NEDLANDS-BASED mining software developer, ISS Group Ltd, has signed a purchase agreement and subsequent four-year maintenance and support contract with BHP Billiton Nickel West for its BabelFish suite of products. The ISS BabelFish software will be used to access and analyse vital plant operations and laboratory data for the Nickel West operations including Mt Keith, Leinster, Kambalda, Kalgoorlie and Kwinana.