Vocabularies 
ALFRED
AO
AO Foundation
BRENDA
CAS number
CAS Number
ChEBI
ChEMBL
ChemSpider
dbSNP
DiseasesDB
Dorlands /Elsevier
DrugBank
EC number
ECHA InfoCard
eMedicine
Ensembl
Entrez
ExPASy
External IDs
FMA
GARD
Gene Ontology
GeneReviews
HapMap
HgenetInfoDB
HUGO
ICD-10
ICD-10-CM
ICD-9
ICD-9-CM
ICD-O
IntEnz
InterPro
IUPHAR/BPS
KEGG
MedlinePlus
MeSH
MetaCyc
NCI
NeuroLex ID
NORD
OMIM
Orphanet
Orthobullets
OrthoInfo
Patient UK
PDB structures
Pfam
Pfam clan
PRIAM
PROSITE
PubChem CID
Radiopaedia
Radiopedia
RefSeq
Rfam
SCOP
SNPedia
SUPERFAMILY
TA
TE
TH
UNII
UniProt
Wheeless Online