Socialist Party of Italian Workers

Socialist Party of Italian Workers (Partito Socialista dei Lavoratori Italiani, PSLI) is the name for a political party that has been used by three distinct organizations of the political left in Italy.

Italian Socialist Party (1893–1895)
PSLI was the first name of the Italian Socialist Party (Partito Socialista Italiano, PSI) from 1893 to 1895.

Unitary Socialist Party (1925–1927)
The most well known usage of PSLI was as the name of the Unitary Socialist Party (Partito Socialista Unitario, PSU) from 1925 to 1927.

Italian Democratic Socialist Party (1947–1951)
PSLI was the name of the Italian Democratic Socialist Party (Partito Socialista Democratico Italiano, PSDI) from 1947 to 1951.