This industry group includes establishments classified in the following industries: 54131, Architectural Services, 54132, Landscape Architectural Services, 54133, Engineering Services, 54134, Drafting Services, 54135, Building Inspection Services, 54136, Geophysical Surveying and Mapping Services, 54137, Surveying and Mapping (Except Geophysical) Services, and 54138, Testing Laboratories.