When searching for a company, you should keep in mind that a "business" may
be operating for profit or not. As some directories may differentiate
between the two, you may have less trouble tracking a company that
is not operating for a profit by checking sources that are focused
on this type of organization.
GuideStar: Non-Profit Organization Finder
GuideStar is a searchable database of more than 620,000 nonprofit organizations
in the United States.
The Foundation Directory
(*R-SIBL AS911 .A2.F65 or
Listing of American foundations and their fields.
Directory of Tax-Exempt Organizations
Annual publication which lists nonprofit organizations as defined by the
fact that they do not have to pay taxes as other businesses do.
The Foundation Center Library
79 Fifth Avenue New York, NY 10003 Tel: (212) 620-4230
The Center's mission is to foster public understanding of the foundation
field by collecting, organizing, analyzing, and disseminating information
on foundations, corporate giving, and related subjects.