What were the major domains? List all.

In the context of Go development, large domains are usually associated with the application's business logic and can include areas such as:

• Users and Authentication (User Management)
• Orders and Payment (Order Processing, Payment)
• Inventory and Warehouse (Inventory Management)
• Logistics and Delivery (Logistics)
• Reports and Analytics (Reporting, Analytics)
• Notifications and Communications (Notifications, Messaging)

Each large domain is typically organized into a separate package or module with clearly defined interfaces and business rules. This helps keep the code clean and scalable.