: Component manufacturers—such as electronic component brands like Amphenol—frequently use prefixes like "RJ" to signify specific product families (e.g., Registered Jacks, RJ45 Ethernet connectors, or modular communication hardware).
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– His niece, who moved to town following her parents' divorce. Rino Akatsuki (暁 莉乃) – Otowa’s older childhood friend. RJ45 Ethernet connectors