| Business | Phone |
| Npd Research 900 W Shore Rd, Port Washington 11050 | (516) 625-0700 |
| Datamatics 85 Old Shore Rd, Port Washington 11050 | (516) 767-0440 |
| Sandata Technologies Inc 26 Harbor Park Dr, Port Washington 11050 | (516) 484-4400 |
| Kliger-Weiss Infosystems Inc 99 Seaview Blvd, Port Washington 11050 | (516) 621-2400 |