| Business | Phone |
| Ampex Corp Regional Office/Serv 4130 Linden Ave # 150, Dayton 45432 | (937) 254-6101 |
| Curtiss-Wright Controls Embed 4126 Linden Ave, Dayton 45432 | (937) 252-5601 |
| Drs Engineering Dev Labs Inc 4391 Dayton Xenia Rd, Dayton 45432 | (937) 429-7408 |
| Tabtronics Inc 2153 Winners Cir, Dayton 45404 | (937) 222-9969 |
| Stegmann Inc 7496 Webster St, Dayton 45414 | (937) 454-1956 |
| Hofstetter Co 1250 W Dorothy Ln # 313, Dayton 45409 | (937) 296-1010 |
| Jemtec Electronics Corp 1901 E 5th St, Dayton 45403 | (937) 254-2671 |
| Projects Unlimited Inc 3680 Wyse Rd, Dayton 45414 | (937) 890-1918 |
| Original Systems 72 Westpark Rd, Dayton 45459 | (937) 435-9768 |
| Pave Technology Co 2751 Thunderhawk Ct, Dayton 45414 | (937) 890-1592 |