The use of information technology in a peritoneal dialysis service, as in any facility, poses the problem of the choice of the data to be stored. It is important to define the whole range of information which may be of use and to assess the costs and benefits involved. These will depend on how complete and reliable the stored information is, how well the management process (filing and processing) is integrated with its day to day use by the Department. It is essential to both safeguard work efficiency and guarantee processing which will be useful in routine operations, including checking the quality of work carried out, and in study and research.