| 10-2 | good signal, now usually used to mean simply "good." |
| 10-4 | acknowledged, frequently used to indicate agreement. |
| 10-5 | relay. |
| 10-6 | busy (as in doing cop work), often used as a "do not disturb" sign on the radio. |
| 10-7 | temporarily out of service (as in lunch). |
| 10-8 | back in service (as in done with lunch). |
| 10-9 | repeat. |
| 10-10 | fight. |
| 10-13 | weather and road conditions. |
| 10-16 | domestic case. |
| 10-20 | location |
| 10-21 | telephone, as in "ten-twenty-one the office." |
| 10-22 | disregard. |
| 10-23 | arrived at scene. |
| 10-24 | assignment completed. |
| 10-25 | report in person to meet, usually used simply as "meet." |
| 10-27 | operator's license information. |
| 10-28 | vehicle registration information. |
| 10-29 | check records for stolen; modern usage also means "warrant" or "wanted." |
| 10-32 | suspect with gun, also used in reference to knives and other devices. |
| 10-33 | emergency. |
| 10-46 | disabled vehicle. |
| 10-50 | motor vehicle crash. |
| 10-51 | wrecker. |
| 10-52 | ambulance. |
| 10-55 | dwi |
| 10-56 | intoxicated pedestrian. |
| 10-61 | personnel in area, frequently used to indicate that a civilian can hear the radio. |
| 10-70 | fire. |
| 10-76 | en route. |
| 10-78 | need assistance. |
| 10-79 | notify medical examiner, also used to indicate a deceased subject. |
| 10-80 | high-speed pursuit |
| 10-96 | mentally disturbed subject. |