Office Web Apps Server was launched in 2012 to provide browser-based versions of Word, PowerPoint, Excel and OneNote running on a standalone on-premises server. The Web Apps later changed their name to Office Online and now the server follows suit – Office Online Server (OOS) is now in preview as the successor to Office Web Apps Server, but there’s no word yet on whether the licensing changes.

Find the announcement here: http://bit.ly/1YKdwpX.