| Business | Phone |
| J & J Audio Svc 1427 Nantucket Dr, Richardson 75080 | (972) 437-1032 |
| Visual Application Inc 1701 N Greenville Ave 1118, Richardson 75081 | (972) 235-5353 |
| Y2k Audio Design 532 E Tyler St, Richardson 75081 | (972) 680-2001 |
| Y2k Audio Design Inc 6901 Chevy Chase, Richardson 75081 | (972) 680-2001 |