Answer: An embedded operating system.
Step-by-step explanation
An embedded operating system is an operating system that performs specifically designated tasks that another system needs.
For example, a car engine performs several tasks such as fuel injection, cooling, lubrication, steering and many other mechanical tasks that an embedded operating system does not address.
An embedded operating system may collect operational data from several sensors within the car engine, analyze the data in real time, and transmit the results to the main on board computer that monitors and adjusts for changes in the operational status of the engine.
Because an embedded operating system is usually designed to perform essential specific tasks, the embedded operating system should perform efficiently, reliably and be durable.