Root
Home of the consolidated bill for all other accounts. Also contains the root “AWS organization” that applies service policies and security restrictions to all other accounts.
Audit
Consolidates all audit events across all accounts through write-only delegated permission to services such as CloudTrail running in every account.
Common
Hosts infrastructure shared by other accounts; includes ECR repositories for docker images, our primary storage for builds, and the storage + serving infra for cdn.coda.io