Scalable Performance on a Distributed Shared-Memory Machine.

A reversible cable reel which includes two cover shells having a respective center shaft axially connected to each other, two cable wheels respectively mounted around the center shafts inside the cover shells, two spiral springs respectively mounted around the center shafts inside the cover shells, each spiral spring having an inner end connected to the respective cover shell and an outer end connected to the respective cable wheel, two cables respectively wound round the cable wheels, each cable having a fixed end fastened to the respective cable wheel and a free end extended out of the respective cover shell and mounted with a module plug, a first terminal unit mounted in one cable wheel and connected to conductors in one cable, a second terminal unit mounted in the other cable wheel and connected to conductors in the other cable and separated from the first terminal unit by a cover plate, the second terminal unit having contact means projecting into respective through holes on the cover plate into contact with the first terminal unit.