I feel like this question is pointless gotcha journalism. You could apply it to any major tech company and you would get muddled answers.<p>- What is Google? They are a search company. So why do they have an email service and a cell phone operating system? Why are they inventing self-driving cars and buying major hardware companies? Why are they pushing a social network so hard?<p>- What is Apple? They are an electronic device company. But they have by far the most successful retail stores in the world, and they are one of the largest online retailers in the world.<p>- Speaking of retail, what is Amazon? The world's largest online retailer, right? So why are they running a huge cloud computing project? Why are they making tablets?<p>- What is Microsoft? The world's largest software company. So why does their gaming division primarily sell hardware? Why did they just come out with their own tablets?