title: 3O
text: # 3O
  
  3O or 3-O may refer to:
  
  * 3J, IATA code for Jubba Airways
  * 3O, IATA code for Air Arabia Maroc
  * 3o Sector, see Tertiary sector of the economy
  * 3-O-sulfation, a phenomenon occurring in Heparan sulfate
  