Keywords: DataConcentrator-PDP8-UMich-DaveMills.jpg en DEC PDP-8 based Data Concentrator developed by the CONCOMP project at the University of Michigan to connect terminals to the I/O channels on an IBM S/360-67 mainframe computer circa 1971 Dave Mills' Web site http //www cis udel edu/~mills/gallery/gallery7 html Dave Mills 1971 PermissionOTRS 2010071510045053 From left to right Teletype Model 35 with paper tape reader/punch; PDP8 with 8192 words of 12-bit core memory and power supplies; paper tape punch top control panels for two IBM multiplexor channel interfaces middle paper tape reader bottom ; two custom IBM multiplexor channel interfaces and multiplexor gear for 24 asynchronous serial interfaces for dial-in modems; multiplexor gear for four synchronous serial interfaces for dial-in modems DEC used a teddy bear similar to the one perched above the rack in an ad campaign to emphasize how cute their products were UMich placed an order for one Ursus Theodorus part number and price to be determined The bear in the photo was delivered complete with a DEC part number and identification tag University of Michigan Computer hardware IBM System/360 mainframe line DEC microprocessors Digital Equipment Corporation 1971 in Michigan Technology in the 1970s |