Non Directional Beacon
NORDBERG
Nuclear Depth Bomb
Navigation Data Base
Non-Directional Beacon
None of your Damned Business
National Data Bank for Rheumatic Disea…
National Data Base
National Delegates Board
National Dental Boards
National Development Budget
National Discount Brokers
NATIONAL DISCOUNT BROKERS GROUP, INC.
Nautical Directional Beacon
Network Data Base
Network Database
Network Database Benchmark
Network-Determined Busy
Networked DataBase Service
NIH Data Book
Non Direction Beason
Non-Direction Beacon
Non-Directional Radio Homing Beacon
Nondirectional Radiobeacon
Nucleic Acid Database
nucleus of the diagonal band