ABSTRACT
If the field of Human Factors in Computer Systems is to be a success it must develop design principles that are useful, principles that apply across a wide range of technologies. In the first part of this paper I discuss some of the properties that useful principles should have. While I am at it, I warn of the dangers of the tar pits and the sirens of technology. We cannot avoid these dangers entirely, for were we to do so, we would fail to cope with the real problems and hazards of the field.
