It's been roughly two months since Microsoft Office 2010 made its debut in stores but it seems work on its successor is already underway. Not much is known about the next Office productivity suite, naturally, since it's still in a very early development stage. However, Russian website Wzor is offering 'proof' that the software does exists by posting what appears to be pre-alpha builds of Office 15 available internally in Redmond.

Wzor claims the next major iteration of Microsoft's productivity suite is slated for release in 2014, presumably months after launching Windows 8, so new features and direction of development probably won't be clear for a while. However, in the current build, there's a new element of application development named "Microsoft Limestone Application Integration" or simply "Microsoft Lime." According to Softpedia, the software giant also appears to have integrated a KMS activator into Office 15, making it easier for companies using volume licenses to activate their installations quickly.