Apple is selling Microsoft Office 365 as an accessory for the iPad Pro | The Verge

Also see Smaller iPad Pro can use Microsoft Office for free, while larger iPad can't (Macworld)

"Apple wants the iPad Pro to replace Windows, and to convince customers it's bringing in a familiar face or two: Microsoft's Office suite. As part of the ordering process for the new iPad Pro, buyers are given the option of adding a subscription for Office 365 — the only non-Apple accessory to appear in the order form. Office 365 bundles in the mobile apps and full Mac versions of a number of old standbys, including Word, Excel, PowerPoint, and OneNote. (You can also choose between the Home, Personal, and University tiers, each of which offers different features.)"

Apple is selling Microsoft Office 365 as an accessory for the iPad Pro | The Verge