Joseph Moiseyevich Schillinger (1895-1943) was a Russian-American composer, theorist, and educator, primarily known for his contributions to the field of music theory and composition. His work is often associated with the genre of classical music, though he also explored popular music forms. Schillinger is best known for developing the Schillinger System of Musical Composition, a comprehensive method that aimed to systematize music creation through mathematical principles and patterns. This approach influenced numerous composers and musicians, including George Gershwin and Leonard Bernstein, and has been regarded as a precursor to various modern compositional techniques. Notable works include his compositions for piano and orchestra, as well as educational texts that detail his system. His influential writings, such as "The Schillinger System of Musical Composition," continue to be referenced in music education and theory. Schillinger's impact on music can be seen in the way he bridged the gap between theoretical frameworks and practical application, encouraging musicians to explore new creative avenues. His legacy persists today in contemporary composition and music analysis, marking him as a significant figure in 20th-century music history.