The document describes pcDuino, a $39 single board computer compatible with the Arduino ecosystem. It has 1GB RAM, 4GB flash storage, Gigabit Ethernet, and runs Linux and Android. The document outlines different pcDuino models and their specifications. It provides examples of programming pcDuino using languages like Scratch, C, Python, Go, and through IDEs like Arduino and Cloud 9. Accessories like shields can expand its functionality for hardware experiments.