Class O
Class O stands for:
- Class O , EC vehicle class, see EC vehicle class #Class O
- Class O , soil type, see soil type #Class O - Terrestrial raw soils
- Class O (potters) , Attic-Greek ceramic artist group, see list of Greek potters and vase painters / O # artist groups
- Spectral class O , class of stars, see spectral class # classification
See also:
- O class
- Inland waterway #Class 0 (class zero ), waterway class
