| Business | Phone |
| M Technologies Inc 440 Horsham Rd, Horsham 19044 | (215) 773-0250 |
| Electronic Display Application 121 Witmer Rd, Horsham 19044 | (215) 675-1700 |
| Frederic R Harris Inc 723 Electronic Dr, Horsham 19044 | (215) 657-3475 |
| Knudsen Engineering 955 Horsham Rd # 301, Horsham 19044 | (215) 674-8940 |
| Trefz Consulting Engineers 601 Dresher Rd # 275, Horsham 19044 | (215) 442-9480 |
| Pragma Corp 110 Gibraltar Rd, Horsham 19044 | (215) 773-9900 |
| Materials Sciences Corp 181 Gibraltar Rd, Horsham 19044 | (215) 542-8400 |