Classification
ACE - Germanic languages, Indo-Germanic languages
75
TAA - Engineering sciences - reference books
65
ACA - Languages, dictionaries - general
17
PAA - Physics - reference books
17
ACH - Romance languages
16
TBA - Electronic engineering - general
16
AFG - Large scale research institutions (Helmholtz Centres)
12
AQTC - Publication lists of institutions - Germany
12
YAB - Law, economy, social affairs - dictionaries
12
CAA - Chemistry - reference books
11
TAB - Engineering sciences - dictionaries
11
TCA - Communication science - general
11
ACM - East european languages
10
CUA - Spectroscopy
9
EAA - Energy - reference books
9
HAA - Medicine - reference books
9
TEA - Electrical engineering - general
9
ACZ - Lists of abbreviations
7
ABD - National biographic catalogues - Germany
6
EXA - Energy policy
6
LAA - Biology - reference books
6
ACQ - Oriental languages
5
CLG - Catalysis - surveys, general aspects
5
FAAE - Nonmetallic materials - reference books
5
FNJ - Plastics - general aspects
5
YPB - Economy - general aspects
5
AMA - Education - general
4
LTD - Biotechnology - comprehensive works
4
YBA - Law - encyclopaedic glossaries
4
AHL - Presentations, lectures, discussions
3
AZZ - Firm index - general
3
CUUP - ESR spectroscopy, hyperfine interaction
3
DAA - Information technology - reference books
3
DPA - Electronic data processing - applications
3
FAAC - Engineering materials - reference books
3
FPM - Materials testing - general aspects
3
HPD - Pharmacology - comprehensive works
3
LKA - Biochemistry - reference books
3
LMN - Molecular biophysics, biophysical chemistry
3
UAA - Environment - reference books
3
YZA - Politics, political science
3
AHH - Universities - research
2
AHK - Scientific work
2
CBB - Inorganic chemistry - comprehensive works
2
CBR - Inorganic synthesis and reactions of metals and their compounds
2
EPK - Nuclear energy
2
GAA - Geosciences - reference books
2
GAB - Geosciences - dictionaries
2
HDA - Neurophysiology, neurology - reference books
2
HVA - Internal medicine - comprehensive works
2
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