Gateway
The v3 consolidation merged the table to a small set of stable, user-facing core entities. The mapping from entity to backend services is internal and managed by the gateway. From the customer's perspective, the entities mirror what they see in the UI: a "resource" is a thing on the Resources page; a "schedule" is a thing on the Schedules page. No mental translation required.
Read the term in context.
Each row is a lesson that uses this term. The lesson where it first appears is the canonical definition.