LOW-x FINAL STATES AT HERA

In this lecture we present data on hadronic final states from electron-proton reactions at low Bjorken x, taken by the two colliding beam experiments H1 and ZEUS at HERA. The data are discussed in the context of a variety of QCD-based models, which allow for a detailed study of the QCD dynamics in the production of partons and their fragmentation into hadrons. The HERA data fully support the perturbative approach of the DGLAP evolution scheme, although some hints may be visible in certain kinematic regions for the need of alternative formulations, such as BFKL dynamics.