NMS

[Jason Yan]

Stands for Network Management System. An NMS is a system designed for monitoring, maintaining, and optimizing a network. It includes both hardware and software, but most often an NMS refers to the software used to manage a network.
Network management systems provide multiple services. These include, but are not limited to:
In small networks, such as a residential or home network, an NMS is not necessary. However, it is important for any large network, such as those found in enterprise configurations. Server farms, data centers, and corporate networks may have hundreds or thousands of connected devices. It is important to have a central network monitoring system in place to manage the devices. An NMS provides and efficient way to locate, update, repair, and replace network equipment as needed.
OpenNMS Horizon network management interface

[Michiko]

Short for [Not Mind Safe] (and not for [Not My Style], what kind of lame street phrase is that anyway). Indicates content that so disturbing it should be forever left unseen. Used as an extreme warning for images whose full horror is not covered by [NWS] (Not Work Safe).

[Tanya Shivari]

→  the National Market System