Perhaps the most technically significant change in Excel 12.0 was the abandonment of the proprietary binary file format (.xls) in favor of the Office Open XML format (.xlsx).
The most visible change was replacing traditional menus and toolbars with a tabbed . Tabs like Home, Insert, Page Layout, Formulas, Data, and Review organized commands contextually. This was controversial at launch but became the industry standard.
Perhaps the most technically significant change in Excel 12.0 was the abandonment of the proprietary binary file format (.xls) in favor of the Office Open XML format (.xlsx).
The most visible change was replacing traditional menus and toolbars with a tabbed . Tabs like Home, Insert, Page Layout, Formulas, Data, and Review organized commands contextually. This was controversial at launch but became the industry standard.