A line of servers from IBM.  Introduced in 2015, LinuxONE models are based on the IBM Z mainframe platform.  More economical than the Z mainframes, LinuxONE machines were designed for cloud-based services.  There are more than a dozen LinuxONE Emperor and Rockhopper models.  See 
IBM Z and 
IBM.
The LinuxONE Emperor
These models are capable of running thousands of virtual machines or containers while providing built-in crypto processors for handling secure transactions.  (Image courtesy of IBM.)