| Layer | Used For |
| Web Application | Public facing site used by the user. |
| WCF Service | Windows Communication Foundation (WCF) |
| Facade | Serves as a front-facing interface masking more complex underlying or structural code. |
| Business Object | Enable designers to design software in manageable pieces by breaking the business down into a modular form. |
| Data Access Object | Provides an abstract interface to some type of database. |
| Stored Procedure | Stored queries. |
| Database | Data repository. |
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