I don't really see mouseover previews as being in the same league as ethernet, GUI, laser printers, cryptography, TOR, supercomputing, LISP, Ada, etc, etc...
Xerox, under a fat DARPA grant. If you read Kay's "Early History of Smalltalk", or any of the other writeups on PARC projects, it's a genealogy of DARPA projects:
Xerox
>GUI
Xerox
>laser printers
Xerox
>cryptography
Maybe the Babylonian empire?
Look i stop here..super-computing , TOR, LISP or Ada is not a driving force, they are a product...you could have said WWW made at cern...but hey