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| Primary NAICS Code | Primary Industry | Working Business Activity |
| 561621 | Security Systems Services (except Locksmiths) |
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| NAICS Code 2 | Industry 2 | Working Business Activity |
| 238210 | Electrical Contractors and Other Wiring Installation Contractors |
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| NAICS Code 3 | Industry 3 | Working Business Activity |
| 541511 | Custom Computer Programming Services |
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| NAICS Code 4 | Industry 4 | Working Business Activity |
| 541512 | Computer Systems Design Services |
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| NAICS Code 5 | Industry 5 | Working Business Activity |
| 541513 | Computer Facilities Management Services |
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| Additional NAICS Codes |
| 238990;334290 |
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