- Computerized controls installation (2)
- Energy management controls (2)
- Environmental system control installation (1)
- Communications specialization (10)
- Cable television installation (3)
- Sound equipment specialization (4)
- Access control systems specialization (1)
- Closed circuit television installation (1)
- Fire detection and burglar alarm systems specialization (21)
- Electrical work, nec (2)
- Banking machine installation and service (1)
- Computer installation (4)
- General electrical contractor (7)
- Lighting contractor (1)