This article describes the design and development of the International Test Commission's (ITC, this issue) Guidelines for Computer-Based and Internet-Delivered Testing. It examines some of the reasons why the ITC Council decided to invest in a program of research, consultation, and conferences designed to develop internationally agreed-on guidelines specifically aimed at computer- and Internet-based testing and describes the methodology involved in developing and disseminating the guidelines. Through a process of reviewing relevant literature and organizing conferences and wide consultations, a set of internationally recognized guidelines that highlighted good practice issues in computer/Internet testing were developed. The guidelines will raise awareness among all stakeholders in the testing process of what constitutes good practice in computer/Internet testing and can be used as a benchmark to set local standards and guidelines. Further issues are raised from the research, not least the need to ensure that with advances in technology and science comes the updating of training in tests and testing to keep up with such advances.