title: F91
text: # 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:
  
  