| Business | Phone |
| Estimation Inc 805 Barkwood Ct # L, Linthicum Hts 21090 | (410) 636-5680 |
| Lucent Technologies 1302 Concourse Dr # 300, Linthicum Hts 21090 | (410) 424-2700 |
| Mercury Computer 7353 Aviation Blvd, Linthicum Hts 21090 | (410) 691-5301 |
| Tondo Tech System Inc 803 Barkwood Ct # H, Linthicum Hts 21090 | (410) 789-4700 |