Cyberdyne systems were the defence firm responsible for developing skynet which in turn caused judgment day after becoming self aware and provoking a nuclear attack john connor destroys skynets defence grid and in a last ditch effort to save itself skynet send a terminator cyborg back to 1984 to destroy johns mother sarah before she can give birth to him this is an official design from terminator james camerons science fiction classic starring arnold schwarzeneggerltbr gtltbr g