I'll give you a question, please answer with step-by-step reasoning process. The teacher explained it used a cathode ray tube like other screens, but this what measured things?
Options:
- vacuum tube
- television
- computer
- cathode ray
- oscilloscope

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.