Several days ago, William Donzelli wrote: When I went to Munich to visit my German pen friend 4+/-1 years ago, the Technical University of Munich had just thrown one out. It was made by Control Data Corp., and had a model number like 220 or something. Bernhard was then a student there, and got some bits as souvenirs. I did some swapping and ended up with 4M 18-bit words of 40 and 45 ns static RAM for possible use in one of my systems (I haven't yet!) and, as a museum piece, a card from the CPU. This CPU card was covered on one side in surface mounted 100000 series ECL, which I believe is the same as F100K. The other side of the card had a thin layer of insulator and a thick layer of steel - presumably to interface thermally to a cooling system. Philip.