In Computing, Universal Network Objects (UNO) is the software component used in OpenOffice.org. It is interface-based and designed to offer interoperability between different programming languages, object models and machine architectures, on a single machine, within a LAN or over the Internet.

UNO components can be implemented in or accessed from any programming language for which a language binding exists. Complete UNO language bindings exist for C, C++ (compiler dependent), Java programming language and Python. Bindings allowing access, but not writing components, exist for StarOffice Basic, Object linking and embedding automation and the Microsoft .NET Common Language Infrastructure (not finalised).

UNO is open source, distributed under the LGPL.

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