<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">telegraphs</topic></authority><related type="narrower"><topic>engine-room telegraphs</topic></related><related type="broader"><topic>telecommunication systems components</topic></related><variant type="other"><topic>telegraph</topic></variant><variant type="other"><topic>telegraphic</topic></variant> <note xml:lang="en"><![CDATA[ Any of numerous types of devices or systems that allow the transmission of information by coded signal over a distance. Many telegraphic systems have been used over the centuries, but the term most often refers to the electric telegraph, which was developed in the mid-19th century and was the principal means of transmitting printed information by wire or radio wave for over a century. It consisted of a transmitting or sending instrument and a distant receiving instrument connected by a conducting wire or other communications channel. ]]></note></mads>