? Norman Dunbar is a retired Oracle Database Administrator. Norman has had a long-running relationship with Electronics since childhood and computers since the late 1970s, and the Arduino was a perfect marriage of the two interests. With a love of learning new things, and finding out how things work, examining and explaining the Arduino Language and the hardware became a bit of a hobby. As piles of notes expanded, and after the publication of his first book, Arduino Software Internals, he collected some more of his notes into another book.