Incidentally.

(music) Oboe(s).

Initialism of Office of Bilingual Education. / (US politics, historical) Initialism of Office of Business Economics, now BEA. / Initialism of Oregon Board of Education.

Initialism of Officer of the Order of the British Empire. / Initialism of operating-basis earthquake. / Initialism of out-of-body experience. / Initialism of outcome-based education.

Initialism of overcome / overtaken by events (i.e., now obsolete)

Alternative form of obs (obsolete)

Abbreviation of obsolete (as a gloss for words in dictionaries) / Abbreviation of observed

(medicine) Observation(s) (blood pressure, temperature, etc).

(slang) police observation / An observation hut.

plural of ob