Microsoft Office 2016 Public Preview is now available

http://www.engadget.com/2015/05/04/microsoft-office-2016-public-preview/?ncid=rss_truncated

Microsoft one-ups Google Docs with real-time editing in Office 2016 http://www.theverge.com/2015/5/4/8547433/microsoft-office-2016-real-time-co-authoring-features