| National Security in Patuxent River, MD (11) | Federal Government - National Security in Patuxent River, MD (3) |
| Aviation Consulting in Patuxent River, MD (2) | Credit Unions in Patuxent River, MD (2) |
| Government Offices in Patuxent River, MD (2) | Restaurants in Patuxent River, MD (2) |
| Schools - Universities & Colleges Academic in Patuxent River, MD (2) | Aircraft Schools in Patuxent River, MD (1) |
| Aircraft Servicing & Maintenance in Patuxent River, MD (1) | Business Services in Patuxent River, MD (1) |
| Cleaners in Patuxent River, MD (1) | Computer Software in Patuxent River, MD (1) |
| Construction Management in Patuxent River, MD (1) | Controls Control Systems Regulators in Patuxent River, MD (1) |
| Data Processing Service in Patuxent River, MD (1) | Defense Contract Audit Office in Patuxent River, MD (1) |
| Engineers - Consulting in Patuxent River, MD (1) | Engines - Gasoline in Patuxent River, MD (1) |
| Environmental & Ecological Services in Patuxent River, MD (1) | Executive Office in Patuxent River, MD (1) |
| Federal Government - General Offices in Patuxent River, MD (1) | Gasoline & Oil - Wholesale in Patuxent River, MD (1) |
| General Contractors in Patuxent River, MD (1) | General Hospital in Patuxent River, MD (1) |
| Hospitals in Patuxent River, MD (1) | Hotels And Motels in Patuxent River, MD (1) |
| House Construction Contractors in Patuxent River, MD (1) | Interior Decorators Design & Consultants in Patuxent River, MD (1) |
| Landscape Contractors in Patuxent River, MD (1) | Leasing Service in Patuxent River, MD (1) |
| Libraries - Institutional in Patuxent River, MD (1) | Libraries - Public in Patuxent River, MD (1) |
| Lighting Consultants in Patuxent River, MD (1) | Orchestras & Bands in Patuxent River, MD (1) |
| Post Offices in Patuxent River, MD (1) | Recruiting - Us Armed Forces in Patuxent River, MD (1) |
| Search Detection Nav Systs Instr (Mfrs) in Patuxent River, MD (1) | Sports Medicine & Injuries in Patuxent River, MD (1) |
| Transportation in Patuxent River, MD (1) | Transportation Services in Patuxent River, MD (1) |
| Travel Agencies & Bureaus in Patuxent River, MD (1) | Truck Renting & Leasing in Patuxent River, MD (1) |
| Wallpapers & Wallcoverings - Installation in Patuxent River, MD (1) |
