North American Industry Classification System 2022International Standard Industrial Classification of All Economic Activities, Rev.4
NAICS 2022 561621 to ISIC Rev 4
Crosswalk mapping from NAICS 2022 561621 "Security Systems Services (except Locksmiths)" to ISIC Rev 4. 1 official equivalence.
NAICS 2022 561621 in ISIC Rev 4
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About NAICS 2022 561621
561621 Security Systems Services (except Locksmiths)This U.S. industry comprises establishments primarily engaged in (1) selling security alarm systems, such as burglar and fire alarms, along with installation, repair, or monitoring services or (2) remote monitoring of electronic security alarm systems. Cross-References. Establishments primarily engaged in--