Oasys Limited is a wholly owned subsidiary of the renowned Consulting Engineers, Arup Group Ltd. We were established in 1977 to provide a vehicle for marketing and selling engineering software developed to exacting standards for use by Arups engineers. The current programs address frame and 2-D analysis, reinforced concrete analysis and design, a comprehensive range of geotechnical problems and new to our portfolio are CADtools for plotting, batching and reinforced concrete. Also added is the most widely used document management software Columbus. Used by over 15,000 companies in 164 countries.