Released in 2006, the XR-1 was General Dynamics' flagship Ultra Rugged Notebook designed for military, law enforcement and commercial use.  Now a decade has passed, and the original component specs of the XR-1 have long since started faded into history...but the design still holds true.  This is due to a rhobust design philosophy:  from the honest materials used throughout (magnesium chassis for strength with a TPU wrap for bounce and radio - clarity) to a timeless form language which speaks of premium quality and ruggedness in the same breath.