Electronic systems designers have never had as many choices as they have now in functional modules or boards for their embedded electronics needs. Hundreds of suppliers worldwide specialize in commercially available, off-the-shelf products. Combined, they offer thousands of products. The well-informed designer can shop around for functional modules and boards in a huge array of form factors, performance levels, capabilities and feature options. It is a dramatic change from the days of build-your-own to today’s vast array of off-the-shelf solutions.