Bologna:

oasi lavoro
OCEM Power Electronics
Octocom
Octopus Energy Group
Oliver James Associates Ltd.
omnia infissi
omnia retail
Omnissa (Italy) S.r.l.
oncode
OneOcean Group
OneStream Software LLC
oneway promotion
onit
only job
Onyx Technology S.r.L.
Opdenergy
OPEN MIND Technologies AG
Open Smart Services
Open-Xchange Inc.
openjobmetis
Openjobmetis SpA
OPLIUM
optima
Optima S.r.l.
OralPro
orange italia
Orbyta Group
Orchard Robotics
orienta
Orienta SPA
OSM Medical
otis elevator company
ottosunove
Out in Science, Technology, Engineering, and Mathematics
OutSystems, Inc.
OVERTECH Consulting
ovs
OVS S.p.A.
Oxford Instruments
Oxigent Technologies
Oysho