Sense/Net CD is a facility used by citizens of Withmore City to purchase and update their clone data. Through specialized techniques, the citizens DNA is extracted and uploaded to ensure that should their current clone die, they can be reborn and live again.
This costs a modest amount of chyen and can be updated regularly to keep your the citizen's skills, and memory up to date. Clone-death will awaken them at the last point they cloned, with the same skills, memory and any events or memories happening between the time they last cloned and the time of death is lost. Their new clone does not remember them.