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Over the last decade many but totally different Total Cost of Ownership reports were generated for a same system. It was even more puzzling since most of the times these reports were sponsored by the vendors themselves. There is more or less a war between Windows and Linux about which one has the best TCO. It is highly likely that the generated TCO is based on vendors' feelings for their operating...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.