| Business | Phone |
| Atlantic Business Systems Inc 40 Constance Ct, Hauppauge 11788 | (631) 582-1400 |
| Manchester Technologies Inc 160 Oser Ave, Hauppauge 11788 | (631) 951-8100 |
| Compusa 526 Route 111, Hauppauge 11788 | (631) 366-6100 |
| Cpi 295 Oser Ave, Hauppauge 11788 | (631) 231-5550 |
| Dimension Data Isg 110 Parkway Dr S, Hauppauge 11788 | (631) 543-6100 |
| Numeric Computer Systems Inc 275 Oser Ave, Hauppauge 11788 | (631) 486-9000 |
| Ion Computer Systems Inc 30 Oser Ave, Hauppauge 11788 | (631) 342-1608 |
| Sirius Computer Solutions 300 Motor Pkwy, Hauppauge 11788 | (631) 439-6881 |
| Specialty Computers 156 John St, Hauppauge 11788 | (631) 979-0001 |