On-Premises 

You may not want your system “in the cloud”.  You want complete control over your data. While still a Web-Based LIS, your IT staff maintains the hardware, security, network and firewalls, and the operating system. 

On-Premises license as a “perpetual license”  that is:
A one-time fee is paid to license the software in perpetuity.  Only additional years of support are purchased annually and at your option.