The independent fragmentation (IF) approach dates back to the early seventies [Krz72], and gained widespread popularity with the Field-Feynman paper [Fie78]. Subsequently, IF was the basis for two programs widely used in the early PETRA/PEP days, the Hoyer et al. [Hoy79] and the Ali et al. [Ali80] programs. PYTHIA has as (non-default) options a wide selection of independent fragmentation algorithms.