Radio Codes:

10-1 unable to copy radio transmission
10-4 Acknowlegement - two officer unit
10-4+ Acknowlegement - three or more officer unit
10-7 out of service 
10-8 in service
10-22 disregard call/assignment
10-28 request vehicle registration information
10-29 request criminal record check on subject
10-30 subject has current/outstanding warrants
10-30-T subject has suspended license, no license, or other traffic related issue
10-33 emergency - officer needs assistance
10-50 motor vehicle accident
10-50-I motor vehicle accident with injuries
10-89 bomb-threat
10-99 Acknowlegement - one officer unit

Response Codes:

Code 1: Emergency lights/sirens activated
Code 2: Proceed directly to scene with no lights or sirens

Terms/Abbreviations:

APO: Assault on a Police Officer
ADW: Assault with Dangerous/Deadly Weapon
Apparent Natural: person apparently dead of natural causes
AWIK: Assault With Intent to Kill
The Block: Central Cell Block
The Board: Fire Department/EMS
CPWL: Carrying a Pistol Without a License
CCB: Central Cell-Block
CCN: Complaint Control Number, six digit report number
CDU: Civil Disturbance Unit, riot squad
CSOSA: Court Services and Offender Supervision Agency
EPRD: Emergency Psychiatric Response Division, MO holding facility
ERT: Emergency Response Team, SWAT team.
FTA: Failed To Appear (in court)
The General: DC General Hospital
GOA: Gone On Arrival
JOCC: Joint Operations Command Center
MDT: Mobile Data Terminal,in-car computer
MO: Mental Outpatient, subject mentally ill
NCIC: National Crime Information Center
No Permit: no drivers license
PBS: Pocket Book Snatch
POCA: Possession of Open Container of Alcohol
PWID: Possession With Intent to Distribute
SOCC: Synchronized Operations Command Center
SOD: Special Operations Division
SOW: Sent On Way
UCSA: Uniform Controlled Substance Act
UUV: Unauthorized Use of a Vehicle
WALES: Washington Area Law Enforcement System