| BR | Brigate Rosse (Red Brigades) |
| CISL | Confederazione Italiana di Sindacati Lavoratori (Italian Confederation of Worker’s Unions) |
| DC | Democrazia Cristiana (Christian Democratic Party) |
| ENI | Ente Nazionale Idrocarburi (Italian state energy company) |
| FGCI | Federazione Giovanile Comunista Italiana (Italian Communist Youth Federation) |
| FUCI | Federazione Universitaria Cattolica Italiana (Italian Catholic University Association) |
| FUORI | Fronte Unitario Omosessuale Rivoluzionari Italiani (United Homosexual Front of Italian Revolutionaries; the acronym spells the word for “out”) |
| INA | Istituto Nazionale delle Assicurazioni (National Insurance Institute; a branch of this organization, INA Casa, was the national housing authority in postwar Italy) |
| P2 | Propaganda Due, a secret Masonic influence-trafficking organization exposed in the 1980s, with ties to the Italian government |
| PCI | Partito Comunista Italiano (Italian Communist Party) |
| PDS | Partito Democratico della Sinistra (Democratic Party of the Left) |
| PSIUP | Partito Socialista Italiano di Unità Proletaria (Italian Socialist Party of Proletarian Unity) |
| RAI | Radio Audizioni Italiane (the state television and radio broadcaster) |