Why there's five types of iPhone, iPod, I think iPad and any other apple product :P on a serious note it really couldn't be technology because he/she built a time machine which is pretty advanced on technology (more than we know to this day) so I guess... You know what I'm really not sure :P
Even though it is not claimed it is immoral to steal it. It was somebody elses and if they lost it they would want it back because they wanted it for a reason. I would feel a whole lot of guilt of I took money from the floor and it turned out that the person who dropped it is a lot of trouble be it being homeless or just generally getting in trouble. Even though it's not been accounted for it doesn't mean that it is yours.