Jargon
Initialisms, Acronyms, and Abbreviations
Police Ranks/Roles
PCPolice Constable
PCSO
Police Community Support Officer
FLO
Family Liaison Officer
DC
Detective Constable
DS
Detective Sergeant
DI
Detective Inspector
DCI
Detective Chief Inspector
DetSup/DSI
Detective Superintendent
DCS
Detective Chief Superintendent
ACC
Assistant Chief Constable
DCC
Deputy Chief Constable
CC
Chief Constable
AFO
Authorised Firearms Officer
TFC
Tactical Firearms Commander
SFO
Specialist Firearms Officer
The Metropolitan Police (Met) and the City of London Police in London have additional ranks, such as Commissioner and Commander, with associated assistants and/or deputies.
Misc
ARU
Armed Response Unit
ARV
Armed Response Vehicle
NCA
National Crime Agency (formerly SOCA)
SOCA
Serious and Organised Crime Agency
RTC
Road Traffic Collision
PNC
Police National Computer
HOLMES
Home Office Large Major Enquiry System
ANPR
Automatic Number Plate Recognition
SOCO
Scenes Of Crime Officer
CSI
Crime Scene Investigations
CID
Criminal Investigation Department
CPS
Crown Prosecution Service
There are many, many more, though the majority are less widely used.