An organ trio is a musical ensemble typically consisting of a Hammond B-3 organ player, a drummer, and a guitarist. It is a classic format for jazz and blues music, popularized in the 1950s and 1960s. While the term "organ trio" is most commonly used to describe this specific combination of instruments, there are other synonyms that can be used depending on the specific instrumentation. For example, a "guitar organ drums" trio could be described as a "guitar trio with organ and drums." Similarly, a "keyboard bass drums" trio could be called an "electric keyboard trio" or a "fusion trio".