: The user interface became fully customizable across all applications. Backstage View
Before 2010, Excel was a 32-bit application. This meant it could address a maximum of (4 GB theoretically, but less in practice). For most users, that was fine. But by 2010, datasets were exploding: MICROSOFT OFFICE 2010 EXCEL X64 -thethingy-
was a landmark release for the suite, marking the first time Microsoft provided a 64-bit version ( : The user interface became fully customizable across