The commercial plywood is the standard plywood that you can access in any hardware store when you ask for plywood. The commercial plywood is usually a grade of plywood that is quite cheap because it is manufacturer out of veneers or slices of woods called the ply which is glued or bonded together under high pressure. The commercial plywood is also termed Major plywood where Major denotes moisture resistant. This means that the plywood can withstand a fair amount of dampness, humidity, and moisture. The commercial plywoods are made with different types of veneers that are popular in a particular geographical location. You have commercial plywood made of Rubber veneers in the south whereas, you have veneers made of eucalyptus in some other place.