OSE

OSE may be:

An acronym standing for Operating System Embedded, a real-time operating system created by the Swedish firm ENEA.
An abbreviation of OPENSTEP Enterprise, NeXT's offering of the OpenStep platform for the Microsoft Windows operating system.
An abbreviation of Organismós Sidirodrómon Elládas (Hellenic Railways Organisation), the state railway of Greece.
An abbreviation of Osaka Securities Exchange
An abbreviation of Oslo Stock Exchange