It is possible to study the low x behavior of the proton structure at HERA for x values as low as \sim 10^-5. One of the most interesting aspects of low x proton structure is the study of QCD dynamics - the evolution of partons between kinematic regimes. In ep DIS, this can be studied inclusively by measuring the proton structure functions - F₂, F_L,  etc.}, or exclusively by studying processes in the target region of the proton - forward going jets and particles. In this paper, various measurements made at HERA by the H1 and ZEUS experiments are presented and compared to MC models and fixed-order QCD calculations. While DGLAP-based evolution is able to describe the inclusive, i.e. F₂, data over the whole HERA kinematic region, a consistent picture of deviations from DGLAP models and fixed-order calculations in exclusive measurements is emerging. MC models and calculations based on BFKL or BFKL-like x-dependent parton evolution are able to describe most of the exclusive results.

PACS numbers: 12.38.Qk, 13.60.Hb