National:
Brands and Their Companies - via Gale Directory Library database
LexisNexis Directory of Corporate Affiliations (within Nexis Uni) (select "company dossier" from Menu)
Reference USA - 80 million businesses -- also includes module "New Businesses" (of about 4 million companies). Alternate name: Data Axle.
Thomas Register (also microfilm, offsite - Library Services Center - from 1905-2006 - TS199.T45)
Ward's Business Directory of U.S. Private and Public Companies - 100,00 companies - via Gale Directory Library database
Local and State:
Corporation Search (GA Secretary of State website) Site requires setting up free account
Mergent Intellect - More than 30 million companies worldwide
Reference USA - 80 million businesses (can search by zip, county, MSA, state). Alternate name: Data Axle.
New Businesses module - about 4 million companies
International:
Mergent Intellect - More than 30 million companies worldwide
Mergent Online - public companies worldwide; major private companies worldwide
Canadian Businesses - 2 million companies (access via Reference USA platform)
Nexis Uni - Company Dossier. Includes many countries (but, limited search capabilities).
