Performance of Jet, Missing Transverse Energy and Tau Reconstruction with ATLAS in pp Collisions at $\sqrt{s}$ = 7 TeV

Preliminary results of jet, missing transverse energy, and tau reconstruction and calibration with the ATLAS detector form proton-proton collisions at sqrt(s)=7 TeV are presented. Inputs to jet, tau, and missing $E_T$ reconstruction and calibration are studied and validated with data. The jet energy calibration is derived from simulated QCD dijet events and its uncertainty determined using a combination of Monte Carlo, data, and test-beam data measurements. The initial ATLAS jet energy scale is determined with an uncertainty smaller than 10% for jets with transverse momentum greater than 20 GeV.