"It's a UNIX system! I know this!"
— Lex, Jurassic Park (1993)
"I'm doing a (free) operating system (just a hobby, won't be big and professional like gnu) for 386 (486) AT clones.[...] It is NOT portable (uses 386 task switching etc.), and it probably never will support anything other than AT-harddisks."
— Linus Torvalds, 1991. How wrong he was!