Look more closely. Does it say "AFF" perhaps? That means "above finished floor".
What does KS mean on a floor plan? Knee Space
"DB" on a floor plan commonly stands for "dining room" or "dining area." It indicates the space in the floor plan designated for dining activities.
Floor plan mean Scottish plan. It shows the distance of room from the floor and physical appearance of room walls and all other features of rooms.
main panel
Water heater
poo extra
standard tile
Pulte Planning Center
"K.S." on a floor plan most likely stands for kitchen sink, indicating the location where the kitchen sink will be placed.
Ceramic Tile Wall.
Work in Revision. This means that this area of the drawing may change.
warming oven ... only on a fancy floor plan!