One of the design aims of the Java programming language was that it would be capable of developing snippets of program code known as applets which would be incorporated into Web pages. In the early period of Java's life the only browser that could properly process applets was HotJava. This was a browser developed by Sun Microsystems. A few months after the launch of Java, plug-ins allowed the more popular browsers to accept applets. Eventually, even plug-ins became redundant, since the mainstream browsers had applet support built in. This has meant that the HotJava browser has become marginalized, although it still has a life as a testbed for new Java ideas.