Nearly two years after the launch of Microsoft’s Surface tablets, we’re still waiting for a fully touch-optimized version of arguably the company’s most important product: Office. For iPad users, though, the wait is about to end. While it might seem odd for Microsoft to launch an iPad version of Office before taking care of its own Windows tablets, the move is indicative of new areas of focus in the Satya Nadella era. Microsoft has been building iOS and Android apps for some time, and the company is increasingly pushing its software and services across multiple platforms. Microsoft’s efforts on the Apple side appear to be reaping some early rewards. OneNote for Mac, a highly anticipated app that launched earlier this week, now sits at the top of Apple’s Mac App Store, joining two other free Microsoft-built Mac apps — OneDrive and Remote Desktop — in the Store’s top 10.