Databases and their types

How many types of databases one can imagine?

Chemical Databases

Financial Databases

Biological Databases

Kinematic Databases

Astronomical Databases

Neurological Databases

Defense databases

Astrological Databases

Astro physical databases

medical databases

demographic databases

geographic databases

Information Technology databases

Art databases

Is this an exhaustive list or can we imagine even more?

I'll wait for few more days to get more thoughts

Genes and Databases

I never heard about these and I'll post soon on all the below:

DDBJ, EMBL, GenBank,Ensembl,Uniprot,Swiss-prot

DDBJ is Japanese DNA Data Bank.

EMBL is Europe's primary nucleotide sequence resource

GenBank  is the NIH genetic sequence database, an annotated collection of all publicly available DNA sequences 

Ensembl: The Ensembl project produces genome databases for vertebrates and other eukaryotic species 

Uniprot: Universal Protein Resource

Swiss-Prot is the manually annotated and reviewed section of the UniProt Knowledgebase (UniProtKB)