Electronic commercial transactions over the Internet, or "e-commerce," have grown so fast over the last five years that many experts continue to underestimate its growth and development. Whether retail business-to-customer or business-to-business transactions, e-commerce is now a significant part of commercial transactions. In turn, policymakers both in the United States and abroad are likely to face increasingly complex issues of security, privacy, taxation, infrastructure development and other issues in 2001 and beyond. This report will be updated periodically.