The document provides an overview of operating systems and application software. It discusses how the operating system manages hardware resources and allows multiple programs to run concurrently. It also describes common types of application software like word processors, spreadsheets, databases, and web browsers. The document explains that while companies typically use commercially available software, customized software may be developed internally using programming languages to gain a competitive advantage.

1. Information Systems: Creating Business Value by Mark Huber, Craig Piercy, and Patrick McKeown Field Guide B: Details of IT Software

7. Comparison of Operating Systems Feature Mainframe Network Personal Computer Handheld Device Number of Simultaneous Users Multiple Multiple One One Security Sophisticated Sophisticated Minimal/user-enabled Minimal/user-enabled Peripherals Complex Numerous Few Few Number of tasks Many Many Many Few Support Systems programmers Networked-certified personnel User Provider Example OS390 Novell NOS Windows XP Windows Mobile

9. Parts of an OS

11. Starting the Computer

13. JCL for Mainframe

16. Result of DOS DIR/W Command

18. Example of Multitasking

20. Hierarchical File Structure

31. Commonly Used Languages Language Common Use C (including C++ and C#) Writing a wide variety of applications for PCs or network servers. Java Writing software for all types of computers; also, for writing browser and server-side Web software. PHP Writing Web-based applications. SQL(Structured Query Language) Writing queries to relational database management systems. VB.NET (Visual Basic .NET) Writing software for PCs; also, for writing browser and server-side Web software (Microsoft’s competition of Java).

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