GitHub scopes and namespaces

The main entities in GitHub are repositories. A repository can be created for a user or an organization. The URL of the repository will be in the following format:

https://github.com/<username>/<repository>

https://github.com/<organization>/<repository>

For GitHub Enterprise Server, you must replace https://github.com with the URL of your server. A user and organization name on a platform must be unique since they provide a namespace. The name of a repository must be unique in that namespace.

GitHub enterprises

In GitHub, an enterprise is a container for multiple organizations. Enterprises are not namespaces – the organization names must still be unique. Enterprises have a URL slug that is used to refer to the enterprise. The URL to your enterprise will look like this:

https://github.com/enterprises/<enterprise-slug>

If you own an organization that is paid by invoice, then you can upgrade to an enterprise...