NSAPI Plug-ins
Applications that use NSAPI are referred to as NSAPI plug-ins. Each plug-in implements one or more Server Application Functions (SAFs).
To use a SAF, an administrator must first configure the server to load the plug-in that implements that SAF. This is typically controlled by a configuration file named magnus.conf. Once the plug-in is loaded, the administrator can configure when the server should invoke the SAF and what parameters it should be passed. This is typically controlled by a configuration file named obj.conf.
Read more about this topic: Netscape Server Application Programming Interface