Your R&D group has developed and tested a computer software package that assists engineers to control the proper chemical mix for the various process manufacturing industries. If you decide to market the software, your first year operating net cash flow is estimated to be $1,000,000. Because of market competition, product life will be about 4 years, and the product’s market share will decrease by 25% each year over the previous year’s share. You are approached by a big software house which wants to purchase the right to manufacture and distribute the product. Assuming that your interest rate is 15%, for what minimum price would you be willing to sell the software?

A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. 
An 'information system' means a discrete set of information resources organized for the collection, processing, maintenance, use, sharing, dissemination, or disposition of information.

Engineering economics, previously known as engineering economy, is a subset of economics concerned with the use and "...application of economic principles" in the analysis of engineering decisions.