SRAM is used for cache memory in PCs (among other things), so I doubt the technology will die out unless someone finds a process that makes DRAM an order of magnitude faster than it is at present! Cheers, Howard Winter St.Albans, England -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist