There is a cute web site (www.netw.com/~drfcline then click on memory screens) that refer to core memory planes as "memory screens". Perhaps the word "screens" was used to describe core planes, but I've never seen it used that way before. Anyway there might be a few of us who have not visited this site and so now we can. ---------------------------------------------------------------------------- ------------------------------- Kevin Stumpf * Unusual systems +1.519.744.2900 * EST/EDT GMT - 5 Collector - Commercial Mainframes & Minicomputers from the 50s, 60s, & 70s and control panels and consoles. Author & Publisher - A Guide to Collecting Computers & Computer Collectibles * ISBN 0-9684244-0-6 .