| Business | Phone |
| Harita Infoserv Inc 165 Kirts Blvd 600, Troy 48084 | (248) 269-0600 |
| Virtual Services Inc 100 W Big Beaver Rd # 100, Troy 48084 | (248) 545-3100 |
| Unigraphics Solutions 1050 Wilshire Dr 250, Troy 48084 | (248) 712-2400 |
| Modern Technology Resources 130 Town Center Dr, Troy 48084 | (248) 544-2600 |