转自“Microsoft .NET Architecting Applications for the Enterprise”

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Microsoft, however, recognizes four types of architects: enterprise architect (EA),
infrastructure architect (IA),
technology-specific architect (TSA),
and solution architect (SA).

The list is taken from the job roles recognized by the Microsoft Certified Architect Program. You can read more about the program and job roles at http://www.microsoft.com/learning/mcp/architect/specialties/default.mspx.