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BasilNorthern t1_j9lpt9c wrote on February 22, 2023 at 9:50 PM

Reply to comment by Happy-Candle6694 in 90's Wireless Mouse and its "dongle" by notWell69

Happy-Candle6694 t1_j9lq45q wrote on February 22, 2023 at 9:52 PM

The answer is right in your image. I agree with it. Pre-optical mouses were mechanical. If you want to see a trackball mouse, it’s in the top of your pic.