Whether you are installing fascia, exterior panels, siding, or cabinets, your project is going to need a lot of plywood. And, no doubt in your search for materials, you discovered that there are different types of it. Experts have told you that the best one to use is something called “MDO Plywood” (whatever that means) which only confuses you, leaving you in a guessing game of what MDO is and what it stands for (no, it’s not Multi-Dimensional Object).