Quote Originally Posted by A. Jorge Garcia
That would be PDP 11/780s....
No. It was a PDP-11/70. The 11/780 was a VAX - the first one I think.

Quote Originally Posted by wangji
ibm650 filled with double triodes to be changed almost every 1O hours
I sorted punched cards for a LEO computer in England. MTBF was measured in hours - and not many of them either

Best Wishes
Pete