| Trackball(trackball) | | 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 | Trackball is a subclass of computer input device |
| appearance as argument number 2 |
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| (disjoint Joystick Trackball) | ComputerInput.kif 613-613 | Joystick is disjoint from trackball |
| (termFormat EnglishLanguage Trackball "trackball") | domainEnglishFormat.kif 65665-65665 | Joystick is disjoint from trackball |
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