Nothing exists in a vacuum. Everything connects to a larger whole. Whenever you're making something, figure out which levels you're working at:
| Object: a specific thing. |
| Interface: a point where a user affects that thing. |
| Location: a particular place or position. |
| Journey: the steps in or between locations. |
| Structure: a configuration of objects and locations. |
| System: a set of structures working together. |
| Ecosystem: a collection of related systems. |