Tel Tech Plus

236210 - Industrial building construction

236220 - Commericial and institutial buidlding construction

237130 - Communication line construction/installation

237990 - Other heavy and civil engineering construction

238210 - ISP/OSP design/engineering/installation/ construction and electrical

238990 - All other specialty trade contractor

541330 - Engineering services

541519 - Other computer related services

541618 - Other management consulting services

561621 - Security system services (except locksmiths)