Looking to get into a Mini Computer, PDP or something Like that

I remember that Christian Brothers College in Memphis, TN had a Perkin Elmer system, circa 1976-1977.? It was a "mini", but I recall it took up (with peripherals) at least a couple of large racks on a raised floor in a heavily air-conditioned room.? It had a disk drive the size of a small washing machine, with multi-platter removable disk packs that were quite heavy to lift.? There were several ADM-3 terminals in the room for student use, and also several card punches.? I never used the card punches, but perhaps that means there was a card reader as well?? I was a kid at the time, and had more interest in the AIM-65 in the lab across the hall, so I'm fuzzy on the details.? But If that was a typical Perkin-Elmer, it would be more than many would be able to host. I believe these machines were devloped by another company that was acquired by Perkin Elmer. Dave On Thursday, July 24, 2014 8:16 PM, Mark J. Blair <nf6x at nf6x.net> wrote: