A Shingle

1. A small, thin piece of building material, often with one end thicker than the other, for laying in overlapping rows as a covering for the roof or sides of a building.
2. A rectangular piece of steel obtained by means of a shingling process involving hammering of puddled steel.
3. A small signboard designating a professional office; this may be both a physical signboard or a metaphoric term for a small production company (a production shingle).