November 1, 2014
1. Define software. Explain how system software is different from application software. Describe networking operation system (NOS). Describe enterprise applications. Differentiate between a horizontal system and a vertical system. Define legacy systems.
Software is the computer programs that govern the operation of the computer.
System software is used for basic computer operations such as startup and printing for example Windows 7. Whereas, application software such as Microsoft Office 2010 allows you to perform specific tasks such as word processing and tabulation of numbers.
(Stair & Reynolds, 1992, p.14).
“A network operation system (NOS) is a systems software that controls the computer systems and devices on a network and allows them to communicate with each other” (Stair & Reynolds, 1992, p.254). Much like how the operating system software performs for the computer, NOS offers task management, memory, and coordination of hardware for the network. Some examples of this would be Novell NetWare and Windows 2008 (Stair & Reynolds, 1992, p.254).
“An enterprise application is a business application, obviously. As most people use the term, it is a big business application. In today’s corporate environment, enterprise applications are complex, scalable, distributed, component-based, and mission-critical. They may be deployed on a variety of platforms across corporate networks, intranets, or the Internet. They are data-centric, user-friendly, and must meet stringent requirements for security, administration, and maintenance. In short, they are highly complex systems” ("Chapter 1: What is an enterprise application?", 2014).
With horizontal systems you keep adding more systems to help with the increases in demand. So if you need have 3 systems that work on Node, and your load gets higher you add another system with Node to help with the load. Vertical systems references that instead of adding
References: Chapter 1: What is an enterprise application? (2014, January 1). Retrieved November 2, 2014, from http://msdn.microsoft.com/en-us/library/aa267045(v=vs.60).aspx Class (computer science). (2014, October 26). Retrieved November 2, 2014, from http://en.wikipedia.org/wiki/Class_(computer_science) Legacy system. (2014, October 27). Retrieved November 2, 2014, from http://en.wikipedia.org/wiki/Legacy_system Milewski, L. (2011, March 14). What is the Vertical and Horizontal distribution? Retrieved November 2, 2014, from http://stackoverflow.com/questions/5845459/what-is-the-vertical-and-horizontal-distribution Morris, K. (2014, January 1). Steps in the System Development Life Cycle. Retrieved November 2, 2014, from http://smallbusiness.chron.com/steps-system-development-life-cycle-43241.html Stair, R., & Reynolds, G. (1992). Principles of information systems: A managerial approach (10th ed.) Structured analysis. (2014, October 27). Retrieved November 2, 2014, from http://en.wikipedia.org/wiki/Structured_analysis Structured Analysis - System Design Development. (2014, January 1). Retrieved November 2, 2014, from http://www.codeobsessed.com/structuredanalysis.html