It is a staple bullet-point in many job postings: "Must be proficient in Microsoft Office." What exactly this means is up for debate, since Office now encompasses many different applications and has evolved significantly in just the last decade. Office used to be sold as licenses: Office 2007 would replace Office 2003, and so on. But now it is a subscription-based suite, thanks to the emergence of Office 365. Cloud infrastructure is at the heart of Office 365, providing continuous updates