Microsoft provided to it’s partners a few of graphs illustrating the calendar of releases prepared for some of the most important products of the company: Microsoft Office 15, Internet Explorer 10 and even Windows Phone.

The images dating back to December of last year do not offer too many details about the Windows 8 operating system, and for Windows Phone the information is pretty vague, as only “new investments” are mentioned for the second part of this year. This might “hide” some updates for the Windows Phone Tango OS or something completely different, like the release of the Windows Phone 8 operating system, codename Apollo.

The chart for Internet Explorer 10 shows that the new web browser might be released at any moment. Still, Microsoft has not officially confirmed the plan of a IE10 version for Windows 7. Actually, Microsoft did not release anything new after the Internet Explorer 10 Preview build, which was released in June of last year.

According to the chart, Internet Explorer 10 should be ready in the summer of this year.

There is no exact release date for the Office 15 suite, and only steps of the development process are being mentioned. The chart however indicates the general availability of Office 15 products for the first part of 2013, so the release should take place by the end of this year.

Lync Server 15 is the one Office 15 product that is missing from this calendar. The chart mentions the Lync Online component, and it suggests that Microsoft will opt for a “cloud only” version for this edition. Still, some rumors say that Lync Server 15 might be released in full but it might suffer some delays.

In an attempt to clarify the nature of the information presented in these charts, a Microsoft spokesman said that the data provided in these chats are only estimates presented to Microsoft’s partners and they do not represent the final release dates or a definite release calendar.