Question: What is the organization abbreviated IKG that represents those who practice Judaism in Austria?

Context paragraphs:
Jews of Rusape: The Jews of Rusape, Zimbabwe are a group of people who practice Judaism.  Their observance of Judaism is generally in accordance with that of mainstream Judaism practiced in other countries with the exception of a few key aspects.  The Rusape Jews, believe that although Jesus was not the Messiah, he was a prophet.  They believe that he did not rise to heaven as is taught in Christianity, but was rather buried in Israel as a regular man.  The community's origins are attributed to an individual known as William S. Crowdy, who came to the community in the late 19th or early 20th century.

Lev L'Achim: Lev L'Achim (Hebrew: לב לאחים‎ ‎ , "heart for brothers") or P'eylim Lev L'Achim is an Orthodox Jewish organization operating in Israel.  It follows Orthodox Judaism, and works to move students from secular Israeli schools to schools based on the Torah and religious teachings.  It sends out senior yeshiva and kollel students to recruit Israeli children for religious elementary schools.  Like all kiruv organizations, its goal is to teach those who have grown up in a non-Orthodox Jewish environment how to practice Judaism.

Sephardic Jews in the Netherlands: As a result of the Alhambra Decree of 1492 and the Holy Office of the Inquisition, many Sephardim (Spanish and Portuguese Jews) left the Iberian peninsula at the end of the 15th century and throughout the 16th century, in search of religious freedom.  Some migrated to the newly independent Dutch provinces which welcomed the Sephardic Jews.  Many of the Jews who left for the Dutch provinces were crypto-Jews, persons who had converted to Catholicism but continued to practice Judaism in secret.  After they had settled in the safety of the Netherlands, many of them 'returned' fully to practice of the Jewish religion.

History of the Jews in Cuba: Jewish Cubans, Cuban Jews, or Cubans of Jewish heritage, have lived in the nation of Cuba for centuries.  Some Cubans trace Jewish ancestry to "Marranos" (converts to Christianity) who came as colonists, though few of these practice Judaism today.  More than 24,000 Jews lived in Cuba in 1924, and more immigrated to the country in the 1930s.  But during and after the 1959 communist revolution, 94% of the Jews left for the United States and other countries.  In 2007 an estimated 1,500 known Jewish Cubans remained in the country, overwhelmingly located in Havana.  Several hundred have since emigrated to Israel.

Karaite Jewish University: The Karaite Jewish University is a non-profit corporation incorporated in California, U.S.A., in November 2005 for the purposes of disseminating the study of Karaite Judaism.  Karaite Jewish University is not accredited as an academic institution.  However, it has been authorized by the Council of Sages of Universal Karaite Judaism to teach an Introduction to Karaite Judaism course, both for Rabbinic Jews wishing to affiliate formally with Karaite Judaism, as well as potential converts to Judaism according to Karaite practice.  Universal Karaite Judaism is the official body recognized by the State of Israel as representing Karaite Jews in matters of personal status.  The university's first “Introduction to Judaism” class began in February 2006 and ended in May 2007.  Ten of the graduates from the course converted to Judaism together with their children under the auspices of Congregation Bnai Israel of the Karaite Jews of America in Daly City, California, on July 30, 2007.  These were the first official sanctioned conversions to Judaism according to the Karaite rite since 1465.  On September 2, 2007, the university awarded an Honorary Doctorate degree in Education to Mourad El-Kodsi, historian and author of The Karaite Jews of Egypt and The Karaites of Poland, Lithuania, Russia & Ukraine.  El-Kodsi was named Dean Emeritus of the university whose function will be to mentor the university's graduate students.

History of the Jews in Austria: The history of the Jews in Austria probably begins with the exodus of Jews from Judea under Roman occupation.  Over the course of many centuries, the political status of the community rose and fell many times: during certain periods, the Jewish community prospered and enjoyed political equality, and during other periods it suffered pogroms, deportations to concentration camps and mass murder, and antisemitism.  The Holocaust drastically reduced the Jewish community in Austria and only 8,140 Jews remained in Austria according to the 2001 census, but other estimates place the current figure at 9,000, 15,000 and 20,000 people.

Racism in Spain: During the Spanish inquisition, Jews, Arabs, and Berbers were targeted the most.  This policy was called Limpieza de sangre "(Blood Cleansing)".  Even if a Jew, Arab, or Berber converted to Christianity, Spanish authorities during that time referred to them as New Christians, which were the target of institutional discrimination and suspicion by the Spanish Inquisition.  New Christians of Muslim heritage were referred to as "moriscos", meaning "Moor-like".  Those of Jewish heritage were termed Conversos and those who secretl continued to practice Judaism were referred to as "marranos" (either from Spanish "marrar" to err/deviate or from "marrano" meaning "swine".) .  After the Reconquista, many Mudéjars (individual Arabs and Berbers, who remained in Iberia after the Christian Reconquista but were not converted to Christianity remained in Spain as practicing Muslims and Sephardic Jews were required to convert to Catholicism or leave the country in 1492.  Attitudes towards Moriscos varied in different regions, although they were never the main target of the Inquisition.  A few decades after the War of the Alpujarras, during which the Muslim-majority population of Granada rebelled, the King of Spain ordered the Expulsion of the Moriscos from Spain, which was implemented successfully in the eastern region of Valencia and less so in the rest of Spain.

Gershom Sizomu: Gershom Sizomu (born 1972) is a Ugandan rabbi serving the Abayudaya, a Baganda community in eastern Uganda near the town of Mbale who practice Judaism.  Sizomu is the first native-born black rabbi in Sub-Saharan Africa.  He is also the first chief rabbi of Uganda.

Israelitische Kultusgemeinde Wien: The Israelitische Kultusgemeinde Wien (IKG) (Vienna Israelite Community) is the body that represents Vienna’s Orthodox Jewish community.  Today, the IKG has around 7000 members.  Throughout history, it has represented almost all of Austria's Jews, whose numbers are sufficient to form communities in only a few other cities in Austria.

Marrano: Marranos were Jews living in Iberia who converted or were forced to convert to Christianity yet continued to practice Judaism in secret.  The term specifically refers to the accusation of Crypto-Judaism, whereas the term converso was used for the wider population of Jewish converts to Catholicism whether or not they secretly still practised Jewish rites.  Converts from both Judaism or Islam were referred to by the even broader term "New Christians".

Supporting paragraphs: Israelitische Kultusgemeinde Wien History of the Jews in Austria
Answer: Israelitische Kultusgemeinde Wien