 Microsoft CEO Satya Nadella has been in the top job for five months, and there's one point he keeps driving more than any other. Mobile first and the cloud first. Mobile first, cloud first. Mobile first, cloud first. He's now firmly stamping his mark on the software giant. In a long letter to Microsoft's more than 100,000 employees, Nadella outlines his vision to reshape the core of Microsoft. First and foremost, he's dropping the devices and services focus that former Microsoft CEO Steve Ballmer brought in, and instead refocusing on cloud and mobile. It's Microsoft going back to what it does best, its software roots. That culling of the devices and services focus doesn't mean Xbox or Surface are going anywhere just yet. In fact, Nadella remains committed to Microsoft's game console and describes its latest Surface Pro 3 tablet as an example of how Microsoft will build first-party hardware in the future. If anything, Nadella's letter is largely an omission of how Microsoft is changing, and how he, as the new CEO, wants to change the company's culture to get there. Some of those traditions already appear to be out the door when Nadella opting to bring Office for iPad to fruition and traveling to the heart of Silicon Valley to impress in relaxed and informal surroundings. The timing comes shortly before Microsoft reports its latest financial results, and amid rumors the company is planning layoffs shortly. Nadella doesn't touch on those aspects, of course, instead focusing on the future. Quote, we will collectively transform this company and seize the great opportunity ahead. Learn something mobile first, cloud first.