Chobits is a manga and anime sequence by CLAMP that begins out as a Magical Girlfriend humor and the closeness between Humans and Persocons; machines programmed to serve humans.
In the future, personal computers have advanced into "Persocons", mobile computers that look like human beings. Hideki Motosuwa, a prep school student, seriously wants to buy a Persocon but cannot afford to.
One day he finds a Persocon that has been thrown away and decides to keep it. When he turns on the Persocon, all she can say is "Chii" so he decides to name her that. After a while, it starts to become apparent that Chii is more than an average Persocon. Having much better performance, it seems that Chii might be a " Chobit," a type of advanced Persocon rumored to have independent thought.