A new report from ButlerBloor Ltd of Hull, UK, evaluates and compares 20 database products: for high volume transaction processing applications the report identifies Informix Online, Ingres, StarBase and Unify 2000 as the most appropriate environments, but adds ominously that implementing large, complex database applications under Unix is likely to be a high risk activity for one or two years to come – we would urge anyone looking to use Unix as an environment to validate the technology before it is used; the report is UKP500 from the firm.