| Business | Phone |
| Afeef Law Offices 1821 Walden Office Sq, Schaumburg 60173 | (847) 925-5130 |
| All American Semiconductor 1930 Thoreau Dr N, Schaumburg 60173 | (847) 303-1455 |
| Altera Corp 425 N Martingale Rd 1320, Schaumburg 60173 | (847) 240-0313 |
| Fairchild Semiconductor 1721 Moon Lake Blvd, Schaumburg 60194 | (847) 755-0500 |
| Heidenhain Corp 333 E State Pkwy, Schaumburg 60173 | (847) 490-1191 |
| Intel Corp 425 N Martingale Rd 1500, Schaumburg 60173 | (847) 706-5746 |
| Xilinx Inc 3100 W Higgins Rd 135, Schaumburg 60194 | (847) 230-6451 |
| Lattice Semiconductor Corp 10 N Martingale Rd 185, Schaumburg 60173 | (847) 619-0760 |