The teacher explained it used a cathode ray tube like other screens, but this what measured things?\nOptions:\n- vacuum tube\n- television\n- computer\n- cathode ray\n- oscilloscope
Step-by-step reasoning process below:

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There are different types of oscilloscopes. One kind of oscilloscope contains cathode ray tubes. Oscilloscope can also be used to measure things. The answer: oscilloscope.
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