Java Applets run in a womb provided by the web browser that offers them services, and
prevents them from doing anything naughty such as file I/O or talking to strangers
(servers other than the one the Applet was loaded from). The analogy of Applets being
like children lead to calling the environment they run in the sandbox. A sandbox is a safe place for children to play. Sandbox is
also an irreverant term for any company’s R & D department.