Computer methods in radiation protection as viewed by a user

Five elements in computer methods as applied to radiation protection are identified and discussed: the user, from the person who never touches a keyboard to the person who has never made a fluence measurement; the problem, analytical, iterative or Monte Carlo; the objective, for multiple engineering runs, for single in-depth studies or for program development; the interface, or how to get the data in and the answer out; the solution, or is this really the right answer?. (0 refs).