Electronic Security Systems (ESS) are physical security systems deployed to integrate into a facility's necessary level of protection. Types of ESS: Physical Access Control Systems (PACS) Video Surveillance Systems (VSS) that are also known as CCTV. Intrusion Detection Systems (IDS)

Security System means a computer, computer system, network, or computer property that has some form of access control technology implemented, such as encryption, password protection, other forced authentication, or access control designed to keep out unauthorized persons

A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary or property damage, as well as against intruders.