<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31398422</termId><termName>oscilloscopes</termName><termType>PT</termType><termNote><![CDATA[ Devices in which the variations in a fluctuating electrical quantity appear temporarily as a visible wave form on a display screen. These plot the relationship between these variations, with the horizontal axis normally being a function of time and the vertical axis the voltage generated by an input signal. The German physicist Ferdinand Braun developed the first cathode-ray oscilloscope in 1897. In general, these are considered the same instrument as an oscilloscope, except that the oscillograph may be capable of creating a permanent record of measurements, while the oscilloscope provides only visual feedback. ]]></termNote><termCreatedDate>2026-03-30 20:47:07</termCreatedDate><relation><relationType>UF</relationType><termId>31398423</termId><termName>oscilloscope</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31358403</termId><termName>electricity measuring devices</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31398418</termId><termName>oscillographs</termName><termType>PT</termType></relation></term>  </Zthes>