James E. "Jimmy" Smith (1925-2005) was a pioneering American jazz organist known for his innovative use of the Hammond B-3 organ. Primarily associated with the jazz and soul jazz genres, Smith's playing style incorporated elements of blues, gospel, and bebop, significantly influencing the sound of jazz organ music. His notable works include albums such as "The Sermon!" (1964), "Back at the Chicken Shack" (1963), and "Prayer Meetin'" (1963). Smith's collaborations with prominent musicians, including guitarist Wes Montgomery and saxophonist Lou Donaldson, further established his reputation in the jazz community. Smith's impact on music is profound; he transformed the role of the organ in jazz, making it a central instrument in small groups and paving the way for future organists. His rhythmic precision, improvisational skills, and ability to blend different musical styles have left a lasting legacy, influencing generations of musicians across various genres. Smith’s work remains a cornerstone in the evolution of jazz organ, making him a key figure in the genre's history.