June 23, 2019
AWS Organizations Terminology and Concepts Organization An organization is the entity that you create to consolidate your AWS accounts
Root The root is the parent container that is automatically created when you create an organization. Currently, you can only have one root.
Organizational Unit (OU) An organizational unit is a container for accounts within a root. You can create a hierarchy by creating an OU within an existing OU. You can then add AWS accounts to an OU.