LSD radix sort is a long-established sorting method that processes numbers from their least significant digit to their most significant digit, with base 10 referring to the familiar decimal digits. An in-place version aims to perform the same ordering without relying on a separate large auxiliary array, which makes it an interesting case for programmers and students. Online, the label is used for short clips and visualisations that demonstrate the method step by step, and it remains useful because it turns a textbook procedure into something listeners can follow by ear as well as by sight.