I grew up in a household that was rather behind-the-times, technologically. When I was in 7th grade (1995-96), the only computer we owned was a hopelessly obsolete old MacIntosh.
So one day in Social Studies class, the teacher asked, "Do any of you know who the richest person in the world is?"
A boy answered, "Bill Gates. He's got, like, fifty billion dollars."
"And who is Bill Gates?"
"The guy who invented Windows."
The guy who invented windows. My first thought was, "Wow! No wonder he's so rich-- I've never seen a house without windows."
My second (slightly more intelligent) thought was, "Wait... The guy who invented windows is still alive? How OLD must he be?!"
I forget how long it took me to realize they were talking about the operating system. I'm glad I didn't say anything out loud-- otherwise they never would've let me move up to 8th grade.
A childhood belief about technology

others believed things like this
- When i was in kindergarten, i used to think that i invented the words million and billion— Comonsnadama
- Up until 8th grade or so, I was convinced that I invented the word "Fart"— Jonah
- I used to believe that I invented the X Y coordinate system.Anon
- i used to think bugs could sting you through closed glass windows.Anon
- That when u opened all the windows on just one side of the car the wind would make it tip over.— Schmackalie
- I used to believe my nieghboor jose invented the language spanish and he got rich and bought cars— Thomas