This book focuses on CALC, the free OpenOffice spreadsheet application. You will study the basics, such as the different menus, the cells management, the manipulation of the rows and columns, the formatting of information, the printing layout, but also the realization of simple and complex calculations using functions.You will discover other possibilities : the manipulation of dates, the charts, the lists of data and the pivot tables that enable you to create statistics easily. The macros will be presented.This book is intended for people who want to progress and are looking for the different features of this spreadsheet.Enjoy your reading !