!!! Overview[1]
[{$pagename}] ([Operating-system-level virtualization]) is a computer [virtualization method] in which the kernel of an [Operating System] allows the existence of multiple isolated user-space instances, instead of just one. 

Such instances, which are sometimes called [containers]

!! [{$pagename}] [Examples] 
* [XEN]
* [Docker]
* Linux-VServer

[{$pagename}] allow the standardization the environment and abstracting away the specifics of the underlying [Host] ([Operating System] and hardware).

[Container Orchestration] allow the standardization [Data Center] abstracting away the specifics of which [Host] and how the [Container] will be started, monitored, and killed.

!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [Operating-system-level_virtualization|Wikipedia:Operating-system-level_virtualization|target='_blank'] - based on information obtained 2017-07-11-