Categories
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The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2001 Series (1 member)
- Acoustic Technology, Incorporated (7 members)
- Alerting Communicators of America (13 members)
- American Signal Corporation (11 members)
- Asian Sirens (14 members)
- British Sirens (3 members)
- California systems (1 member)
- City systems (6 members)
- Coded Sirens (11 members)
- Company pages (60 members)