Someone whose job is to make "use of communication systems that work by sending electric signals through wires." (Cambridge Dictionary)

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The graph displays the other subjects mentioned on the same pages as the subject "Telegraphers". If the same subject occurs on a page with "Telegraphers" more than once, it appears closer to "Telegraphers" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.