Large-scale enterprises are really something to behold. Take one small example. A certain large company has cafeterias in many locations. Each of these cafeterias is like a small enterprise. And it has nothing to do with the core business itself. To order food, you need an app. Someone has to build, test, deploy, and maintain that app. It also has a back-end. Someone has to build and maintain those servers as well. There's also a payment component and everything that comes along with that.

The cafeteria itself is a large scale enterprise, wholly enclosed inside the larger scale enterprise.