I think it safe to assume Steve Jobs simply stole absolutely everything else he got credit for. As a powerful person in the organization, other people simply came up to him with their ideas hoping he would bestow on them rewards and he just stole their shit and then made them silent about it. This is how it works in nearly all corporation, whoever has power just legally steals everyone’s work and crushes anyone that complains about it. I filed a patent where I work and I didn’t even get a full week’s pay for it. Not even a paid vacation either, just a simple bonus, my request for unpaid time off was also denied.