How many different command tabs are there on the ribbon?

The ribbon in Microsoft Office applications typically contains several command tabs, with the most common ones being File, Home, Insert, Design, Layout, References, Mailings, Review, and View. The exact number of tabs can vary depending on the specific application and version, but generally, there are around 9 to 12 primary command tabs. Additionally, some applications may have context-specific tabs that appear when certain elements are selected.