| A | B |
| Early Era | no payed or uniform police |
| Political Era | politicians controled police |
| Reform Era | politics taken out of policing |
| Community Policing Era | police-community collaboration |
| Rattle Watch | night watch system |
| Lynch Law | mob excution on the spot |
| Spoils system | politicians appoint "their" people |
| Vigilante Group | informal self-protection society |
| Uniform Crime Report-UCR | classifes and reports on crime |
| Wickersham Commission | found police ineffectiveness |
| Law Enforcement Assistance Administration | funds for crime prevention |
| Directed Patrol | targets hot spot or type of criminal |
| Problem-Oriented policing | emphasizes solving causes crimes |
| Broken windows theory | message that no one cares |
| Team Policing | group of officers assigned geographic area |