- Fidelity Security Systems Inc.
 - Sales, installation, and service of alarm systems, fire alarms, card access, CCTV, telephone entry, intercoms, and locks. Also provides 24-hour monitoring. - Huronia Alarm
- Sells, installs and services security and fire alarm systems.
- NASA Security & Alarm
- North Shore Alarms & Telecom
- Offers a range of products and services emphasizing customisation and integration, including telephone, voice processing, access, and surveillance systems.
- Secutron Inc.
- Manufacturer of electronic protection systems, including fire alarm control panels, central station equipment and other life and property safety products.
- Microtec Security
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