Ocean Of America
    Oki Semiconductor
    Okidata
    Omni Computer Productrs
    OmniMedia
    Omnitron Systems
    OneWorldSystems
    OnStream
    Onvia
    Opalis
    Opcode Interactive Systems
    Open Environment
    OpenConnect Systems
    OPTI UPS
    Optoma Technology
    ORA Electronics
    Osicom Technologies
    Ositech Communications
    Ositis
    Overland Data