Abstract: A decision tree processing system comprises non-transitory data storage configured to store a target data stream and a hardware processor in communication with the non-transitory data storage. The hardware processor can be programmed to access the target data stream, apply a decision tree to at least a portion of the target data stream, and generate a predicted outcome based at least partly on the applied decision tree. The decision tree can comprise a question set that is applied to the target data stream to generate a set of answers that are used at least partly to generate the predicted outcome. In various implementations, the decision tree processing system can be applied to geographic information services, prescription medication prior authorizations, or the Internet of Things.