TIGR is also an acronym for The Institute for Genomic Research

TIGR, abbreviation for Trst (Trieste), Istra (Istria), Gorica (Gorizia) and Reka (Fiume-Rijeka), was a ultranationalistic Slovene organization of Primorje Slovenes (Primorski Slovenci) active between 1927 and 1941 with anti fascist and anti Italian attacks. Many members of this organization were connected with Yugoslavian and British intelligence services and many of them were military trained. The organization wasn't invited to join the OF (Liberty front) of Slovenes nation in 1941 but many members of TIGR later in 1943, after the capitulation of Italy, joined Slovene partisan's brigades, specially to Oversea brigades (Prekomorske brigade).

In 1930 the Italian fascist police discovered some TIGR's cells and four members (Ferdo Bidovec, Fran Marušič, Zvonimir Miloš and Alojzij Valenčič), judged responsable of various bomb attacks to institutions and newspapers, with civil victims, were condamned and executed at Basovizza -Bazovica . When Mussolini visited Caporetto-Kobarid in 1938 some members of TIGR planned an attempt on his life, which did not succeed. In 1941 nine members of TIGR were condamned for war-spionage and terrorism, five of them (Pinko Tomažič, Viktor Bobek, Ivan Ivančič, Simon Kos and Ivan Vadnal) were also executed in Villa Opicina-Opčine. Although organization stopped to operate the Communist party of Slovenia (KPS) constantly very carefully monitored over the actions of some TIGR's individual members.

In 1997 on a behalf of the 50th anniversary of annexation of Primorje to the mainlaind of Slovenia organization TIGR was awarded by the former communist president of Slovenia Milan Kučan with the Golden Honourable Mark of Freedom of the Republic of Slovenia (Zlati častni znak svobode republike Slovenije)