For an overview of error comment types, please have a look at the Spell checker manual. The spell checker module of DanGram used here, was developed by GrammarSoft Aps as part of the Windows-integrated OrdRet software package targeting spelling weaknesses in general, and Danish dyslectics in particular. The project as such is documented at www.ordret.com, where user information, technical data, performance evaluation and a project history can be found.