This article is from the Traditional Siamese Breed FAQ, by Laura Gilbreath email@example.com.
The Traditional Cat Association (TCA)
The United Feline Organization (UFO)
Cat Fancier's Federation (CFF) - provisional status as a new breed.
Some breeders chose not to follow the modern standard, so small
numbers of them are still bred and registered as Siamese in the
American Cat Association (ACA)
American Cat Fanciers Association (ACFA)
Cat Fanciers' Association (CFA)
Cat Fanciers' Federation (CFF)