appendix vs preface

appendix

• A text added to the end of a book or an article, containing additional information. 

• Any process, prolongation, or projection. 

• The vermiform appendix. 

preface

• An introduction, or series of preliminary remarks. 

• A title or epithet. 

• The beginning or introductory portion that comes before the main text of a document or book. 

• The prelude or introduction to the canon of the Mass. 

• To give a preface to. 

• To introduce or make a comment before (the main point).