ABI: Association of British Investigators
API: Association of Professional Investigators
APII: Association of Personal Injury Investigators
ASIS: American Society for Industrial Security
BAIPS: British Association of Investigators and Process Servers
BUSIER: British Security Industry Association
CBA: Certificated Bailiffs Association
CSA: Credit Services Association
EPIC: Ex-Police in Industry and Commerce
FSB: Federation of Small Business
HTCIA: High Technology Crime Investigation Association
IAATI: International Association of Auto Theft Investigators
IPI: Institute of Professional Investigators
IPSA: International Professional Security Association
ISSA: Information Systems Security Association
IWWA: Investigations Worldwide Association
LPIA: Louisiana Private Investigators Association
NAIPS: National Association of Investigators and Process Servers
NALI: National Association of Legal Investigators
NAPPS: National Association of Professional Process Servers
NARPO: National Association of Retired Police Officers
NCISS: National Council of Investigation & Security Services
PIAM: Professional Investigators Alliance of Maryland
SAS: Security Association Singapore
SIA: Security Industry Authority
SIT: Special Investigation Team
SOA: Sheriffs Officers Association
UKPIN: United Kingdom Professional Investigators Network
WAD: World Association of Detectives
WAPI: World Association of Professional Investigators
WIN: World Investigators Network