Whenever the resource state changes, the "notifier" sends a new NOTIFY message to the "subscriber". It included a new software update notifier application. SVN Notifier is a tool to monitor one's Subversion project repository for changes. However, the Conversation Tracker is a notifier of new comments. These preemption applications often include an illuminated "notifier" signal. It also owned the fire alarm companies Fire-Lite and Notifier. The protocol for each notifier differs because each situation is unique. Fire-Lite is part of the Honeywell Life Safety Group, along with Notifier. The "notifier" is the person who delivers the death notice. Some devices made by Notifier are the NBG-12 and BNG-1 (also known as the BG-8).