Aton is a set of classes for accessing CDS/ISIS databases. Its name comes from the egyptian god Aton (or Aten), which was the first one god, and the first dead god as well. In spanish, my language, is spelled "Atón" which means that the last syllabe is stressed. Since computer science is still fighting with such human matters (and Squeak is not an exception: look at what Monticello does with accents), we have to use the name without accent for the file names of the packages. It provides full reading access to master and inverted files and aditionally, it can read ISO2709 files. Write access is provided for master and ISO2709 files but not for inverted files, so updating or recreating isis's dictionary is not possible. Format and search language is not implemented yet. Requires AsciDosConverter, BlockFile, Iterator and IsisFields