Firewall: a hardware or software device which is configured to permit, deny, or proxy data through a computer network which has different levels of trust.

AntiVirus / AntiSpam: computer programs that attempt to identify, thwart and eliminate computer viruses, SPAM, and other malicious software (malware).

IDS / IPS: IDS, intrusion detection system, detects unwanted manipulations to an environment or network systems. IPS, intrusion prevention system, is a computer security device that monitors network and/or system activities for malicious or unwanted behavior and can react, in real-time, to block or prevent those activities.

UPS: also known as an uninterruptible power source or a battery backup is a device which maintains a continuous supply of electric power to connected equipment by supplying power from a separate source when utility power is not available.

BioMetrics: hardware or software systems that use physical human data to identify users and secure access to an environment.