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With Java, the server sends the browser an "applet" (small application program) that the browser then interprets and runs on a built-in or add-on Java interpreter. Only the interpreter has to be customized to the specific type of computer. The applet is the same whether you're on a PC, a Mac, or a workstation; it's "platform independent." Furthermore, the interpreter includes security features to prevent the applet from damaging any files or values on your computer. The applet is also smaller and therefore quicker to send than detailed step-by-step instructions for each type of system. Most major browser programs now include or have promised to support the necessary Java player modules. Sun is also developing a line of processor chips that will execute Java code directly without the need for an added interpreter. An increasing number of companies are also promising or delivering tools for programming in Java. But Microsoft is also promoting a competing technology ("ActiveX"), and it remains to be seen whether Sun can actually deliver a system without security loopholes.
