Flowers and Bees?????

Where do all those little roms come from?
This is NO rom request, k?
I was just wondering how people got the roms from cardridge to the pc...
I heard Nintendo had to put up those roms for people to have the opportunity to make a backup copy of their games...
But I can't really imagine that...
So...is there some kind of advice bringing the roms from cardridge to pc or what?
Just interested in that...thx

*lol*...I wasn't planning to buy such thing...
Was just curious...
Well...so that's thje reason there are so many different dumps out there...because different people made them, huh?