SONAR has gone through several different evolutions since its initial release. As of October 2011, you can purchase the fourth generation of this software. SONAR uses several different approaches to improve its security protection including download “insight and reputation technology.” The system not only looks at how your computer executes processes but what kind of communication characteristics your computer has. By finding these traits, SONAR can capture and contain threats to your system. The latest version, SONAR 4, can also protect your system from non-process threats, threats that introduce themselves into active and legitimate processes.