The Bose–Chaudhuri–Hocquenghem Code (BCH code) is a type of error-correcting code used in digital communication systems. It helps ensure that data transmitted over noisy channels remains accurate by detecting and correcting errors. BCH codes are particularly useful in applications like CDs, DVDs, and QR codes, where data integrity is crucial. Developed by Raj Chandra Bose, Dwijendra Narayan Chaudhuri, and Alexis Hocquenghem, these codes are based on polynomial algebra over finite fields. They can correct multiple random errors, making them more powerful than simpler codes. This capability makes BCH codes a popular choice in modern technology for reliable data transmission.