There has bean increasing interest in the use of and methods of generating high magnetic fields, which has been further stimulated by the discovery of hard superconductors. It is technically feasible but likely to be very costly to generate steady magnetic fields of about 400 kiloOersteds using conventional means. The use of superconductors seems limited, on thermodynamical grounds, with known materials to fields up to about 220 kiloOersteds. Beyond about 450 kiloOersteds the pulsed field technique will remain the only possible one for a long time to come. The pulses shorten in duration as the field intensity increases. Already fields of about 107Oersteds can be produced lasting for about a microsecond.