  The production of forward jets has been measured in deep inelastic ep
collisions at HERA. The results are presented in terms of single differential
cross sections as a function of the Bjorken scaling variable (x_{Bj}) and as
triple differential cross sections d^3 \sigma / dx_{Bj} dQ^2 dp_{t,jet}^2,
where Q^2 is the four momentum transfer squared and p_{t,jet}^2 is the squared
transverse momentum of the forward jet. Also cross sections for events with a
di-jet system in addition to the forward jet are measured as a function of the
rapidity separation between the forward jet and the two additional jets. The
measurements are compared with next-to-leading order QCD calculations and with
the predictions of various QCD-based models.
