FI
FI commonly refers to Finland or the Finnish language, financial institutions, and financial intelligence, and is occasionally used as a shorthand for “for in” in programming.
Medical
Miscellaneous
Farm Information
Femmes Invisible
Fairy Intelligence
Functional Integration
For It
Fourth International
Film Industry
Forget It
for in
Governmental
Financial Intelligence
First Initial
Fee Index
Fuel Injection
Field Intelligence
Fundamental Issue
Field Investigation
Fuel Ignition
Fault Identification
Flight Instrumentation
Formal Inspection
Foreign Intelligence
Franklin Institute
International
Academic & Science
Filterability Index
Faraday Isolator
Finite Information
Fractional Integral
First Inversion
Fizicheskii Institut, Moscow