Yoruba king.

Oba has two meanings: it can be a King or a Goddess.

Office of Biotechnology Activities” is the office within the NIH that is responsible for: (i) reviewing and coordinating all activities relating to the NIH Guidelines, and (ii) performing other duties as defined in Section IV-C-3, Office of Biotechnology Activities (OBA)

Off-Board Artillery

Optical Bench Assembly

A substance that when added to a substrate increases the apparent reflectance in the visible region by converting ultra-violet radiation into visible light and so increases the whiteness or brightness.

Oxygen Breathing Apparatus

Output-Based Aid

On Base Average. See On Base Percentage

Open Book Accounting