| Trackball | |
| appearance as argument number 1 |
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| (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 |
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| (disjoint Joystick Trackball) | ComputerInput.kif 613-613 | |
| (termFormat EnglishLanguage Trackball "trackball") | domainEnglishFormat.kif 65619-65619 |
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