The pulsed wire discharge, as one of the well-developed pulsed power technologies, has been successfully applied to nanosize powder production. In the demonstration experiments, the discharge was carried out with the peak current of similar to 10 kA, the, pulse length of similar to 20 mu s, and the pulse energy of similar to 80 J. Nanosize powders of metals (AI, Fe, Cu, Mo, and ph), metal oxides (Al2O3, TiO2, Fe2O3, NiO, ZrO2, SnO2, and PbO), and metal nitrides (TiN ZrN, Ta2N) have been synthesized by pulsed discharge of metal wires in argon, oxygen, or nitrogen. The typical powder production rate was similar to 5 mg/pulse. The results of surface-area measurement have given the average powder sizes in the range of 20 similar to 70 nm, depending on the material of the ponder.