The regular person will never get these terms right. Most people are not aware of this game of telephone they're unwillingly being part of. It will never ceases to annoy me. I still shudder at seeing "Troll" being misused.
Actually "engineer" as well in countries where it's not protected. Though the confused look on my German housemate's face when an "engineer" turned up to connect the cable broadband cable to the property was pretty funny.
