"10-codes," also known as ten signals, are brevity codes used in voice communication, particularly by law enforcement and emergency services. These codes help convey information quickly and clearly over radio transmissions, reducing the chance of miscommunication. Each code typically starts with the number 10, followed by a specific word or phrase that represents a particular message. For example, 10-4 means "acknowledged," while 10-20 refers to a person's location. Although widely used, the adoption of 10-codes can vary by region and agency, leading to potential confusion. Some organizations have moved towards plain language to enhance clarity in communication.