http://www.kempa.com/wp/2004/03/09/vinyl-data/
Excerpt:
One strategy that major record companies have been employing lately to=20
deter downloading is adding bonus computer content to new CD releases. I=20
recently discovered that this technique is not unique to CD=92s, but had =
in=20
fact been practiced in the vinyl era as well. That=92s right: there were =
a=20
handful of records released in the late 70=92s and early 80=92s that cont=
ained=20
computer programs as part of the audio. This is totally insane, and total=
ly=20
great.
Not the same thing, but I beleive that Elektor magazine sold vinyl
records of programs for their computer projects (the TV games computer,
Junior computer, SC/MP system, etc). These were programs only, no
human-type music on the same disk.
Of course you just played the record into the cassete interface port of
the computer project...
-tony