The center of a tape reel, around which the tape is wound.
"Dr. Coban, I just realized that I never thanked you for the transfer that you did for me. That was a very nice thing for you to do and I did not expect it all but greatly appreciate it. My friend was very excited to have his song preserved on CD. That was a song that he played keyboards on when he was about 15 years old and it climbed to #19 on ..."