CQ
1 of 2communications code abbreviation
—used at the beginning of messages of general information or safety notices or by shortwave amateurs as an invitation to talk to other shortwave amateurs
1
charge of quarters
2
commercial quality
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“CQ.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/CQ. Accessed 23 Dec. 2024.
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