An early storage devICe that used tensioned wires of nICkel alloy carrying longitudinal waves produced and detected electromagnetICally. They had better storage behaviour than mercury delay lines. [H. Epstein and O.B. Stram, "A High Performance MagnetostrICtion-SonIC Delay Line," Transactions, Institute of Radio Engineers, Professional Group on UltrasonIC Engineering, 1957, pp. 1-24]. (2002-11-08)