9O

9O or 9-O may refer to:

• 9O, IATA code for National Airways Cameroon
• 9°, an abbreviation for ninth in some languages
• Grêmio Atlético do 9° Regimento; see Grêmio Atlético Farroupilha
• 9O–9T, the ITU prefix codes for Democratic Republic of the Congo
• 9O, squadron code for No. 44 Maintenance Unit; see List of RAF Squadron Codes

See also

• 9°
• O9 (disambiguation)
• 90