An applet is a Java program that is loaded, executed and displayed by a Web browser application. Applets are often of modest size and complexity, to minimize the download times for users with low-bandwidth connections. However, when Web browsers are enhanced with the support of a Java plug-in, larger and more complex applications may be developed. This is possible because the Java plug-in makes it possible to cache the applet class files on the client machine – thus minimizing load times for the applet subsequent to the initial load. The Java plug-in also makes it possible for applets to execute outside of the low-headroom memory constraints imposed by the browser applications. This allows the applet designer to develop larger and more fully featured applets.