U. S. Small Business Administration (SBA) 
SBA App for iPhone 
Information and services provided by the federal government dealing with business development, financial assistance, taxes, and regulations.
Government Procurement & Sales
Federal Business Opportunities 
One-stop online gateway offering public access to government-wide Federal procurement opportunities exceeding $25,000.
Government Shopping and Auctions  (USA.gov for Citizens)
Buy new, seized, and surplus merchandise from the U.S. Federal government.
North American Industry Classification System (NAICS) 
The industry classification system used by the statistical agencies of the United States (replaced SIC in 1997).
Standard Industrial Classification Manual (SIC) 
Search the 1987 version SIC manual by keyword, access descriptive information for a 4-digit SIC, and examine the manual structure.
Patents & Trademarks
U.S. Patent and Trademark Office
Trademarks and patent information and forms.
Search for a Trademark
Search trademarks, check trademark status, or apply for a trademark online.
Business and economic statistics  produced by the U.S. Government.