<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31383800</termId><termName>lasers</termName><termType>PT</termType><termNote><![CDATA[ Devices that generate electromagnetic radiation in the ultraviolet, visible, or infrared spectrum, in the form of a very narrow continuous or intermittent beam. Originally an acronym for "light amplification by stimulated emission of radiation;" the first functional laser was built by Theodore H. Maiman (1927-2007), and demonstrated in 1960. Lasers have multiple applications: they are used as components in information retrieval and transmission devices and systems, cutting, measuring, and medical tools, and as entertainment devices. ]]></termNote><termCreatedDate>2026-03-30 20:43:34</termCreatedDate><relation><relationType>UF</relationType><termId>31383801</termId><termName>laser</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31383802</termId><termName>optical maser</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31383803</termId><termName>optical masers</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31352499</termId><termName>optical instruments</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31419036</termId><termName>spin flip lasers</termName><termType>PT</termType></relation></term>  </Zthes>