CG6400 Preface

Dear all,

I have reviewed the chapter 0, Preface of the Calc guide, you can find it in the Draft folder.

Best regards

Leo

Many thanks Leo.

When returning comments, I think we normally put the updated file in the
Feedback folder. On this occasion don't worry, I've moved the Preface and
updated the spreadsheet accordingly. Worth bearing in mind in future though.

Regards,

Steve