Subluxation: Partial dislocation of a joint. A complete dislocation is a luxation.
The largest number of items per content database that has been tested on SharePoint Server 2013 is 60 million items, including documents and list items. If you plan to store more than 60 million items in SharePoint Server 2013, you must deploy multiple content databases.
To co-author with others, you need: A shared storage area OneDrive, OneDrive for Business, SharePoint Online and SharePoint Server are shared storage areas which enable co-authoring. Apps that support co-authoring Word and PowerPoint on all devices and versions more recent than Office 2010 support co-authoring.