Abstract: Forward calorimetry completes the nearly 4 coverage for high pT hadronic events in the ATLAS detector at the LHC. Both the deployment and the technology of the forward calorimeters (FCal) in ATLAS are novel. The FCal physics goals and performance requirements focus on missing ET and tagging jets. The placement of the FCal relatively close to the interaction point provides many advantages including nearly seamless calorimetry and natural shielding for the muon system. The liquid argon rod/tube electrode structure for the FCal was invented specifically for applications in high rate environments. Recent electron test beam results of an EM prototype show linearity of response better than 1% with energy and angle, energy resolution with a constant term less than 4% with Gaussian tails, and position resolution of order 1 mm.