| Organization | — | Your account. Everything below is scoped to it. |
| FBO account | Organization | An account holder. Inventory is owned here. Each organization has one primary FBO account (isPrimary: true), created with the organization, which is the default inventory holder. |
| Product | — | Catalog entry. Every inventory item is an instance of a product. |
| Inbound shipment | FBO account | Items being sent to the vault. Creates inventory items when accepted. |
| Inventory item | FBO account | One physical item in the vault. |
| Transfer | Organization | Moves inventory items from one FBO account to another. |
| Outbound request | FBO account | A request to ship inventory items out. |
| Outbound shipment | FBO account | The carrier shipment created once a request is picked. |
| Return shipment | FBO account | Items coming back after an outbound shipment. Handled like an inbound shipment. |