Happy birthday, Apple! Today you're 40. To celebrate, we've compiled a list of the company's 15 most pivotal products, starting with the design of the iPhone and ending with the San Bernardino iPhone. But to see all of Apple's products from the past four decades, at once, look to "The Insanely Great History of Apple 3.0" ($90)—a comprehensive visual overview of Apple's oeuvre, from the folks at Po