Why don't my floppy drives work after moving them computer to the USA?

One of the developers of Multics, Ken Thompson, continued to develop the operating system after AT&T stopped funding it. His work focused on development of the OS for the GE-645 mainframe. He actually wanted to play a game he was writing called Space Travel. Though the game was never released commercially (and apparently costing $75 per go on the mainframe), the game's development led to the invention of the UNIX operating system.