Building levels, also known as FLOORS, are the different levels of a building. They are typically numbered from the bottom up, with the ground floor being the lowest level and the highest floor being the topmost level. FLOORS can be divided into sub-levels, such as basements, mezzanines, and attics. FLOORS can also be divided into different types of rooms, such as bedrooms, bathrooms, kitchens, and living rooms. FLOORS can also be used to separate different types of businesses, such as retail stores, offices, and restaurants.