Primary definition
Information technology; telecommunications; chemical; transportation systems, including mass transit, aviation, maritime, ground/surface, and rail and pipeline systems; emergency services; and postal and shipping. Source: NIST SP 800-30 Rev 1
Also known asCI sectors · critical infrastructure · CIS · key resources sectors · KR sectors
1 sources cited4 related termsReviewed Aug 9, 2026
— Committee on National Security Systems Glossary CNSSI 4009-2015View source
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CNSSGC
Information technology; telecommunications; chemical; transportation systems, including mass transit, aviation, maritime, ground/surface, and rail and pipeline systems; emergency services; and postal and shipping. Source: NIST SP 800-30 Rev 1
Committee on National Security Systems Glossary CNSSI 4009-2015 · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Critical Infrastructure Sectors. In Election Security Glossary. Retrieved August 22, 2026, from https://electionsecurityglossary.com/glossary/critical-infrastructure-sectors
Sources
1 cited · last checked Aug 9, 2026
01
Committee on National Security Systems Glossary CNSSI 4009-2015
Committee on National Security Systems Glossary CNSSI 4009-2015
Single-source
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