XLSX Excel Spreadsheets are different than the XLS version in that they use the Microsoft Office Open XML format. The Open XML format makes it easy for other programs, such as OpenOffice.org, to read XLSX files (and other Open XML file types). The Open XML format was introduced with Microsoft Office 2007.
It was first published anonymously in Paris in 1697 in Histoires ou contes du temps passe (PassÃ©: English stories Or tales Of Past), times a collection of eight fairy tales By. perrault
Chretien de Troyes, also French, wrote five Arthurian stories between the years 1160 and 1180. He developed the theme of chivalry and dwelt on the subtleties of courtly romance. Another French man, Robert de Boron from Burgundy, developed the idea of the Quest for the Holy Grail.