An application processes test results from a manufacturing facility, then generates and archives
quality reports. The application runs on an old, but still supported UNIX system. It was developed
by an organization’s IT department 10 years ago.
While it has not been changed in over five years, the application source code and skills needed to
modify it are still available internally.
What is this an example of?

A.
A legacy application

B.
Vendor lock-in

C.
An enterprise application

D.
Service-oriented architecture