PI (Physik Instrumente) L.P. has introduced the E-709 piezo nanopositioning controller, which provides digital functionality for the price of analog, in the size of a paperback book. Fifth-order polynomial digital linearization ensures higher accuracy than analog, and two notch filters allow faster response and piezo operation at higher frequencies. A fast servo update rate ensures responsiveness. The digital-to-analog converter in-the-loop architecture guarantees positional stability. The system is supplied with USB, RS-232, real-time analog and transistor-transistor logic high-speed interfaces. Applications include biotechnology, nanotechnology, semiconductor technology, lithography and optics.