Palermo:

Octocom
Octopus Energy Group
Oliver James Associates Ltd.
oliveri domenico
omnia retail
Omnissa (Italy) S.r.l.
Oncode
One Team Group
OneOcean Group
OneStream Software LLC
Onyx Technology S.r.L.
Opdenergy
Open Smart Services
Open-Xchange Inc.
openjobmetis
openjobmetis filiale di palermo
Openjobmetis SpA
OPLIUM
OralPro
Orbyta Group
Orchard Robotics
Orienta SPA
OSM Medical Sud Italia
osmosi
osteria dei vespri
otis elevator company
Out in Science, Technology, Engineering, and Mathematics
OutSystems, Inc.
OVERTECH Consulting
ovs
OVS S.p.A.
Oxford Instruments
Oxigent Technologies