C    ↑
C	C#
C++	C-KAT
CA-SuperDB 3.5PrimaBase 3.13	CAB
CACAO (2)	Cache Explorer
CAI	CAIN
CAIRS (2)	CALAIS
Calhoun report (3)	CALS (2)
Cambridge analytica	Canadian National Bibliography
Canadian Research and Development Classification	CANAL
CANAL/LS	CANARIE
CANMARC (3)	CANSEARCH
CapAccess	CAPCAS (3)
Capito	CAPS
CarbonCopy	Cardbox
Cardbox 4.1	Cardbox for Windows
CardMaster Plus	CardView
Carelit® Thesaurus	CARL (4)
CARLweb	CARMEN (21)
CAROL	CAS (2)
CASIAS (2)	CAT ME Plus (4)
Cat. gén. (2)	CATHIE
Catholic Subject Headings	Catmandu
CatME	CatMe Plus
CATNYPL	CATRIONA (6)
CatSkill	CatTutor
CBIR (10)	CBR -> Sachgruppe: Case Based Reasoning
CBT -> Sachgruppe: Computer Based Training	CC (65)
CC-1	CC-4
CC-6 (4)	CC-7 (23)
CC7 (2)	CCC
CCF (18)	CCITT
CCL	CCLitBox
CCMapper	CCML (2)
CCS (2)	CCT
CD Answer	CD-Answer
CD-Author	CD-Biblio
CD-PAC (14)	CD-R (2)
CD-RDX	CD-ROM Directory
CD-ROMs in Print	CD:Search
CDA	CDIntro
CDMARC	CDMARC Bibliographic (2)
CDMARC serials	CDMARC Subjects (7)
CDMES	CDRS (2)
CDS/ISIS (100)	CELEX (3)
Cello	CEMARC
CENL (4)	CERETHES
CERIF (4)	CERL (2)
CERL Thesaurus (3)	CERN
CGI (12)	Chain indexing (16)
Chameleon	CHAOS
ChatGPT (50)	ChatRule
ChemGuide	Chemical Abstracts (13)
Chemical Abstracts Registry System	Chemisches Zentralblatt
CHESHIRE	Cheshire II
CHEST	CHILIAS (6)
Chimera	China Scientific and Technical Papers and Citations Database
Chinese Agricultural Thesaurus	Chinese Classification Scheme
Chinese Classified Thesaurus	Chinese Library Classification
Chinese Subject Headings (2)	Chrome
Chronik des 20. Jahrhunderts (2)	Chronik des deutschen Films
Chronik des Films	CIA World Factbook (2)
Ciao	CIB Project
cibera (3)	CICADE (4)
CICERO-Thesaurus	CIDOC (2)
CIDOC CRM (21)	CIDOC-CRM (3)
CINAHL	CINDEX (4)
CINDI	Cinemania (5)
CIP (13)	CIPAC (8)
Circle of knowledge	CISLEX
CitaDel	Citation 7
Citation 7.1	Citavi (4)
CITE (2)	CiteBase
CitEc	CITED
CiteSeer (7)	CiteSpace
CiteULike (5)	CKHW
CKML	Clarion
Claris Homepage	CLARIT (4)
Clarivate	Classaurus (6)
Classcon	Classification Web
ClassWeb	CLASTHES
CLC	CleanTXT
Clearview	CLEF (8)
Clio-online (2)	Clipper
CLIR	CLIS
Clonto	Clusty (3)
Clusty.com	cMap Tools
CMARC (2)	CMB Storager
CMC Information Sources	CMIP
CnetSearch	CNN
COBISS	COBISS.SI
CoBRA (5)	COBWEB
Cocoda (5)	Cocoon
CoDAS	CODEX
COFIND	COGET
Cold Fusion (2)	Coli-con
coli-conc (5)	Colibri (6)
COLLATE	Colon Classification (2)
Columbia Library System	Colwiz
COM-Kataloge	COMET
Comix	Commercial Sites Index
Common Ground	Compact Disclosure
COMPASS (9)	COMPENDEX (5)
Complete Reference Collection	Compton encyclopedia (41)
CompuPic	Compuserve (45)
Computer Abstracts	Computer Science Ontology
ComputerSelect (2)	Computing Classification Scheme
Computing Classification System (2)	Comte's classification of the sciences
CONCEPT 16	ConceptBase
ConceptDraw	Concepto (4)
CONDOR (5)	Condorcet
Cone Tree Visual Recall	ConeTree
ConImp	CONIR
CONNAISSANCE	Connexion
Connotea (3)	CONNY
ConQuest (5)	Consearch (2)
ConSearch 7.5	CONSER (18)
Conspectus (3)	Constellation
Contenido	Content Surveyor
CONTENTS-Alert	ContentsFirst
CONTENTUS (3)	CONTERM
ConText	Context-based Term Frequency Assessment
Convera RetrievalWare	Convera RetrievalWare 8.0
ConWeaver (2)	CoOL
CoolSites	COPAC (5)
COPAR	CoPAS
COPEARMS	CopeOpi
Copernic (7)	Copernic 2000
Copernic Basic	Copernic Desktop 1.61
Copernic Desktop Search (3)	Copernic Summarizer (3)
COPICAT	COPSY (2)
Copycatch (www.copycatchgold.com)	CORC (16)
CORDIS	CORE
Corel Web Designer	CORELI
Corona (2)	COSATI Subject Categories
CoSession	COSIMIR
COVID-19 (8)	CQL
CR classification	Cranfield (17)
Crawl-It	Crawler (5)
Creative Wonders 3D Atlas '98 -> 3D Atlas '98	Creditreform
CRG (37)	CRHTC
CrissCross (42)	Crossfire (3)
CrossRef (4)	Crosstalk 2.01
CSCD	CSKOL
CSO	CSS (2)
CTI Plus	CTX (3)
CUI (2)	CUI 3W
CUI W3 (4)	CUI W3 Catalog (2)
CUI-W3	Cuil (2)
Culturegraph	CultuurLink
CUMULUS (2)	Cumulus 2.0
CURL (4)	Current Contents (4)
CUSI	Cutter expansive classification (2)
Cutter-Sanborn-Tafel (2)	Cutter-Tafel (6)
Cutter-Zahlen (7)	CVEPS
CWIS (8)	CyberDewey
CyberHound (3)	CyberSearch
CyberStacks (2)	Cyc (9)
Cyril
D    ↑
D&A-Klassifikation	D-Atlas
D-Info (2)	D-Medien
DA-2	DABI
DACS	Dada
DAFFODIL (5)	DAINet
DAISY	DAML (4)
DAML+OIL	Damocles (viper.csse.monash.edu.au/~damocles)
DanBib	Dandelon (12)
dandelon.com (2)	DANIS
DANLIB-base	DanMARC2
DAPHNE (2)	DARIAH-DE
DarkBERT	Data Becker Lexikon
Data Becker Lexikon 2005 (2)	Data Citation Index
Data Discman (4)	DataCite (2)
DataEase Express 1.0	Datamat 98
DataStar (3)	Dataware (2)
Datenschutzgrundverordnung	DATEX-J (25)
DATEX-M	DATEX-P
DavexPlus (2)	DAVID
David 1.0	DayFlo Tracker
DayfloTracker	Daypop
DB (4)	DBA
DBase (4)	dBASE III
dBase III plus	dBase IV
DBClear	DBE
DBFace	DBI
DBI-Clearinghouse (2)	DBI-Link (3)
DBI-VK (9)	DBI-VK s. auch VK (als Publikation des ZLB Berlin)
DBLP Computer Science Bibliography	DBN
DBpedia (12)	DBpedia Archivo (2)
DBpedia Mobile	DBV
DBV-OSI II (4)	DBV/OSI II (5)
DC Singapore Framework	DCAM
DCI index	DCMI-type-vocabulary
DCRB Core standard (2)	DCRM
DDB (2)	DDB-online
DDC (428)	DDC Abridged-12 (3)
DDC Abridged-13 (3)	DDC Deutsch (73)
DDC-1	DDC-15 (2)
DDC-15 Abridged	DDC-17 (2)
DDC-18 (8)	DDC-19 (5)
DDC-2	DDC-20 (19)
DDC-21 (45)	DDC-21 s. auch Dewey for Windows
DDC-22 (14)	DDC-23
DDC-Sachgruppen (4)	DDC17
DDC18	DDC19
DDC20 (5)	DEAL (2)
Dearing-Report	DECIDoc
DeCOVER	DeepL
DeepMind	Deja News
Deja-News	DejaNews (2)
Del.icio.us (4)	Delicious (6)
DeLiVerMATH (2)	Delta 97
DeMorgan-Regeln	DEPAROM
DERA	DES (8)
DESIRE (16)	DEUTERM (2)
Deutsche Digitale Bibliothek (13)	Deutsche Internetbibliothek (11)
Deutsche Nationalbibliographie	Deutsches Rundfunk Archiv
Devisagen	Dewey for Windows (11)
DeweyBrowser	DFG (3)
DFN	DH/DSS-DATA Thesaurus
DHTML (4)	DIALOG (15)
DIALOG OnDisc (2)	DIALOG OneSearch
DIALOG Web (2)	DialogSelect
DialogWeb	DIANA
Dictionary of National Biography	DIEPER
DIF	DiFAB
DigCIM	DigDok (2)
DigiAuskunft	DigiBib (20)
Digibib NRW (5)	Digibib NW (2)
Digicult S-H	DigiLink (2)
Digital Library Federation	Digital Public Library of America
Digital Scriptorium	Digitale Bibliothek (2)
Digitale Peters	Digitaler Assistent
DigiTool 3.0	DigiZeit
DIGLIB	DIMDI (7)
Dimensions (3)	DIN (3)
DIN 1463 (3)	DIN 1505
DIN 2330	DIN 31 623 (2)
DIN 31 624	DIN 31 631
DIN 32 705 (2)	DIN 4000
DIN 5007	DINI (2)
DINO (14)	Dino-Online (2)
DINT	DIPF (4)
Direct Connect	DirectHit (2)
Discover	Discovery Agent
DISCUS (2)	Disputo
Dissertation Abstracts (2)	DissOnline (6)
DistanceRank	DISTR
DITR	DiVA
DiViBib	DK (116)
DK-5	DMARC
DMI	DMOZ (2)
dms4cite	DNB (44)
DNB Musik	DNB-CD
DNB-CD retro	DNB-CD retro 1945/65
DNB-CD retro 1945/71	DNB-CD retro 1972/85 (2)
DNB-Musik	DNB-ND (3)
DNI	DOBI (5)
DOBIS (2)	DOBIS/LIBIS (6)
DocCat (6)	DocCube
DOCMA	DOCMATCH
DocThèses	Documenta
Documentum	Documind
Documind Pro 3.0	Documind Pro 5.0 (2)
DocuSource	Docuware (2)
Dogpile (5)	DOI (24)
Doku-Finder	DokuFinder
DOMA-Thesaurus (2)	DOMESTIC (12)
Dooyoo	DOPE (2)
DoRIS	Dornröschen-Problem
DORS (2)	DOS
Dow Jones Interactive (2)	dpa
DR-LINK (3)	Dr.Claus Steiner
Dr.Doc (3)	DRA
Dragon Naturally Speaking	Dreamweaver
Drei-Länder-Katalog	Dreiländerkatalog (3)
DRIVER	Drumbeat
DSB (10)	DSC
DSIS (9)	DSM
DSpace (2)	DSSSL (3)
DTD (2)	dtSearch (3)
dtSearch 6.07	DtSearch 6.33 (2)
dtv-Lexikon (2)	Dublic Core
Dublin core (121)	Dublin Core Application Profiles
Dublin Core Microformats	DUC
DuckDuckgo (2)	Duden (4)
Duden Lexikon	Dun & Bradstreet
Durchblick Mensch	DutchESS (2)
DVD (3)	DVI (4)
DXS	Dynacomm 3.1
Dynamic diagrams	DynaText (2)
Dynix (3)	Dynix Horizon (5)
Dynix Marquis	Dynix WebPac
Dynix-Horizon (4)