Prediction through modelling forms the basis of engineering design. The computational power at the fingertips of the professional engineer is increasing enormously and techniques for computer simulation are changing rapidly. Engineers need models which relate to their design area and which are adaptable to new design concepts. They also need efficient and friendly ways of presenting viewing and transmitting the data associated with their models. The International Journal of Numerical Modelling: Electronic Networks Devices and Fields provides a communication vehicle for numerical modelling methods and data preparation methods associated with electrical and electronic circuits and fields. It concentrates on numerical modelling rather than abstract numerical mathematics. Contributions on numerical modelling will cover the entire subject of electrical and electronic engineering. They will range from electrical distribution networks to integrated circuits on VLSI design and from static electric and magnetic fields through microwaves to optical design. They will also include the use of electrical networks as a modelling medium. PRINCIPAL TOPICS Electromagnetic field modelling from d.c. to optical frequencies Modelling of information networks analogue and digital circuits power distribution Modelling of solid state devices electronic tubes electrical components Moving boundary problems coupled problems Network modelling energy and moment methods element and ray methods graphs Pre- and post-processing of data In order to maintain the Journal's high standards papers will be sent to at least two referees for peer review and in the event of disagreement will be sent to a third reviewer - usually a member of the Editorial Board - for arbitration.