This document discusses online retailing and services. It provides an overview of Blue Nile, an online diamond retailer, and discusses how Blue Nile has built trust with customers and kept costs low. The document then covers several topics related to e-commerce, including analyzing the viability of online firms through strategic and financial analysis. It also discusses different business models for online retailing, including virtual merchants like Amazon, bricks-and-clicks retailers, and manufacturer-direct sellers. Major trends in various online service industries such as financial services, travel, and education are also summarized.