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9.14Another example: order processing

Consumers:

Web storefront
Mobile app
Partner portal

Business process:

submit order

Backend systems:

Salesforce
Inventory
Payment
ERP

Architecture:

Web Experience API ──┐
Mobile Experience API├→ Order Process API
Partner Experience API┘
                           │
              ┌────────────┼─────────────┐
              ↓            ↓             ↓
        Salesforce       Inventory     Payment
        System API       System API    System API

That's a very clean example for interviews.