This document provides information comparing and contrasting Max/MSP and Pd (Pure Data) across 20 topics. It discusses differences in pricing, operating systems supported, GUI, data types, synthesis techniques, signal routing, libraries for video and 3D graphics, mobile support, integration with other apps like Arduino, and more. It also addresses common questions about Pd related to performance, resources for learning, and connections to other domains like networking, serial ports, and programming languages.