These are the top online resources for doing business with the U.S. Government.
Migrate a CCR record to SAM
Registering New Companies in SAM
Acquisition Central
Links to many sites connected to government procurement
http://acquisition.gov
System for Award Management
https://www.sam.gov/
DIBBS Home Page
http://www.dibbs.bsm.dla.mil
DOD Procurement Statistics
http://www.dmdc.osd.mil/appj/dwp/stats_reports.jsp
Note: Security certificate has expired, and will result in an error message.
Federal Agency Procurement Forecasts
http://www.gsa.gov/portal/category/25544
D&B DUNS Number for Government Contracting
https://iupdate.dnb.com/iUpdate/viewiUpdateHome.htm
Federal Procurement Data System
https://www.fpds.gov/fpdsng_cms/index.php/en/
NAICS North American Industry Classification System-2007
http://www.census.gov/naics/2007/NAICODO7.HTM
National Stock Number (NSN) Search
http://www.dlis.dla.mil/webflis/pub/pub_search.aspx
SIC Standard Industrial Classification Code Search (OSHA Site)
http://www.osha.gov/pls/imis/sicsearch.html
Producer Price Index
http://www.bls.gov/ppi