This document discusses e-commerce, specifically business-to-business (B2B) e-commerce. It defines key terms like e-business, e-commerce, and discusses the differences between business-to-consumer (B2C) and B2B models. The document also summarizes that B2B spending is growing significantly and projected to reach over $1 trillion by 2003 in the US. Several industries are highlighted as being early adopters of B2B solutions like aerospace/defense, electronics, and chemicals. Factors that can help B2B e-marketplaces succeed are also discussed.