Ventana Systems, Inc. 
60 Jacob Gates Road
Harvard MA 01451 +1 (978) 456-3069

Ventana Systems UK, Ltd.
Our sister organization in the United Kingdom, Ventana UK collaborates closely with us on modeling projects and interface design. They produce the Sable interface development environment for Vensim models, and they are the UK distributors for Vensim.

Vensim® Software
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