Information for Exporters 

A BASIC GUIDE TO EXPORTING

Trade Finance Guide

ITA's  Trade Information Center (TIC) provides 
Foreign Tariff, Tax, and Customs Information  and 
other assistance and counseling to exporters.

GLOBUS / NTDB   National Trade Data Bank - Foreign market informaton

U.S. Customs  Importing and exporting procedures and information.

NAFTA Rules of Origin.

Schedule B  Classification of U.S. exports. Searchable database.

Harmonized Tariff Schedule (HS)   Classification of U.S. imports, in .PDF files.