The Mystery of the AFIPS Orphans (2006) [pdf]
archive.computerhistory.org
archive.computerhistory.org
I would much prefer copyright be transitioned to a paid for license regime after some suitably long initial term (say 20 years), then those who see continuing commercial value can renew for another 10 year term - and so on up to say 100 years, with increasing fees for every term thereafter.
I think its perfect reasonable to balance the needs of large IP holders - who should be encouraged to do restoration and preservation on the IP they own and letting the commons do those things when there is no viable market for those properties.