Electronic systems are described including semiconductor circuitry characterized by first signals and all-metal circuitry characterized by second signals and comprising a plurality of transpinnors. Each transpinnor includes a network of thin-film elements. At least one thin-film element in each transpinnor exhibits giant magnetoresistance. Each transpinnor includes a conductor inductively coupled to the at least one thin-film element for controlling operation of the transpinnor. Interface circuitry connects the semiconductor circuitry to the all-metal circuitry and converts between the first signals and the second signals.