236210 Industrial Building Construction

236220 Commercial and Institutional Building Construction

237130 Power and Comm. Line and Related Structures Construction 488111 Air Traffic Control

488119 Other Airport Operation

332000 Fabricated Metal Product Manufacturing

541370 Surveying and Mapping (non-Geophysical) Services

541330 Engineering Services

541511 Custom Computer Programming Services

541512 Computer Systems Design Services

541513 Computer Facilities Management Services

541519 Other Computer Related Services

561210 Facilities Support Services

238910 Site Preparation Contractors

541360 Geophysical Surveying and Mapping Services

541611 Administrative Mgt and General Mgt Consulting Services