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Sigma KEE - Trackball

appearance as argument number 1

(documentation Trackball EnglishLanguage "A type of ComputerInputDevice with a ball that can be rolled to control a cursor in the X and Y directions. A Trackball may or may not have an attached button for clicking.") ComputerInput.kif 608-611
(subclass Trackball ComputerInputDevice) ComputerInput.kif 606-606

appearance as argument number 2

(disjoint Joystick Trackball) ComputerInput.kif 613-613
(termFormat EnglishLanguage Trackball "trackball") domainEnglishFormat.kif 65617-65617

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Sigma version 3.0 is open source software produced by Articulate Software and its partners