Commercial plywood is commonly used for making office and house furniture and interior decoration. Commercial plywood is best suited for interior decor uses. Commercial plywood is mostly used for the furniture that not get wet.
Plywood (be it any grade or type) is typically made by gluing several veneer sheets together. The veneers sheets are manufactured from logs of wood obtained from different tree species. You therefore will find every commercial plywood made from different species of veneer.