Public enemy it to describe various notorious fugitives they were pursuing throughout the 1930s. Unlike Loesch's use of the term, the FBI's "Public Enemies" were wanted criminals and fugitives who were already charged with crimes. Among the criminals whom the FBI called "public enemies" were John Dillinger, Baby Face Nelson, Bonnie and Clyde, Pretty Boy Floyd, Machine Gun Kelly, Ma Barker, and Alvin Karpis. The term was used so extensively during the 1930s that some writers call that period of the FBI's early (the BOI became the FBI in 1935) history the "Public Enemy Era". Dillinger, Floyd, Nelson, and Karpis, in that
Public Enemy No. 1 (street gang) to law enforcement officials requesting that their personal information be removed so that it can't be used by gang members to identify home addresses of police officers. The gang uses the numeric symbol "737" to indicate association with the gang. The numbers correspond to the letters P, D, and S on a telephone keypad. The initials stand for PENI Death Squad, another name for the group. Members often mark themselves with tattoos of different acronyms for the gang. Designs commonly include the words "PENI", "PDS" or the numbers "737", and sometimes in the form of runes, such as "ᛈᛖᚾᛁ" (PENI)