Napoli:

Octopus Energy Group
oegreen
Oetker Hotel Management Company GmbH
Oliver James Associates Ltd.
omega impianti
Omnissa (Italy) S.r.l.
Oncode
OneOcean Group
OneStream Software LLC
Onyx Technology S.r.L.
Opdenergy
Open Smart Services
Open-Xchange Inc.
openjobmetis
Openjobmetis SpA
operoso gruop
OPLIUM
opslab
optima italia
OralPro
Orbyta Group
Orchard Robotics
orienta
orienta agenzia per il lavoro
orienta filiale di firenze divisione altro lavoro
orienta filiale di milano giotto
Orienta SPA
osmosi
Osmosi S.p.A.
otisopse
Out in Science, Technology, Engineering, and Mathematics
OutSystems, Inc.
OVERTECH Consulting
ovs
OVS S.p.A.
Oxford Instruments