The operation of computer systems and their associated communications systems are central to the economies of the developed world. The social impact of this technology has been immense, changing the environment in which computers are used, and in doing so giving rise to questions of right and wrong. Moor defines computer ethics as:

'.... The analysis of the nature and the social impact of computer technology and the corresponding formulation and justification of policies for the ethical use of such technology.'

He uses the phrase 'computer technology' so as to take the subject matter of the field broadly to include computers and associated technology: including concerns about software as well as hardware and concerns about networks connecting computers as well as computers themselves.

Johnson defines the study of computer ethics as

'The study of the ethical questions that arise as a consequence of the development and deployment of computers and computing technologies. It involves two activities. One is identifying and bringing into focus the issues and problems that fall within its scope, raising awareness of the ethical dimension of a particular situation. The second is providing an approach to these issues, a means of advancing our understanding of, and suggesting ways of reaching wise solutions to these problems.'