Yes, throwing scrap guys a big list of specific model numbers is *not* the main way to go. Remember that the guys they hire to load and unload the trucks probably do not know where to find the model numbers of the machines, even when they are painfully obvious to us. Some of the guys may not even be able to read. Give them simple rules. For IBM stuff, things to looks for that warrant pulling from the "grinder", as they apply to good machines: 1) Large. The size of a small fridge, at least. 2) Blue. Sometimes red or yellow, rarely gray. Not black. 3) Big black rectangular metal name tags lettered IBM are very good, as are small bare aluminum square ones. Oval ones maybe good. 4) Control panel with switches and lights always are good, even if small, like the size of a magazine. 5) Lots of small circuit boards or modules inside. If most of these conditions are met, the machine is probably worth their time to ask and maybe resell, rather than scrap. The IBM virtual museum on their website is a good place for pictures. http://www-03.ibm.com/ibm/history/exhibits/index.html For other defunct maker of large systems, just the name should warrant pulling - Control Data, Burroughs, Univac. -- Will On Fri, May 31, 2013 at 2:33 PM, Cindy Croxton Electronics Plus <sales at elecplus.com> wrote: