| 单词 | tracker ball |
| 释义 | > as lemmastracker ball tracker ball n. Computing = track-ball n. at track v.1 Compounds. ΘΚΠ society > computing and information technology > hardware > peripherals > [noun] > control devices > mouse mouse1965 rollerball1966 track-ball1969 tracker ball1969 1969 Advance in Electronics: Proc. 16th Electronics Congr. 484 The input devices..vary from scheme to scheme but common ones are keyboards, light pens and tracker balls. 1982 Internat. Conf. Radar-82 (Inst. Electr. Engineers) 306/1 A Maintrace Section..distributes the radar signals to the displays and an Intertrace Section..generates the video maps and provides interactive keyboard/tracker-ball facilities. < as lemmas |
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