Classification
HDG - Psychology, psychiatry
12
AHP - Philosophy
7
DNC - Internet
6
AHPC - Ethics
5
YRA - Social studies
5
YRB - Social sciences, sociology
5
HDE - Neurology - general aspects
4
UED - Environmental policy
4
DKAE - Windows
3
DOQ - Programming languages - Internet
3
HAM - Medicine - theoretical and philosophical fundamentals
3
DSA - Computer graphics, image/photo editing
2
DTAD - MS - Word
2
DTAE - MS - Access
2
DUA - Text and document processing
2
HYE - Environmental health
2
YRC - Technology and society
2
AHK - Scientific work
1
AHNC - Journalism
1
AHO - linguistics, literary studies
1
AHPC - Ethics
1
AQBH - Reference guides - medicine
1
DTAF - MS - Excel
1
HAA - Medicine - reference books
1
HAD - Medicine - comprehensive works
1
HAE - Popular medicine
1
HDF - Brain - anatomy, function, disorders
1
HDH - Neuropsychology
1
HDS - Neurophysiology, neuroanatomy
1
HYB - Public health, health politics
1
HYH - Traumatology, emergency medicine, disasters
1
LGO - Sociobiology, ethology
1
LOD - Genetics - comprehensive works
1
LOH - Genetics - methods
1
LTE - Biotechnology - general aspects
1
MSH - Mathematical methods in life sciences
1
MWH - Statistics
1
MWHA - General aspects of statistics
1
MWHE - Quality examination, sampling theory, maximum likelihood estimation
1
MWHF - Experimental design, variance analysis
1
PEB - Electromagnetic fields
1
TAA - Engineering sciences - reference books
1
TIG - Reliability, safety, quality control
1
TNA - Nuclear engineering - general
1
UAU - Fire, fire protection, safety at the workplace, prevention of accidents
1
UCN - Environmental education
1
UKA - Environmental damage and energy production
1
UPW - Drinking water
1
YFD - Public service legislation
1
YPH - Secretarial work, office management
1
more ...