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Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
After graduating, he joined GTE Sylvania and developed a system called KarTrak which affixed yellow and blue reflective stripes to every car in their rail system, that were scanned as they rolled by various checkpoints, and updated their location.
Source: https://theroanokestar.com/2023/08/25/mike-keeler-a-short-primer-in-technology-101/