Annex B: Acronyms Annex B: Acronyms Department for Business, Energy and Industrial Strategy CERT-UK Computer Emergency Response Team UK CISO Chief Information Security Officer CNC Civil Nuclear Constabulary CNI Critical National Infrastructure CPNI Centre for the Protection of National Infrastructure CNS Civil Nuclear Sector IT Information Technology NCSC National Cyber Security Centre NCSS National Cyber Security Strategy NCSP National Cyber Security Programme NDA Nuclear Decommissioning Authority ONR Office for Nuclear Regulation OT Operational Technology SIA Security and Intelligence Agencies W ith dr aw n BEIS 24