Yes, “10-4” is a military term that originated in the United States military and is still commonly used today. The term is a radio code that is used to indicate that a message has been received and understood.
The use of radio codes in the military dates back to the early 1900s, when the first radio communication systems were developed. These codes were developed to allow military personnel to communicate quickly and efficiently without revealing sensitive information to potential eavesdroppers.
Over time, a standardized set of radio codes was developed that could be used by military personnel across different branches and services. These codes are often referred to as “ten codes,” with each code beginning with the number 10. For example, “10-9” means “repeat your last transmission,” while “10-20” means “location.”
The code “10-4” specifically means “message received and understood.” It is often used as a response to a radio transmission to confirm that the message has been received and understood. For example, if a military unit receives an order to move to a new location, they might respond with “10-4” to indicate that they have received the order and understand what is required of them.
While the use of radio codes has declined somewhat in recent years due to advances in communication technology, “10-4” remains a common and recognizable term in both military and civilian contexts. It has become a part of popular culture and is often used in movies and TV shows to indicate agreement or understanding.
In conclusion, “10-4” is a military term that has its roots in radio communication codes. It is used to indicate that a message has been received and understood, and remains a common and recognizable term in both military and civilian contexts.