Two Delphi studies were conducted by the Ethics and Equity Committee of the International Council for Computers in Education (ICCE) to obtain the opinions of experts on areas that should be covered by ethical guides for the use of computers in education and for software development, and to develop a model code of ethics for each of these areas. Conducted in 1984, the first study used two populations, a Delphi process panel of 19 nationally recognized experts who identified guidelines, and a sample of randomly selected school administrators who were asked to rate the appropriateness of these guidelines for inclusion in a code of ethics for computer use in education. The seven members of the ICCE Ethics and Equity Committee, who represented Israel, Canada, England, and a cross-section of the United States, acted as the Delphi panel for the second study, which focused on the refinement of the guidelines developed by the first one. The Delphi instrument was found to be an appropriate technique to compile the principles for the two codes, which were validated both by practitioners and the international Ethics and Equity Committee. It is noted that issues related to awareness and implementation of the code still need to be addressed by the committee. The code for computer use addresses issues related to curriculum, access to computers, software, teachers, future impact/consequences, privacy/confidentiality, students, other constituents, computer applications, quality, and school organization. The code for software development covers issues related to software, hardware, and overlapping conduct between the user and the developer. Copies of both codes are included as well as an eight-item reference list. (RP)