| Business | Phone |
| Darrah Electric Co 5914 Merrill Ave, Cleveland 44102 | (216) 631-0912 |
| Insight Electronics 9665 Rockside Rd, Cleveland 44125 | (216) 520-4333 |
| National Semiconductor Corp 2000 Auburn Dr, Cleveland 44122 | (216) 378-7757 |
| Linear Technology Inc 7550 Lucerne Dr, Cleveland 44130 | (440) 239-0817 |