What is a computer system that has been customized for a particular application and is considered completely finished for use?

A turnkey system refers to a computer system that is developed and customized for a specific application and is delivered fully functional, requiring no additional work for installation or setup. This means that all components, including hardware and software, are configured and tested to work together seamlessly, enabling immediate use once the system is delivered to the end-user.

Turnkey systems are ideal for businesses or organizations looking for solutions that can be implemented quickly and without the need for further development or integration efforts. The concept is based on the idea of providing a complete package that users can simply “turn the key” on and start using, thereby significantly reducing the time from acquisition to operational status.

In contrast, other options such as deterministic and non-deterministic systems generally relate more to the nature of processes or algorithms rather than the readiness or customized state of application systems. An electronic health record (EHR) system, while it could be a type of turnkey system, is not necessarily customized for a particular organization out of the box; it often requires further configuration and integration with existing systems, making the description of a fully finished application not applicable in this context.