A modular computer includes a portable computer providing a first set of performance characteristics, an expansion module couplable to the bottom surface of the portable computer to provide, in combination therewith, a second set of performance characteristics, and a docking module couplable to the portable computer through the expansion module to provide, in combination therewith, a third set of performance characteristics. A method of altering the features of a portable computer includes providing a portable computer having a first set of features, operatively coupling the portable computer to a transportable base wherein the coupling provides a second set of features, and operatively connecting the portable computer through the transportable base to a stationary base, wherein the connecting provides a third set of features.