Name Explanation Examples
OBP Opticheskij Bombardirivichnyj Pritsel , Optical Bomb Sight
OELID Otdel Eksperimentalno Letnyh Ispytanij i Dovodki , Section for Experiemntal Flight Tests and Final Tuning
OFAB High explosive / incendiary aiva bomb, Oskolochno-Fugasnaja Aviabomba
OGPU Osoboe Gosudarstvennoe Politicheskoe Upravlenie , Special Governmental Political Management, Political police, to became KGB
OIIMF Special Design Bureau, Osoboe Konstructorskoe Buro
OKA Early designation for aircraft by Oleg Konstantinovich Antonov; OKA-33
OKB Odessa Engineering Institute of the Open-sea Fleet, Odesskij Institute Inzhenerov Morskogo Flota
OKO Special Design Section , Osobyj Konstructorskij Otdel OKO-6
OMOS Department for experimental naval aircraft construction , Otdel Morskogo Opytnogo Samoliotostroenija see OMOS page
OOS Department for experimental aircraft construction , Otdel Opytnogo Samoliotostroenija
OP Optical Gunsight, Opticheskij Pritsel
OPB Single-seat dive bomber , Odnomestnyj Pikorujuschij Bombardirovschik OPB-5
OPB Optical Gunsight version, Opticheskij Pritsel B?
OPO Experimental department, OPpytnij Otdel
ORA Special Reconnaissance Air Detachment, Osobyj Razvedovatelnyj Aviaotryad
OSGA Department for glisser and airsled construction, Otdel Stroitelstva Glisserov i Aerosanej
OSGA Department for glisser and airsled construction, Otdel Stroitelstva Glisserov i Aerosanej
Osoaviakhim The All-Union Voluntary Society for Support of the Air Force, ObscheSouznoe Obschestvo Aviatsii and Chimii
OSK Department for Special Constructions,
Otdel Spetsialnykh Konstruktsij
OSKBES The Sectoral Special Design Bureau for Experimental Aircraft Construction,
Otraslevoe Spetsialnoe Konstruktorskoe Buro Experimentalnogo Samoletodtroenija
see OSKBES MAI
OTB Special Technical Bureau, Osoboe Tekhnicheskoe Buro. Very special because within NKVD system. See OTB page