The present invention relates to the use of antioxidants in Fischer Tropsch derived products. In particular, an annotation component is configured to receive annotations of data for a data source, wherein the respective annotations comprise different associations of a global terms with the data of the data source, a data store configured to store the annotations, and an interface component configured to render the data based on the annotations in response to a request for the data. The Dial Tracker Scale may be a mechanical device requiring no battery power.