What is an example of a product that does have the core functionality of a listed category?
The draft Commission guidance gives a positive example for operating systems.
A software product that provides an abstraction layer over hardware, manages the execution of software components, handles process and memory management, input-output control, scheduling, resource allocation, and exposes system services and APIs so that applications can reliably run on the platform is treated in the guidance as having the core functionality of an operating system.
point 124 and Example 48