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Being elderly retired I did not want to spend more money on MS Office after I got 2003 at a discount through my Engineering Institution. Recently I found a spreadsheet on line which I needed but Microsoft has moved on to make its old Office incompatible. The .xlsx file could not be read in MS Office 2003 but Libre Office read it without any problems. So why waste money on Microsoft every 18 months or so when you can keep up to date for free?