The Computers: (Security Computers )

Concerns the protection of system resources and data from unauthorized use or access in stand alone or networked environments. Security measures are implemented through a combination of software, hardware and physical restrictions. They can operate across different selections of content from individual files up to an entire networked enterprise. Tools used to secure systems environments include authentication systems, intrusion detection systems, firewalls, anti-virus software, biometrics, virtual private networks and cryptography. Security Computers.

Perception of security may be poorly mapped to measurable objective security. For example, the fear of earthquakes has been reported to be more common than the fear of slipping on the bathroom floor although the latter kills many more people than the former. (wikipedia)