This document discusses sandbox technology as a security mechanism. It defines a sandbox as separating running programs in a virtual environment so that actions of suspicious viruses will not affect the system. It explains that sandbox monitors operations of suspicious programs run within it, so that no permanent changes are made to the user's system. Sandbox technology provides a safer way to execute untested or untrusted code compared to relying solely on virus scanners. It notes Norman as the first company to introduce this sandbox technology.