Starfleet records. Communications technology. Subspace communication: Subspace communication is mainly used by Starfleet Command to transmit orders to commanding officers of starships on deep-space assignments. Likewise, the vessels' commanding officers use subspace communication to relay reports on their various missions back to Starfleet Command, to ask for suggestions, and/or to make requests. Sources: ENT: "Shockwave"; TOS: "Balance of Terror"; Star Trek II: The Wrath of Khan; TNG: "The Best

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