CDBD tables in CRM

hello all,

What is the difference between

CDBD_orderadm_h

CRMD_orderadm_h

BAD__orderadm_h tables?what is the significance of the Prefixes CDBD* , BAD* ?

I have observed lot of tables which start with SMO* for eg SMOVBAK

SMOVBAP where are these tables used and for what?

Thanks!!

Regards,

Rahul.