Java Plug-in Software is a software product from Sun Microsystems™, Inc. that allows enterprise web managers to direct Java Applets and JavaBeans™ components on their intranet web pages to run using Sun's Java Runtime Environment (JRE) instead of browser's default runtime.
The Java Plug-in was designed for enterprise customers who wish to deploy Java 2 SDK, Standard Edition v 1.2.2-based applets on their intranet web pages, and support Microsoft® Windows- and Solaris-based browsers in their enterprise.