| Business | Phone |
| Bauer Consulting Enterprises 363 White Swan Way, Langhorne 19047 | (215) 860-6390 |
| Unitech Engineers Inc 654 Woodbourne Rd, Langhorne 19047 | (215) 752-2240 |
| Robert Pfeilsticker 118 Shady Brook Dr, Langhorne 19047 | (215) 860-3738 |
| Mc Knight Assoc Inc 340 E Maple Ave # 106a, Langhorne 19047 | (215) 750-9611 |