Electronic Mail (e-mail)
First Wave: Email was a tool for relatively unstructured communication.
Second Wave: Sellers are using e-mail as an integral part of their marketing and customer contact strategies.
Digital Products
First Wave: Sale of digital products was fraught with difficulties. Music recording industry was unable to devise a way to distribute digital music on the Web. This created an digital piracy environment, which lead to theft of musical artists’ intellectual property.
Second Wave: Sale of digital products was more legal in its distribution of music, video, and other digital products on the Web.