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A comment on 20 Years Ago, Microsoft introduced its optical mouse. Parent comment

Re:20 Years Ago, Microsoft introduced its optical mouse by jdietrich on Tuesday May 07, 2019 @10:34PM (#19855445)
The EC series is based on the IME 3.0, which has an asymmetrical shape. The FK and ZA series have a symmetrical design based on the IMO 1.0, with the ZA being slightly taller to suit palm grippers.
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