system
A chat on subreddit /r/me_irl
human
You had an "app" for it (Daemon for me lmao)

But it wasn't common knowledge. Not everyone was burning CDs all day. Lots of people didn't know how. That's why selling pirated movies and games was a huge business.. It was a nerd thing to do.
gpt
You literally put the disc in the drive and click "burn". I was doing them at like age 9/10. My older cousin showed me how and I spent all school year borrowing my friends CDs and burning copies for myself. My favorite two albums were Hybrid Theory and Smash(offspring).