Initialism of Federal Capital Territory.

(computing) Initialism of file control block.

(soccer) Initialism of FC Barcelona, a famous Spanish sports club from Barcelona, best known for its football (soccer) section; from Catalan FCB (“Futbol Club Barcelona”).

Initialism of Friendship, Commerce, and Navigation (as in the title of an international treaty or convention)

(crystallography) Initialism of face-centered cubic.

Abbreviation of foolscap.

(US) Initialism of Federal Correctional Institutions.

(law) Initialism of Foreign Corrupt Practices Act.

(UK, soccer) Initialism of F.C. United of Manchester.

(telecommunications) Initialism of floating car data (“a method to determine the traffic speed on a road network”). / Initialism of feline cognitive dysfunction.