I had access to a networked Xerox DocuTech (operations and maintenance) with keyboard, touch screen, optical mouse, etc. in mid-90, I didn’t realize the Xerox inventions are the main stream technology of today until I read it at FR and read by Rush...
Rush failed to mention a few things I picked up on a 2-hour documentary I saw on TV a few years back concerning the history of computers and the modern internet. XEROX-PARC = Palo Alto Research Center. A bunch of XEROX-PARC Execs were tasked by XEROX-NY (corporate) to come up with whatever they could for expanding the business. Supposedly, A year or two later (We're talking 1972 here) they reported back to XEROX corporate with basically everything you currently see in most offices now...PC, Monitor, mouse, & keyboard. XEROX corporate told them they were way out in the Ozone and there was no market for what they came up with. All that prototype equipment was and supposedly still resides in the basement of the XEROX-PARC facility. XEROX could have been the leader in the Computer business, but did not have the foresight to pull it off.