PSC NAICS rankings
Top NAICS paths for PSC 6665.
Use this ranking when the research starts with PSC 6665 and you want the strongest industry-code pages attached to HAZARD-DETECTING INSTRUMENTS AND APPARATUS before moving into deeper intersections.
PSC NAICS rankings
Top NAICS paths
These PSC-scoped rankings are useful when you want a cleaner entry point than the full code page and a faster pivot into geography or industry-lane research.
NAICS 541990
1 visible recipients · All Other Professional, Scientific, and Technical Services
NAICS 334517
1 visible recipients · Irradiation Apparatus Manufacturing
NAICS 561110
1 visible recipients · Office Administrative Services
NAICS 541512
1 visible recipients · Computer Systems Design Services
NAICS 541712
1 visible recipients · Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)
NAICS 541513
1 visible recipients · Computer Facilities Management Services
NAICS 334511
1 visible recipients · Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
NAICS 483114
1 visible recipients · Coastal and Great Lakes Passenger Transportation
NAICS 541620
1 visible recipients · Environmental Consulting Services
NAICS 811310
1 visible recipients · Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
Other PSC ranking views
Move around PSC 6665
Use sibling ranking layers when you want to stay inside the same service lane but switch between geography and industry analysis.
Directory graph
Move into full directory hubs
Use the PSC-specific ranking page as a shortcut, then move back into the broader PSC, state, NAICS, and top-list hubs when you want wider browse coverage.