AA - Philosophy and religion

AI - Linguistics

AL - Art, architecture, cultural heritage

AB - History

AM - Pedagogy and education

AO - Sociology, demography

AC - Archaeology, anthropology, ethnology

AD - Political sciences

AE - Management, administration and clerical work

AF - Documentation, librarianship, work with information

AG - Legal sciences

AH - Economics

AJ - Literature, mass media, audio-visual activities

AK - Sport and leisure time activities

AN - Psychology

AP - Municipal, regional and transportation planning

AQ - Safety and health protection, safety in operating machinery

BA - General mathematics

BB - Applied statistics, operational research

BC - Theory and management systems

BD - Information theory

BE - Theoretical physics

BF - Elementary particle theory and high energy physics

BG - Nuclear, atomic and molecular physics, accelerators

BH - Optics, masers and lasers

BI - Acoustics and oscillation

BJ - Thermodynamics

BK - Liquid mechanics

BL - Plasma physics and discharge through gases

BM - Solid-state physics and magnetism

BN - Astronomy and celestial mechanics, astrophysics

BO - Biophysics

CA - Inorganic chemistry

CB - Analytical chemistry, separation

CC - Organic chemistry

CD - Macromolecular chemistry

CE - Biochemistry

CF - Physical chemistry and theoretical chemistry

CG - Electrochemistry

CH - Nuclear and quantum chemistry, photo chemistry

CI - Industrial chemistry and chemical engineering

JA - Electronics and optoelectronics

JC - Computer hardware and software

JT - Propulsion, engines and fuels

JB - Sensors, detecting elements, measurement and regulation

JD - Use of computers, robotics and its application

JE - Non-nuclear power engineering, energy consumption and utilization

JF - Nuclear energy

JN - Civil engineering

JG - Metallurgy, metal materials

JH - Ceramics, fire-proof materials and glass

JI - Composite materials

JJ - Other materials

JK - Corrosion and material surfaces

JL - Fatigue and fracture mechanics

JM - Structural engineering

JO - Land transport systems and equipment

JP - Industrial processes and processing

JQ - Machinery and tools

JR - Other machinery industry

JS - Reliability and quality management, industrial testing

JU - Aeronautics, aerodynamics, aeroplanes

JV - Cosmic technologies

JW - Navigation, connection, detection and countermeasure

JY - Firearms, ammunition, explosives, combat vehicles

FA - Cardiovascular diseases including cardio-surgery

FB - Endocrinology, diabetology, metabolism, nutrition

FC - Pneumology

FD - Oncology and haematology

FE - Other fields of internal medicine

FF - ENT (ie. ear, nose, throat), ophthalmology, dentistry

FG - Paediatrics

FH - Neurology, neuro-surgery, nuero-sciences

FI - Traumatology and orthopaedics

FJ - Surgery including transplantology

FK - Gynaecology and obstetrics

FL - Psychiatry, sexology

FM - Hygiene

FN - Epidemiology, infection diseases and clinical immunology

FO - Dermatology and venereology

FP - Other medical fields

FQ - Public health system, social medicine

FR - Pharmacology and apothecary chemistry

FS - Medical facilities, apparatus and equipment