| Computer Related Services in Herndon, VA (130) | Computers - System Designers & Consultants in Herndon, VA (121) |
| Business Consulting Services in Herndon, VA (113) | Business Construction Services in Herndon, VA (100) |
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| Accountants in Herndon, VA (48) | Prepackaged Software Services in Herndon, VA (42) |
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| Child Day Care Services in Herndon, VA (37) | Real Estate Agent in Herndon, VA (37) |
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| Beauty Shop in Herndon, VA (31) | House Construction Contractors in Herndon, VA (31) |
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| Automotive Repair & Service in Herndon, VA (16) | Cleaners in Herndon, VA (16) |
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| Child Care Service in Herndon, VA (15) | Dentists in Herndon, VA (15) |
| Gifts Shop in Herndon, VA (15) | Computer Systems Design in Herndon, VA (14) |
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| Cellular Telephones (Services) in Herndon, VA (11) | Chiropractor's Office in Herndon, VA (11) |
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| Subdivider Developer Nonresidential Construction in Herndon, VA (11) | Travel Agencies & Bureaus in Herndon, VA (11) |
