Hungarian Quantum Chemistry: Part A - Early and Recent History , Volume 93 in the Advances in Quantum Chemistry series, highlights the historical and contemporary contributions of scientists to the field of molecular electronic structure theory. Chapters in this new release include Pioneering attempts in Hungary on treating quantum systems, The Early History of Hungarian Quantum Chemistry: From Physics to Applications in Chemistry and Biology, Contributions of Edward Teller to Molecular Quantum Theory, Quantum Chemistry at the Eötvös Loránd University (Budapest) between 1962 and 1982, and Gödel's argument, human intelligence and the electronic structure of the substrates of life - the legacy of Janos Ladik. Additional chapters cover István Mayer -- chemical concepts in quantum chemistry, János Ángyán, a European Career, Weaving the Fabric of Quantum Chemistry: Hungarians' Contributions at Home and Abroad, Fifty-five Years of Quantum Chemistry, Kállay Laboratory, Molecular Quantum electro-Dynamics Research Group in Budapest, and The Szalay Group at ELTE.