System

 was the computer that helped in the medical and administrative duties at St Gart's Bankside Hospital in 2021. (AUDIO: The Harvest)

Its creation was as a result of Katherine Chambers trying to find a way to reverse her brother Nathaniel Chambers' cyber-conversion. With help from Forge operative James Clarke, she created a machine to help diagnose and treat people as a product of their research. On 22 September 2006, 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)