JA - Electronics and optoelectronics

JT - Propulsion, engines and fuels

JB - Sensors, detecting elements, measurement and regulation

JQ - Machinery and tools

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

JR - Other machinery industry

JD - Use of computers, robotics and its application

JO - Land transport systems and equipment

JC - Computer hardware and software

JN - Civil engineering

JS - Reliability and quality management, industrial testing

JP - Industrial processes and processing

JJ - Other materials

JU - Aeronautics, aerodynamics, aeroplanes

JG - Metallurgy, metal materials

JI - Composite materials

JK - Corrosion and material surfaces

JM - Structural engineering

JH - Ceramics, fire-proof materials and glass

JL - Fatigue and fracture mechanics

JF - Nuclear energy

JY - Firearms, ammunition, explosives, combat vehicles

JV - Cosmic technologies

JW - Navigation, connection, detection and countermeasure

BL - Plasma physics and discharge through gases

BC - Theory and management systems

BM - Solid-state physics and magnetism

BK - Liquid mechanics

BH - Optics, masers and lasers

BI - Acoustics and oscillation

BB - Applied statistics, operational research

BO - Biophysics

BJ - Thermodynamics

BG - Nuclear, atomic and molecular physics, accelerators

BE - Theoretical physics

BA - General mathematics

BN - Astronomy and celestial mechanics, astrophysics

BF - Elementary particle theory and high energy physics

BD - Information theory

AK - Sport and leisure time activities

AM - Pedagogy and education

AH - Economics

AN - Psychology

AB - History

AC - Archaeology, anthropology, ethnology

AE - Management, administration and clerical work

AL - Art, architecture, cultural heritage

AQ - Safety and health protection, safety in operating machinery

AG - Legal sciences

AP - Municipal, regional and transportation planning

AA - Philosophy and religion

AD - Political sciences

AF - Documentation, librarianship, work with information

AJ - Literature, mass media, audio-visual activities

AI - Linguistics

AO - Sociology, demography

FH - Neurology, neuro-surgery, nuero-sciences

FP - Other medical fields

FL - Psychiatry, sexology

FD - Oncology and haematology

FE - Other fields of internal medicine

FI - Traumatology and orthopaedics

FA - Cardiovascular diseases including cardio-surgery

FB - Endocrinology, diabetology, metabolism, nutrition

FJ - Surgery including transplantology

FQ - Public health system, social medicine

FS - Medical facilities, apparatus and equipment

FR - Pharmacology and apothecary chemistry

FG - Paediatrics

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

FN - Epidemiology, infection diseases and clinical immunology

FM - Hygiene

FC - Pneumology

FK - Gynaecology and obstetrics

FO - Dermatology and venereology

ED - Physiology

EB - Genetics and molecular biology

EF - Botany

EC - Immunology

EI - Biotechnology and bionics

EE - Microbiology, virology

EA - Morphology and cytology

EG - Zoology

EH - Ecology - communities