Another reality based television series from Jack Webb (Dragnet, Emergency), Adam-12 was the first TV series to more realistically portray the joys & frustrations of being a police officer in the late 1960's-early 1970's. This attention to detail made the show a catalyst for uncounted numbers of people to enter law enforcement agencies when they became adults.
Adam-12 was the radio call number of the unit that Malloy & Reed worked. In Los Angeles, the first digit (1), represented the division assigned. "Adam" is the LAPD designation for a 2-person patrol unit; "12" was the beat area assigned. Although, Malloy & Reed could be seen patrolling the streets anywhere in L.A. from Downtown to the Valley, they retained the number division #1, no matter where they were. In reality, you work the same district each day and are assigned a zone in that district.
The police station used throughout the series was the newly-built (at the time) Rampart Station.