FIS FFS.There is usually a modifier before FIS like FFIS or GDFIS
Fwiw in the eighties when talking about domestic races everyone I knew just said FIS as one syllable
Even in Japan it's pronounced "fis" rather than "eff eye ess". Although, the Japanese accent is "fisu" (フィス) because of the language characteristics.
Except the full name includes snowboarding now:
Is USA youssa?
Is UK yuk?
Is NBA ninba?
Is NHL nahill?
It is F I S not fiss
In Peru USA is pronounced OO-sa. Probably in many other Spanish speaking countries as well.Except none of those are easily pronounceable as a word. All of the below are typically pronounced as a word.
HIPAA
NASA
UNESCO
UNICEF