Soviet Opytnoye Konstruktorskoye Buros (OKBs)

OKB is a transliteration of the Russian initials of "Опытное конструкторское бюро" – Opytnoye Konstruktorskoye Buro, meaning Experimental Design Bureau. During the Soviet era, OKBs were closed institutions working on design and prototyping of advanced technology, usually for military applications.

OKB-329 – Mil http://en.wikipedia.org/wiki/Mil_Moscow_Helicopter_Plant OKB-156 – Tupolev http://en.wikipedia.org/wiki/Tupolev

http://en.wikipedia.org/wiki/OKB