old hardware

Last fall I was given the remains of something(?) from a local municipal office. It has been in my garage all winter, and since our Canadian weather has finally warmed up a bit, I went out to have a look. The only identification that I can reach is on the two drives which are a few hundred pounds each and are Century Data Systems Model T80 A's. Can anyone tell me anything about them? There is also another rack about the same size, but it is buried in other junk and is not accessable. The deal also included a Calcomp 1041 plotter which runs the test plot, but doesn't want to talk to my Windows 95/486. Regards Charlie Fox