This document provides an introduction and literature review for a study on e-business models. The introduction defines e-business and e-commerce, and discusses the benefits of e-business. The literature review summarizes several past attempts to define and classify e-business models, including models focused on electronic markets, value creation, atomic structures, stages of e-commerce maturity, and different digital business models. The overall purpose is to conduct a comparative study of e-business models and the technologies that support them.