Erosion prediction technologies have been a significant tool in soil conservation efforts in the United States for nearly three quarters of a century. These tools have provided a scientific, quantitative approach for selection of effective and efficient conservation and management systems to meet soil erosion goals for the wide range of climates, soils, topographies and land uses in the United States. The technologies have allowed land users to farm lands in a way that would sustain the inherent soil productivity. Erosion prediction technologies began modestly, with empirical relationships for slope and length effects on soil erosion being developed. The empirical technologies evolved by expanding earlier work to include allowable soil loss limits, cropping and management, and conservation practices effects. Shortly, soils were added to expand the evolving technologies. Then, efforts began to develop nationwide prediction technologies, first the Musgrave equation, then later the Universal Soil Loss Equation (USLE). Eventually, this empirical work evolved further into the Revised Universal Soil Loss Equation (RUSLE and RUSLE2).  The USLE and RUSLE have been applied on nearly every continent and have been the basis of technologies in many areas of the world. These technologies were user friendly, but also limited in their adaptability to meet changing needs. Computer technology had begun to deliver technology, and fundamental process based technology had been tested in various applications. This led to the development of the WEPP erosion prediction technology and a companion technology to predict wind erosion. The various technologies have became important in predicting water and soil quality. The future will bring greater integration of wind and water erosion prediction and user friendly technology for watershed applications. The list of scientists involved in developing erosion prediction technology are a virtual who’s who in soil and water conservation over the last 70 years.