1, The full form of FCB is Football Club of Barcelona. It’s used on Sports & Games ,Football in Spain

Futbol Club Barcelona, English: Football Club Barcelona), also known as Barcelona and familiarly as Barça, is a professional football club, based in Barcelona, Catalonia, Spain. Founded in 1899 by a group of Swiss, English and Catalan footballers led by Joan Gamper, the club has become a symbol of Catalan culture and Catalanism, hence the motto “Més que un club” (English: More than a club). The official Barça anthem is the “Cant del Barça” written by Jaume Picas and Josep Maria Espinàs.

2, The full form of FCB is File Control Block. It’s used on Computing ,Data Storage in Worldwide

File Control Blocks (FCB), sometimes referred to as file descriptor, is a data structure that hold information about a file. When an operating system needs to access a file, it creates an associated file control block to manage the file. The structure of the file control block differs between operating systems, but most file control blocks include the following parts like Filename, Location of a file on secondary storage, Length of file, Date and time or creation or last access, etc.

3, The full form of FCB is Fecal Coliform Bacteria. It’s used on Medical ,Viruses & Bacteria in Worldwide

A fecal coliform (sometimes faecal coliform) is a facultatively-anaerobic, rod-shaped, gram-negative, non-sporulating bacterium. Fecal coliforms are capable of growth in the presence of bile salts or similar surface agents, are oxidase negative, and produce acid and gas from lactose within 48 hours at 44 ± 0.5°C