In addition to the changes within the main chapter content, we have also added two new features to each chapter—Green IT and Security Matters. Green IT presents environmental issues arising from the use of information systems. For example, in Chapter 4, we discuss the environmental impacts of online shopping. Security Matters presents some current issues and threats arising from the ubiquitous use of information systems. For example, in Chapter 5, we discuss how hacktivists challenged the extramarital dating website Ashley Madison.