To help compare sizes of different surface areas, we list here areas of the order of 1020 square metres, i.e. those between 100 trillion km2 and 1 quadrillion km2. See alsoareas of other orders of magnitude.
... mean the following:
dB is the abbreviation for Decibel; see Bel
DB is a French automobile maker; see DB (car)
DB is the abbreviation for Deutsche Bahn, the major ...