Polish Society of Arts and Sciences Abroad (PTNO, Polish: Polskie Towarzystwo Naukowe na Obczyźnie) is a Polish learned society located in London in the Polish Social and Cultural Association building. It was established in 1948 and its aim is to represent and support members of Polish academia who live and work abroad.

• Tadeusz Brzeski (1950–1958)
• Tadeusz Sulimirski (1958/1959)
• Władysław Folkierski (1959–1961)
• Bronisław Hełczyński (1961–1965)
• Jakub Rostowski (1965/1966)
• Bronisław Hełczyński (1966–1978),
• Tadeusz Sulimirski (1978–1980)
• Tymon Terlecki (1980/1981)
• Edward Szczepanik (1981–2003)
• Stanisław Portalski (2003–2011)
• Bolesław Indyk (2011–present)

• Stanisław Portalski (2009). Zarys historii Polskiego Towarzystwa Naukowego na Obczyźnie. PTNO. ISBN 978-1-870027-47-2.
• Tadeusz Radzik, Sześćdziesiąt lat w służbie nauki. Polskie Towarzystwo Naukowe na Obczyźnie 1948-2008, Uniwersytet Marii Curie-Skłodowskiej w Lublinie. Presented at II Kongres Polskich Towarzystw Naukowych na Obczyźnie, 2008

• Official homepage

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