| CAID | Child Abuse Image Database |
| CEOP | Child Exploitation and Online Protection Centre |
| CHIS | Children’s Charities’ Coalition on Internet Safety |
| CICA | Criminal Injuries Compensation Authority |
| CRI | Child Redress International |
| CSA | child sexual abuse |
| CSAE | child sexual abuse and exploitation |
| CSAI | child sexual abuse imagery or images |
| CSAM | child sexual abuse material |
| CSEA | child sexual exploitation and abuse |
| CSP | communication service provider |
| DCMS | Department for Digital, Culture, Media & Sport |
| DEA | Digital Economy Act 2017 |
| ERSOU | Eastern Region Specialist Operation Unit |
| ESP | electronic service provider |
| GCHQ | Government Communications Headquarters |
| GDPR | General Data Protection Regulation |
| ICAT | Internet Child Abuse Team |
| ICO | Information Commissioner’s Office |
| IPCC | Independent Police Complaints Commission |
| ISP | internet service provider |
| IWF | Internet Watch Foundation |
| JSaRC | Joint Security and Resilience Centre |
| KIRAT | Kent Internet Risk Assessment Tool |
| MLAT | Mutual Legal Assistance Treaty |
| MPS | Metropolitan Police Service |
| NCA | National Crime Agency |
| NCMEC | National Center for Missing & Exploited Children |
| NGO | non-governmental organisation |
| NPCC | National Police Chiefs’ Council |
| NSPCC | National Society for the Prevention of Cruelty to Children |
| NUWG | National Undercover Working Group |
| PTF | Police Transformation Fund |
| REA | Rapid Evidence Assessment |
| ROCUs | Regional Organised Crime Units |
| SOCA | Serious and Organised Crime Agency |
| UCOL | Undercover Online |
| UKCIS | UK Council for Child Internet Safety |
| URL | uniform resource locator |