Someone here asked about Trackballs at some stage and I keep thinking its you but it must have been someone else
trackballs were created decades before the first mouse.
first trackball in 1946
First mouse in 1964
"Upside Down" Misconception: While it is often said that a trackball is simply an "upside-down mouse," it is more historically accurate to say a mouse is an "upside-down trackball
trackballs were created decades before the first mouse.
first trackball in 1946
First mouse in 1964
A Brief History of the Personal Computer Trackball
Popular PC writings have it that a trackball is nothing more than "an upside down" mouse. This is, however, quite inaccurate revisionist history and, if anything, a mouse is an upside down trackball since development of the trackball pre-dates early development of the mouse by about 11 years...
www.trackballworld.com
"Upside Down" Misconception: While it is often said that a trackball is simply an "upside-down mouse," it is more historically accurate to say a mouse is an "upside-down trackball
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