A taxonomy of Internet applications has been created to describe the use of the Internet for project management communication. It is based on the technological characteristics of Internet applications, the requirements of project management communication, and the organizational issues associated with using Internet applications. Its dimensions are the sender/receiver synchronization and the relationship between the number of senders and receivers. The taxonomy is populated with six Internet applications that are used commonly in project management communication. The taxonomy is presented as an aid to understanding the capabilities and limitations of Internet applications for different types of project management communication.