To be fair, the textbook that I studied in college was probably written before electricity became widespread in the world. There is so much grey area concerning audio, digital property, and such that we may need to be very open to some new terms in our lives. When I was teaching school, and short 4 years ago - some of my kids all thought that being a "YouTuber" was an actual job. Looks like they may be on to something. Sounded strange at the time, but there are people making a living doing videos in their homes. Go figure.