The word dude is cool
Probably the Hippies.
Microsoft
someone on LSD
Levi Strauss
Jonannes Gutenburg
1901 by ford
They were invented during WW2
June 29 2007
Walter Frederick Morrison, a POW in WW2
Dean Kamen inevented insulin pump
"Dude" IS a slang word! It means "man" or "fellow."
I think the Parker brothers invented Nerf guns.