# Versions of the HUGIN System

Three versions of the HUGIN system are available: HUGIN Light™, HUGIN Explorer™, and HUGIN Professional™. HUGIN Professional™ consists of both HUGIN Runtime and the HUGIN API, it is intended for developers using the HUGIN inference engine as part of custom-built applications. It provides the full HUGIN inference engine and development facilities. HUGIN Explorer™ consists of HUGIN Runtime containing the three components: the graphical editor, the HUGIN compiler, and the runtime-system. HUGIN Light™ is a free version of HUGIN Explorer™ for people who do not trust sales literature. HUGIN Light™ contains all the basic functionality of HUGIN Explorer™, except load and save of models with more than 200 states. The HUGIN Light™ is intended for giving an idea of the possibilities and facilities in HUGIN Explorer™. The HUGIN Explorer™ version and the HUGIN Professional™ version both allow construction of Bayesian Belief Networks of any size, limited only by the amount of virtual memory available. Neither version has limitations on the number of nodes or the number of states of each node.

## Special HUGIN API versions.

The HUGIN inference engine is highly portable. This means that versions of the HUGIN API can be produced for many types of machines and operating systems. If you have special requirements, or special machines you would like to see supported, please contact HUGIN Expert A/S. If possible, we will be happy to produce special HUGIN API versions on request.

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