F89 or F-89 may be:

• F89 Minimi, an Australian produced version of the FN Minimi light machine gun
• F-89 Scorpion, an early American jet-powered fighter
• F89 strain, a mupirocin resistant strain of S.aureus
• Aradu (F89), a 1980 Nigerian frigate
• DKW F89, a 1950 compact front wheel drive saloon
• HMCS Prince David (F89), a 1929 Canadian National Steamships Canadian National Railway passenger liner
• HMS Battleaxe (F89), a 1977 British Royal Navy Type 22 frigate

and also :

• Unspecified disorder of psychological development ICD-10 code

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