Scrum at Scale Guide
The Scrum@Scale Guide is the definitive guide to the Scrum@Scale framework/operating model. It contains the definitions of the components that make up Scrum@Scale. It contains the Scrum@Scale components and the definitions of the scaled Scrum roles, scaled Scrum events, and enterprise artifacts that compose the Scrum@Scale framework, as well as the rules that bind them together.
You can download the Scrum@Scale Guide here.
The current version of the Scrum@Scale Guide is v2.0. It was published in March 2020.