Another weird thought...

Imagine you're a time traveller from the recent past who arrives in the present day, can only stay for a few minutes before returning to the past, and hears people mentioning "ipads" and "iphones" but doesn't know anything else about them, apart from an idea that they're computers.

How far back does your origin have to be for your natural assumption to be that the "i" in those names stands for IBM? Early to mid eighties? Could lead to some very unwise investments, considering what happened to IBM and their PC monopoly...