An application processes test results from a manufacturing facility, then generates and archives quality reports. The application has been in production for five years. The application was developed…

An application processes test results from a manufacturing facility, then generates and archives quality reports. The application has been in production for five years. The application was developed by an outsourced company that is no longer in business. The source code is not available. It can run on any current Microsoft Windows Server operating system. What is this an example of?