Definition / Belongs to this divisionThis division includes:
- direct and remote monitoring of electronic security alarm systems, such as burglary and fire alarms, including installation and maintenance, if not performed separately
- installation, repair, conversion and adjustment of mechanical or electronic locking devices, safes and vaults in connection with subsequent monitoring and remote monitoring

Organizations engaged in this activity may also sell security systems, mechanical or electronic locks, safes and vaults.
It does not belong to this sectorThis division excludes:
- installation of security systems without monitoring, remote monitoring, see 43.21
- specialist sale of security systems, mechanical or electronic locking devices, safes and vaults without supervision, installation and maintenance, see 47.59
- security advice, see 74.90
- ensuring public safety, public order, see 84.24
- key copying, see 95.29

Definition / Belongs to this divisionThis division includes:
- investigative activity
- all activities related to private investigation, regardless of the client or the purpose of the investigation
It does not belong to this branch - Hungarian supplementThis division excludes - Hungarian supplement:
- investigation in the framework of public order, public security, see 84.24