Measurements of charm production in ep collisions at a centre of mass energy of \sqrt {s}=318 GeV performed by the ZEUS and H1 experiments at HERA are presented. Final states containing D mesons are used to identify charm production. Measurements cover both the photoproduction (\gamma p), i.e. Q2\sim 0, and deep inelastic scattering (DIS), { i.e.} large Q2, kinematic regimes. Experimental results are compared to QCD predictions.
PACS numbers: 13.60.Hb
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