Classification
FAF - Materials research - comprehensive works
35
PAD - Physics - comprehensive works
33
TKH - Air flight, space flight
33
ALH - Works of scientists and Nobel prize winners
32
THQ - Fluid mechanics and dynamics
24
THA - Mechanical engineering - general
23
TEA - Electrical engineering - general
22
THC - Engineering mechanics and dynamics
21
LET - Phytopathology
18
THHD - Machine parts
16
TCC - IT - Information and telecommunication
15
LWV - Agriculture - plant protection
14
LWVC - Plant protection
14
FJH - Semiconductor physics
13
PAE - Physics - general interest
12
TBA - Electronic engineering - general
12
TCA - Communication science - general
12
THD - Design and construction in mechanical engineering
12
THH - Machines
12
FAO - Materials science - introductions
11
AFK - Research institutions - Germany
10
FAQ - Materials research - institutions, research and development
10
FKML - High magnetic field effects
10
PKA - Elementary particles, nuclei - general
10
DMC - Computer programs
9
EHA - Renewable energy sources
9
LTD - Biotechnology - comprehensive works
9
LTR - Bioreactor technology, fermentation
9
MWH - Statistics
9
TGNB - Control engineering - basics
9
ALE - Biographies of scientists and Nobel prize winners - individual
8
CELC - Organic synthesis
8
FPM - Materials testing - general aspects
8
LHL - Microbiology - general aspects
8
LMN - Molecular biophysics, biophysical chemistry
8
LTH - Biotechnology - methods
8
LWE - Agriculture - general aspects
8
TGN - Control engineering
8
THF - Finite element methods - engineering aspects
8
USNG - Waste water treatment - biological aspects
8
AFG - Large scale research institutions (Helmholtz Centres)
7
AHP - Philosophy
7
AHZ - History of science and technology
7
CT - Chemical methods of materials analysis
7
DGA - Computer types, plants and organization
7
DOE - Programming language - BASIC, Turbo BASIC, Visual BASIC
7
FNV - Composite materials, fiber materials
7
LTN - Biotechnology - biodegradation
7
MNLS - Computational methods - algorithms, software
7
MWG - Simulation, Monte Carlo method, random numbers
7
more ...