G9

G9, G.IX, G09 or G-9 has several uses including:
* G9 (consortium), a name for a group of nine Australian internet providers
* G9 Crampon
* "G9" (Gloc-9 album), the debut album of Gloc-9
* G9 Hotel in Tallinn, Estonia
* G9 light, a lamp standard
* G9 star, a subclass of G-class stars
* Canon PowerShot G9, a digital camera
* County Route G9 (California)
* Gotha G.IX, a 1918 German bomber aircraft
* HMS G9, a British G class submarine and one of eight British submarines lost to "friendly fire" in World War I
* HMS Quilliam (G09), a 1941 British Royal Navy Q class destroyer
* Logitech G9, a gaming mouse with variable weight and sensitivity settingsand also :
* Air Arabia IATA airline designator
* Gaia Online donation item
* Gol Transportes Aéreos (Brazil) IATA airline designator
* Group 9 element of the periodic table
* NATO code for the Assistant Chief-of-Staff, CIMIC
* G09, Sequelae of inflammatory diseases of central nervous system code