F91
# F91

F91 may refer to :

* F91 Dudelange, a football club, based in Dudelange in southern Luxembourg
* Mobile Suit Gundam F91, a 1991 animated film
* HMS Brazen (F91), a 1981 British Royal Navy Type 22 frigate
* HMS Murray (F91), a British Royal Navy Blackwood class second-rate anti-submarine frigate
* Republic XF-91 Thunderceptor, a rocket-jet hybrid interceptor
* Casio F-91W, a common and inexpensive digital watch, claimed by some to be associated with terrorism
* The McCarthy 91 function, a recursively defined mathematical function

and also:

