Local and State:
Reference USA - 40 million US businesses (can search by zip, county, MSA, state)
also includes 2 modules: New Businesses ; Historical Busineses (most recent 10 years)
Mergent Intellect - more than 70 million US companies, plus more than 200 million global companies. Replaces D&B Million Dollar Database
PrivCo - 400,000 US private companies. Focus is on funding rounds; investors. Note: create individual account.
Corporation Search (GA Secretary of State website)
Ward's Business Directory of U.S. Private and Public Companies - via Gale Library Directory database
Atlanta Business Chronicle Book of Lists (December issue) - REFERENCE HF5068.A8 B665
Georgia Business Directory - offsite, Library Services Center - HF5056.G4 G46 - from 1989 to about 2016 (some gaps)
Georgia Manufacturers Register (offsite, Library Services Center -- HD9727.G4 G43 - library has from 1992-2003 (some gaps))
Official Georgia Manufacturers Directory (offsite, Library Services Center - REFERENCE HF5065.G4 H37)
Standard & Poor's Register of Corporations... (offsite, Library Services Center - REFERENCE HG4057.A4 )
Thomas Register, from 1905-2006 in microfilm - TS199.T45 - offsite, Library Services Center)
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Corporate Yellow Book (offsite, Library Services Center - REFERENCE HG4057.A15646)
D&B Business Rankings (offsite, Library Services Center - REFERENCE HG4057.A237)
D&B Consultants Directory (offsite, Library Services Center - REFERENCE HD69.C6 D86x)
D&B Industrial Guide (offsite, Library Services Center - REFERENCE TS203.D8)