IISF

The acronym IISF stands for

• "International Institute for Submarine Research", an institute founded in 1950 by Hans Hass in Liechtenstein, which was renamed in 2000 to "Hans Hass Institute for Submarine Research and Diving Technology" (HIST)
• Istituto Internazionale di Studi Federiciani , a research institute on the history of Staufer culture under Frederick II, based in Avigliano
• Istituto Italiano per gli Studi Filosofici , a non-university institute for philosophy based in Naples

This is a disambiguation page for differentiating between several terms identified with the same word.