Ziggy is the super hybrid computer that runs the Project Quantum Leap. It was built by Samuel Beckett and Gooshie, being one of the first creations in the Project Quantum Leap. Ziggy has a sense of humor, which many computers don't have. Sam himself said: The only thing separating Ziggy from a normal calculating machine is his ego. In fact, he later expanded on this in the episode The Leap Back. In this episode, after Ziggy was being particuarly stubborn, Sam lamented about it by saying Why did I have to give him Barbra Streisand's ego? Ziggy has lots of information of the past and gives information to Al to be given to Sam. Ziggy can't express guilt, being a computer. Al uses the Handlink to keep contact with Ziggy while he is in the Imaging Chamber.Ziggy was said that she was capable of doing a trillion floating point calculations at once, and has over 1000 000 GB of memory thus demonstrating part of his immense abilities, and the aformentioned large ego.Sam and Al consistently refer to Ziggy as male, although when the computer's voice is finally heard, it is distinctly female. Although no explanation for this is given in the series, in the novels it is said that Ziggy was originally male, and that Tina changed the voice to a female when she was programming it.Unlike Lothos, Ziggy has no control of Sam's leaps. When Al was briefly blinked out of existence in A Leap For Lisa, Ziggy's name was changed to Alpha.source: http://quantumleap.wikia.com/wiki/Ziggy