Applets
An applet is Java GUI program, embedded in a Web page (an HTML document).
Typical browsers (Internet Explorer, Netscape) incorporate a Java Virtual Machine.
The class file for the applet is stored in the Web Server’s document directory, alongside normal HTML files and other downloadable data.
An applet class will be dynamically loaded into the browser’s JVM the first time it encounters an HTML <APPLET> or <OBJECT> tag requiring that class. Hence the applet is executed on the client.
These tags can appear in any normal HTML document.