Gypsum wall board is the outside layer on walls. It is smooth and painted. It is found on every finished wall.
Flooring
Flooring is placed on top of plywood subflooring. The three main types are hardwood, carpet, and tile. They are comfortable to walk on and are a key part of design.
Finished Carpentry
Finished carpentry is found on finished walls, fireplaces, and other places. They are meant to just look good. Baseboards are the most common type and are found on the bottom of walls.