| Business | Phone |
| G C Technologies 2621 Barrington Ct, Hayward 94545 | (510) 293-1212 |
| Optic Layer Corp 31031 Huntwood Ave, Hayward 94544 | (510) 489-9988 |
| Glimmerglass 26142 Eden Landing Rd, Hayward 94545 | (510) 780-1800 |
| Wavefront Technologies 2560 Barrington Ct, Hayward 94545 | (510) 887-8780 |