NATIONAL SOURCES:
American Land Title Association(ALTA)
American Escrow Association (RESPA, IRS Reporting, 1031 Exchanges)
Department of Housing & Urban Development (HUD)
Fannie Mae and Freddie Mac(Government Mortgage Subsidiaries)
Mortgage Bankers Association of American(MBAA)
National Association of Realtors(NAR)
Agents National Title Insurance Company
Chicago Title Insurance Company
Commonwealth Land Title Insurance Company
Fidelity National Title Insurance Company
First American Title Insurance Company
Lawyers Title Insurance Corporation
Old Republic National Title Insurance Company
Security Union Title Insurance Company
Stewart Title Guaranty Company
TICOR Title Insurance Company
Transnation Land Title Insurance Company
There are several sources on the web where you can find more information about the title industry.