System

 was the computer that helped in the medical and administrative duties at St Gart's Brookside Hospital. (AUDIO: The Harvest)

Its creation came when Katherine Chambers was trying to find a way to revert her brother Nathaniel Chambers' cyber-conversion. With help from Forge operative James Clarke, they created a machine to help diagnose and treat people as a product of their research. They kidnapped Katherine's secretary Eve Morris, and placed her consciousness in the machine and became the voice. As well as containing cyber-technology, it contained elements of Time Lord technology. (AUDIO: The Gathering)