O
O.ERRE / OERRE
O.M.B. Vibrator Motors
Octagon Systems
OEG Brakes / Officina Elettromeccanica Gottifredi
OEMER
Ogura Clutch
Oiltech
OJOP
Olaer (brand of Parker)
Oleodinamica Marchesini
ON Semiconductor
Onka
OPKON Elektronik
optek-Danulat
optris
orange research
Orbinox
Osborn / Osborn International
OSIP Pump
OSLV
Ott Antriebe
OXFORD INSTRUMENT
