses utility software for common tasks and application software for specific functions, giving examples like office suites and media players. Graphical and command line interfaces are covered as the primary ways users interact with software.

1. Software

2. Software System Software Application Software

3. System Software Operating Systems Utilities CLI Command Line Interface Drivers Assistants GUI Graphical User Interface NLI Natural Language Interface

4. Command Line Interfaces User types in commands to run programs, explore directories, get help etc… Requires some knowledge of command syntax Examples: DOS, UNIX Back to System Software

5. Graphical User Interfaces Easy to use interfaces WIMP – Windows, Icons, Mouse, Pull-down menus / Window, Icons, Menus, Pointers Examples: MS Windows XP, MS Windows Vista Back to System Software

6. Functions of System Software Allows the use of other hardware (peripherals). Provides an interface. Controls data and its access (records file information). Records computer use. Manages resources. Security.

7. Utility Software A supply of pre-written programs for performing frequently needed tasks. Used to manage & modify what the computer does at the user’s control. Examples: Drivers – control operation of peripherals. Disk doctor programs – restore data on damaged disks. Anti-virus programs Back-up utilities

8. Application Software Off-the-Shelf Customised

9. Off-the-Shelf Software Software designed with a particular function in relation to data. Associated file types represented by file extensions. Integrated programs allow for data sharing (e.g.: Office suite)

10. Examples of File Extensions .fla, .swf Adobe Flash .mp3 Audio .pdf Adobe Writer .txt Notepad / text editors .html Web pages .bmp, .jpg, .gif Graphics software .mdb MS Access .ppt MS PowerPoint .xls MS Excel .doc, .docx MS Word