Sharing Indicator : White Essential Cybersecurity Controls Appendix (B): List of the Abbreviations Table (3) below shows some of the abbreviations and their meanings which are used in this document. Table (3): List of Abbreviations Abb. Full Term APT Advanced Persistent Threat BCM Business Continuity Management BYOD Bring Your Own Device CCTV Closed-Circuit Television CNI DNS Domain Name System ECC Essential Cybersecurity Controls HTTPS Hyper Text Transfer Protocol Secure ICS Industrial Control System ICT Information and Communication Technology IT MFA OT SIEM SIS SLA 36 Critical National Infrastructure Information Technology Multi-Factor Authentication Operational Technology Security Information and Event Management Safety Instrumented System Service Level Agreement Document Classification: Unclassified