I have a Logitech Trakman Marble at work as that is all they will support trackball wise.
At home I have a couple of Cordless Optical TrackMan® units. It works well with the graphics tablet I use when I am editing photos.
I've been using trackballs consistently pretty much from the id 90s, and even more so since 2001 when I had my wrist operated on. When I am forced to use a mouse, people hate it as I turn the sensitivity up all the way to limit my movement. Those that site down and think they'll use my system get frustrated when the pointer only goes from one side of the screen to the other at Flux capacitor speed
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What do you like as far as trackballs go?
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I always liked the one slightly out of view here mounted in this RADAR console. I was using this in 1968. It is a Hughes Aircraft Corp. trackball. If you do not have room for the entire console and no access to a chilled water supply, you can remove the trackball assembly.
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The world's first trackball invented by Tom Cranston, Fred Longstaff and Kenyon Taylor working on the Royal Canadian Navy's DATAR project in 1952. It used a standard Canadian five-pin bowling ball.