The document discusses various e-business models like virtual e-tailers, bricks and clicks retailers, and brick-and-mortar retailers. It also discusses applications of e-business like internal business systems, enterprise communication and collaboration tools, electronic commerce, e-procurement and how it differs from traditional procurement. Other topics covered include electronic trading, auctions, electronic data interchange (EDI) and how it facilitates exchange of data between companies, and advantages and disadvantages of EDI.